Free CDL Practice Test

Florida General Knowledge CDL Practice Test

Practice general knowledge CDL questions for Florida. Review each question, learn from the explanations, and prepare for your CDL knowledge exam.

Question 1 of 175

What is the first step of the vehicle inspection routine for a Florida CDL driver?

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What is the first step of the vehicle inspection routine for a Florida CDL driver?
- A. Approach the vehicle and do a general overview
- B. Review your trip route
- C. Check the tires
- D. Check the engine oil level
Answer and explanation
Correct answer: Approach the vehicle and do a general overview
The first step is to approach the vehicle and do a general overview before getting closer to inspect individual systems. This overview lets you spot obvious problems like leaning, fluid leaks, or damage.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
During a pre-trip inspection, you should check that the oil level is:
- A. At the maximum line
- B. Any level, as long as there is oil visible
- C. Between the minimum and maximum marks
- D. Just below the minimum mark
Answer and explanation
Correct answer: Between the minimum and maximum marks
Oil level must be between the minimum and maximum marks on the dipstick. Too little causes engine damage; overfilling can also damage seals.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What should you do if you discover a defect that makes the vehicle unsafe during a pre-trip inspection?
- A. Drive carefully and report it later
- B. Only report it if someone else notices it too
- C. Report it after completing the trip
- D. Do not drive the vehicle until it is repaired
Answer and explanation
Correct answer: Do not drive the vehicle until it is repaired
Federal regulations prohibit operating a CMV with known defects that affect safety. The vehicle must be repaired before operation.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
How often are drivers required to complete a Driver Vehicle Inspection Report (DVIR)?
- A. Every trip
- B. Once a month
- C. At the end of each day they drive
- D. Every week
Answer and explanation
Correct answer: At the end of each day they drive
FMCSA regulations require drivers to complete a DVIR at the end of each day or shift driven, even if no defects are found. This documents the vehicle's condition.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When checking your tires during a pre-trip inspection, the minimum tread depth for front tires is:
- A. 6/32 inch
- B. 8/32 inch
- C. 4/32 inch
- D. 2/32 inch
Answer and explanation
Correct answer: 4/32 inch
Front tires on a CMV require a minimum tread depth of 4/32 inch. All other tires require 2/32 inch. Front tire traction is critical for steering control.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
During a pre-trip inspection, you notice one lug nut is missing from a wheel. You should:
- A. Not drive until the missing lug nut is replaced
- B. Drive with an empty load only
- C. Drive slowly to the nearest tire shop
- D. Continue the trip if the remaining lug nuts are tight
Answer and explanation
Correct answer: Not drive until the missing lug nut is replaced
Missing lug nuts are a serious safety defect. Driving with a missing lug nut puts stress on remaining nuts, risking wheel separation. The vehicle must be repaired before driving.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What does it mean if your steering wheel has more than 10 degrees of play?
- A. Acceptable if you drive slowly
- B. A safety defect that requires repair
- C. Only a problem on highways
- D. Normal for large vehicles
Answer and explanation
Correct answer: A safety defect that requires repair
Excessive steering wheel play (more than 10 degrees or 2 inches on a 20-inch steering wheel) is a safety defect. It means the steering system is worn and must be repaired.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Which of the following should you check when inspecting your mirrors?
- A. That they face straight ahead
- B. Only that they are not cracked
- C. That they are clean and adjusted properly
- D. Mirror color and brightness
Answer and explanation
Correct answer: That they are clean and adjusted properly
Mirrors must be clean and properly adjusted to give the driver maximum visibility of traffic to the rear and sides. Dirty or misadjusted mirrors create blind spots.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
During a pre-trip inspection of the engine compartment, you should check for:
- A. Only the oil level
- B. The color of the engine
- C. Only fluid levels
- D. Leaks, loose belts, hoses, and fluid levels
Answer and explanation
Correct answer: Leaks, loose belts, hoses, and fluid levels
A complete engine compartment inspection includes checking for fluid leaks, belt tension and condition, hose integrity, and fluid levels (oil, coolant, power steering, windshield washer).
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What should you check when inspecting the exhaust system?
- A. Whether the exhaust pipe is hot to the touch
- B. The color of exhaust smoke only
- C. Mounting and leaks — any leaks are dangerous
- D. The length of the exhaust pipe
Answer and explanation
Correct answer: Mounting and leaks — any leaks are dangerous
Exhaust leaks are extremely dangerous — carbon monoxide can enter the cab. Check that the exhaust system is properly mounted, not leaking, and not rubbing against fuel or air lines.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When backing a large truck, you should:
- A. Never back up a large vehicle
- B. Rely on your mirrors only
- C. Back as quickly as possible
- D. Use a helper whenever possible
Answer and explanation
Correct answer: Use a helper whenever possible
You should use a helper (spotter) whenever possible when backing. A helper can see hazards you cannot. If you do use a helper, agree on signals beforehand and never back if you lose sight of them.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What is the purpose of 'off-tracking' knowledge when driving a large vehicle?
- A. Understanding how cargo shifts during turns
- B. Predicting how the vehicle will handle on ice
- C. Knowing that rear wheels track inside the front wheels in turns
- D. Knowing when to shift gears
Answer and explanation
Correct answer: Knowing that rear wheels track inside the front wheels in turns
Off-tracking means the rear wheels of a large vehicle follow a path inside the front wheels during turns. This can cause the rear of the vehicle to run over curbs, pedestrians, or other vehicles if the driver does not account for it.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When making a right turn with a large truck, you should:
- A. Move to the far right only after the turn is complete
- B. Both A and B may be necessary depending on the intersection
- C. Turn from the right lane only
- D. Swing wide to the left first to complete the turn
Answer and explanation
Correct answer: Both A and B may be necessary depending on the intersection
You may need to swing wide or turn from a lane other than the far right to avoid off-tracking over the curb or hitting objects in the turn. The technique depends on intersection geometry and vehicle length.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Smooth steering when driving a large truck is important because:
- A. It saves fuel
- B. It reduces tire wear only
- C. Rough steering can cause a rollover, especially when lightly loaded
- D. It keeps passengers comfortable
Answer and explanation
Correct answer: Rough steering can cause a rollover, especially when lightly loaded
Aggressive steering inputs can cause a rollover in a large vehicle, particularly when lightly loaded. Smooth, controlled steering maintains stability and prevents loss of control.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Why should you not brake hard when your drive wheels begin to skid?
- A. Braking hard locks wheels and makes the skid worse
- B. Hard braking is always acceptable
- C. It will cause more tire wear
- D. Florida law prohibits hard braking
Answer and explanation
Correct answer: Braking hard locks wheels and makes the skid worse
Hard braking when drive wheels are skidding locks them further, extending the skid. You should release the brakes, let the wheels begin to roll, and then re-apply with controlled pressure.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What is the safest way to recover from a drive wheel skid?
- A. Stop braking, accelerate slightly, and steer to correct
- B. Apply the trailer brakes
- C. Steer sharply in the opposite direction
- D. Release the brakes, let wheels roll, then steer to correct
Answer and explanation
Correct answer: Release the brakes, let wheels roll, then steer to correct
To recover from a drive wheel skid: release the brakes to let the wheels roll (restoring steering), then steer to correct the direction of travel. Once you regain control, re-apply brakes gently.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
On a downgrade, you should select the proper gear:
- A. At the bottom of the grade
- B. After starting down the grade
- C. On flat ground before any hill
- D. Before starting down the grade
Answer and explanation
Correct answer: Before starting down the grade
Always select the appropriate gear BEFORE starting a downgrade. Once you are moving downhill with too high a gear, your brakes may overheat trying to control speed, leading to brake failure.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What is meant by 'stab braking'?
- A. Light, continuous brake pressure
- B. Emergency stopping technique using only hand brakes
- C. Pressing and releasing brakes in short, hard bursts on vehicles without ABS
- D. Using only the trailer brakes
Answer and explanation
Correct answer: Pressing and releasing brakes in short, hard bursts on vehicles without ABS
Stab braking (for vehicles without ABS): apply brakes hard until wheels are about to lock, release until they roll, then reapply hard. This allows steering while stopping on slippery surfaces.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When driving through curves, the correct technique is to:
- A. Slow down before the curve and accelerate gently through it
- B. Speed up after entering the curve
- C. Maintain constant speed throughout the curve
- D. Brake while in the curve for maximum control
Answer and explanation
Correct answer: Slow down before the curve and accelerate gently through it
Slow to a safe speed before entering a curve, then gently accelerate through it. Braking in a curve shifts weight and can cause a skid or rollover. Acceleration through the curve improves stability.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Which of the following is the most important thing to do when a tire blows out?
- A. Pull the vehicle to the right immediately
- B. Shift to neutral immediately
- C. Immediately apply the brakes hard
- D. Hold the steering wheel firmly and not brake hard until the vehicle slows
Answer and explanation
Correct answer: Hold the steering wheel firmly and not brake hard until the vehicle slows
Hold the steering wheel firmly with both hands. Avoid hard braking — it can cause loss of control. Let the vehicle slow through engine braking and road resistance, then pull off safely.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When should you downshift?
- A. After starting on a downgrade
- B. Only when your speed drops below 10 mph
- C. Before you actually need the lower gear — before hills and curves
- D. When braking to a stop only
Answer and explanation
Correct answer: Before you actually need the lower gear — before hills and curves
Downshift before you need the lower gear — before starting downhills or entering curves. Waiting until you need it means your engine is already overworked and you may not be able to make the shift safely.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What is 'double clutching'?
- A. Pressing the clutch twice before each gear change
- B. Using both feet on the clutch simultaneously
- C. A prohibited technique for commercial vehicles
- D. Pressing the clutch, shifting to neutral, releasing, pressing again, then shifting to the next gear
Answer and explanation
Correct answer: Pressing the clutch, shifting to neutral, releasing, pressing again, then shifting to the next gear
Double clutching: depress clutch → shift to neutral → release clutch → let engine RPM adjust → depress clutch again → shift to next gear → release clutch. This synchronizes engine and transmission speeds.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
If you miss a gear while going uphill, you should:
- A. Downshift as far as needed
- B. Force the vehicle into gear
- C. Accelerate to the next gear up
- D. Stop the vehicle on the shoulder and restart
Answer and explanation
Correct answer: Downshift as far as needed
If you miss a gear going uphill, downshift as far as necessary to find a gear where the engine has enough power. Forcing a missed gear can damage the transmission.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Retarders are used to:
- A. Replace the service brakes entirely
- B. Only work on electric vehicles
- C. Help slow the vehicle while reducing brake wear
- D. Accelerate large vehicles on highways
Answer and explanation
Correct answer: Help slow the vehicle while reducing brake wear
Retarders (exhaust, engine, hydraulic, or electric) slow the vehicle by applying resistance to the drivetrain, reducing the need for service brakes. This reduces brake wear and heat on long downgrades.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When should you turn retarders off?
- A. At all times in Florida
- B. On dry highways only
- C. Only when loaded with hazardous materials
- D. On wet, icy, or snow-covered roads — they can cause skids
Answer and explanation
Correct answer: On wet, icy, or snow-covered roads — they can cause skids
Turn retarders off on wet, icy, or slippery roads. On a slick surface, retarder force applied to drive wheels can cause them to skid, especially when the trailer is lightly loaded.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
How far ahead should you be looking when driving at highway speeds?
- A. About 2 seconds
- B. 12 to 15 seconds
- C. 5 to 8 seconds
- D. Only as far as your headlights reach
Answer and explanation
Correct answer: 12 to 15 seconds
At highway speeds, look 12 to 15 seconds ahead. This gives you time to identify hazards and respond without emergency braking or steering. At 55 mph, 12 seconds is about a quarter mile.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Large trucks have blind spots called 'No-Zones.' Which of the following is a No-Zone?
- A. Both sides and directly behind the truck
- B. Only the passenger side
- C. Directly in front of the truck
- D. Directly behind the truck — 30 feet or more
Answer and explanation
Correct answer: Both sides and directly behind the truck
Large truck No-Zones include: directly behind the truck (30 feet), directly in front (20 feet), left side (1 lane), and right side (2 lanes). Drivers in these areas may not be visible to the truck driver at all.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
How often should you check your mirrors when driving?
- A. Only when changing lanes
- B. Every 5 to 8 seconds
- C. Only at intersections
- D. Every 30 seconds
Answer and explanation
Correct answer: Every 5 to 8 seconds
Scan your mirrors every 5 to 8 seconds to maintain awareness of surrounding traffic. Regular mirror checks let you identify vehicles entering your blind spots and make safer lane change decisions.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
At an intersection where traffic signals are blocked, you should:
- A. Yield to all vehicles, treat as a 4-way stop
- B. Only stop if there is visible cross traffic
- C. Proceed at normal speed
- D. Honk your horn and proceed
Answer and explanation
Correct answer: Yield to all vehicles, treat as a 4-way stop
When signals are blocked or not working, treat the intersection as a 4-way stop. Yield to vehicles that arrived before you and proceed carefully when it is safe to do so.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When you are driving and you see a pedestrian with a white cane, this means:
- A. They are blind or visually impaired — yield and give extra space
- B. They are a parking enforcement officer
- C. They are directing traffic
- D. They are a construction worker
Answer and explanation
Correct answer: They are blind or visually impaired — yield and give extra space
A white cane indicates the person is blind or visually impaired. They may not hear your vehicle or see traffic signals. Always yield, reduce speed, and give them extra clearance.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
The posted speed limit for a large commercial vehicle in Florida on an interstate highway is:
- A. 65 mph for all vehicles
- B. 70 mph the same as passenger cars
- C. 55 mph regardless of conditions
- D. 65 mph for trucks (lower than 70 mph for passenger cars in some areas)
Answer and explanation
Correct answer: 65 mph for trucks (lower than 70 mph for passenger cars in some areas)
In Florida, the truck speed limit on many interstate sections is 65 mph, which may differ from the 70 mph limit posted for passenger vehicles. Always observe the posted limits for commercial vehicles specifically.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Speed should be reduced when:
- A. Only during nighttime hours
- B. Only on two-lane roads
- C. On curves, slippery roads, in heavy traffic, and during adverse weather
- D. Only in school zones
Answer and explanation
Correct answer: On curves, slippery roads, in heavy traffic, and during adverse weather
Speed must be reduced for curves, slick roads, heavy traffic, adverse weather, limited visibility, work zones, and school zones. Driving too fast for conditions is a leading cause of large vehicle crashes.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Hydroplaning occurs when:
- A. Only when tire pressure is low
- B. Only on unpaved roads
- C. You drive in standing water at any speed
- D. Tires lose contact with the road due to water buildup
Answer and explanation
Correct answer: Tires lose contact with the road due to water buildup
Hydroplaning happens when tires ride on a film of water rather than the road surface, eliminating traction. It can occur at speeds as low as 30 mph on wet roads. Reduce speed in rainy conditions.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Which road surfaces are most likely to be slippery?
- A. Only dirt roads
- B. Concrete on sunny days
- C. Only gravel roads
- D. Shaded areas, bridges, overpasses, and intersections after first rain
Answer and explanation
Correct answer: Shaded areas, bridges, overpasses, and intersections after first rain
Bridges and overpasses freeze first (no ground heat below). Shaded areas stay icy longer. Intersections collect oil and grease which becomes slippery in the first rain. These are high-risk areas for slipping.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
The braking distance for a large truck at 55 mph under ideal conditions is approximately:
- A. 400 feet or more
- B. 100 feet
- C. 216 feet
- D. 50 feet
Answer and explanation
Correct answer: 400 feet or more
Large trucks require significantly more stopping distance than passenger cars. At 55 mph, total stopping distance (perception + reaction + braking) can be 400 feet or more — the length of about 1.3 football fields.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
The minimum following distance for a large truck traveling at 55 mph in good conditions is:
- A. 10 seconds
- B. 4 seconds
- C. 6 seconds
- D. 7 seconds
Answer and explanation
Correct answer: 6 seconds
At 55 mph and above, allow at least 1 second for every 10 feet of vehicle length, plus 1 additional second. For a 60-foot vehicle: 6 seconds minimum. For speeds above 40 mph, add 1 more second.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When another vehicle cuts in front of your truck, what is the correct response?
- A. Slow down to increase your following distance
- B. Immediately brake hard
- C. Swerve around the vehicle
- D. Flash your lights and honk
Answer and explanation
Correct answer: Slow down to increase your following distance
Slow down to re-establish a safe following distance. Aggressive responses (honking, flashing, hard braking) create additional hazards. Your priority is maintaining space to stop safely.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What is the purpose of a 'space cushion' around your vehicle?
- A. To improve fuel economy
- B. To give yourself time and space to react and avoid accidents
- C. To comply with Florida noise regulations
- D. To make other drivers more comfortable
Answer and explanation
Correct answer: To give yourself time and space to react and avoid accidents
A space cushion on all sides gives you time to react to hazards, room to maneuver, and space to stop. Managing this cushion is one of the most important defensive driving skills for CMV operators.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Under which condition should you increase your following distance?
- A. When driving on a flat highway in dry conditions
- B. When carrying a light load
- C. When driving on wet roads, at night, or when visibility is reduced
- D. When other drivers are following you closely
Answer and explanation
Correct answer: When driving on wet roads, at night, or when visibility is reduced
Increase following distance during adverse conditions: wet or slippery roads, reduced visibility (fog, rain, night), and when cargo increases stopping distance (heavy loads, liquid loads).
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
How much overhead clearance does a large truck typically need?
- A. 15 feet
- B. 13 feet 6 inches
- C. 10 feet
- D. No specific clearance required
Answer and explanation
Correct answer: 13 feet 6 inches
The federal maximum vehicle height is 13 feet 6 inches. However, you must know your vehicle's actual height and confirm clearance before proceeding under bridges, overpasses, and through tunnels. Florida has many low clearances near ports and older urban areas.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When should you use high beams?
- A. At all times on Florida highways
- B. When there is no oncoming traffic or traffic ahead within 500 feet
- C. Never — low beams are always safer
- D. Only in heavy rain
Answer and explanation
Correct answer: When there is no oncoming traffic or traffic ahead within 500 feet
Use high beams when there are no oncoming vehicles within 500 feet and no vehicles directly ahead. High beams significantly extend your visibility but must be dimmed to avoid blinding other drivers.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What is 'over-driving your headlights'?
- A. Driving with misaligned headlights
- B. Having headlights that are too bright
- C. Driving faster than you can stop within the distance your headlights illuminate
- D. Using headlights in daylight
Answer and explanation
Correct answer: Driving faster than you can stop within the distance your headlights illuminate
Over-driving headlights means driving at a speed where you cannot stop within the distance your headlights illuminate. At 55 mph with low beams (250 feet), your stopping distance may exceed your visibility range.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Fatigue is a greater hazard at night because:
- A. Night driving is illegal for CMV operators
- B. Roads are more slippery
- C. The body is naturally programmed to sleep at night, reducing alertness
- D. Other drivers drive faster at night
Answer and explanation
Correct answer: The body is naturally programmed to sleep at night, reducing alertness
The body's circadian rhythm naturally decreases alertness at night, particularly between 12:00 and 6:00 AM. CMV drivers are at significantly higher risk of fatigue-related crashes during nighttime hours.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When meeting oncoming vehicles with bright headlights at night, you should:
- A. Look toward the right side of the road
- B. Increase your speed to pass quickly
- C. Flash your own high beams
- D. Stare directly at the oncoming lights
Answer and explanation
Correct answer: Look toward the right side of the road
Avoid looking directly at oncoming headlights. Look toward the right edge of the road to maintain your lane position while reducing the blinding effect. Continue at a safe speed.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When driving at night, you should reduce your speed because:
- A. Other vehicles drive faster at night
- B. Night speed limits are lower in Florida
- C. Florida law requires reduced night speed for CMV operators
- D. Your visibility is reduced and you need more time to react to hazards
Answer and explanation
Correct answer: Your visibility is reduced and you need more time to react to hazards
Reduced visibility at night means you see hazards later and have less time to react. Reducing speed gives you more time and distance to respond to hazards that appear within your headlight range.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When driving in heavy fog, you should:
- A. Only reduce speed in zero-visibility conditions
- B. Use high beams for maximum visibility
- C. Use low beams or fog lights, reduce speed, and increase following distance
- D. Continue at normal speed
Answer and explanation
Correct answer: Use low beams or fog lights, reduce speed, and increase following distance
High beams reflect off fog and reduce visibility. Use low beams or fog lights. Reduce speed significantly and increase following distance. If visibility is extremely limited, pull safely off the road.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
In Florida, sudden heavy rainstorms called 'Florida rain events' can reduce visibility to near zero. What should you do?
- A. Speed up to get through the rain faster
- B. Turn on hazard lights, reduce speed, and if necessary pull off the road safely
- C. Pull into any available lane
- D. Maintain speed and use wipers
Answer and explanation
Correct answer: Turn on hazard lights, reduce speed, and if necessary pull off the road safely
Florida's intense convective rain events can create zero-visibility conditions within seconds. Reduce speed immediately, activate hazard lights, and if visibility becomes dangerous, pull safely off the road and wait for conditions to improve.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When driving in high wind conditions, which loads are most affected?
- A. High-profile loads like box trailers, empty flatbeds, and livestock trailers
- B. Only loads over 80,000 lbs
- C. Liquid tankers only
- D. Heavy, low-profile loads
Answer and explanation
Correct answer: High-profile loads like box trailers, empty flatbeds, and livestock trailers
High-profile loads (box trailers, RVs, livestock trailers) have large surface areas that catch wind. Empty trailers are especially vulnerable because they have high wind resistance but little weight to maintain stability.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
If your vehicle starts to skid sideways on a slippery road, you should:
- A. Steer in the opposite direction of the skid
- B. Steer in the direction of the skid — the direction the rear of the vehicle is sliding toward
- C. Brake hard and hold the wheel straight
- D. Apply the parking brake
Answer and explanation
Correct answer: Steer in the direction of the skid — the direction the rear of the vehicle is sliding toward
To correct a skid: steer in the direction the rear is sliding (toward). This is called counter-steering. Simultaneously, do not brake — let up on the accelerator. Overcorrecting can cause a spin.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Which of the following is true about driving through water on Florida roadways?
- A. Never drive through water of unknown depth — even shallow water can disable your brakes
- B. It is safe to drive through water of any depth if driving slowly
- C. All Florida roads are designed to drain water quickly
- D. Water deeper than your wheel hubs can be driven through safely
Answer and explanation
Correct answer: Never drive through water of unknown depth — even shallow water can disable your brakes
Never drive through water of unknown depth. Even 12 inches of moving water can sweep a vehicle off course. After driving through water, test your brakes by gently applying them to restore brake effectiveness.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
If your engine catches fire, you should:
- A. Open the hood to air out the engine
- B. Drive to the nearest gas station
- C. Pour water on the engine immediately
- D. NOT open the hood — pull over and call 911, keeping the hood closed to limit oxygen
Answer and explanation
Correct answer: NOT open the hood — pull over and call 911, keeping the hood closed to limit oxygen
Do not open the hood — oxygen feeds the fire. Pull off the road safely, shut off the engine, evacuate passengers, and call 911. Use a fire extinguisher if available but do not open the hood unless trained to do so.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
If your brakes fail on a downgrade, what is your best option?
- A. Look for a runaway truck ramp or use the shoulder to slow down
- B. Shift to neutral and coast
- C. Apply only the parking brake
- D. Pump the brakes rapidly
Answer and explanation
Correct answer: Look for a runaway truck ramp or use the shoulder to slow down
If service brakes fail on a downgrade, use a runaway truck ramp if available. If not, find an escape route such as an uphill side road or open area to slow the vehicle. Friction from the road surface can help reduce speed.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
A tire blowout on a front wheel is especially dangerous because:
- A. Florida roads are not designed for blowouts
- B. The vehicle will immediately stop
- C. Front tires cost more to replace
- D. It affects steering control directly
Answer and explanation
Correct answer: It affects steering control directly
A front tire blowout directly affects steering — the vehicle may pull strongly to the blown side. Hold the wheel firmly, avoid braking hard, and gradually reduce speed before pulling off the road.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When an accident occurs and you are the driver, your first priority is:
- A. Move vehicles off the road immediately
- B. Contact your employer
- C. Protect the accident scene and call for help if needed
- D. Document damage for insurance
Answer and explanation
Correct answer: Protect the accident scene and call for help if needed
First priority: protect the scene (warn other traffic with flares/triangles), check for injuries, and call for emergency services if needed. Do not move injured persons unless they are in immediate danger.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
You should use your horn when:
- A. To express frustration at traffic
- B. To warn drivers who appear to be about to move into your lane
- C. Required by Florida law at all intersections
- D. To signal that you are passing on a two-lane road
Answer and explanation
Correct answer: To warn drivers who appear to be about to move into your lane
Your horn is a safety device to warn other road users of danger — such as when another driver appears unaware of your presence. Using it for frustration or aggression is prohibited and counterproductive.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
The maximum legal gross vehicle weight on most Florida interstate highways is:
- A. 72,000 lbs
- B. 100,000 lbs
- C. 80,000 lbs
- D. 90,000 lbs
Answer and explanation
Correct answer: 80,000 lbs
The federal maximum gross vehicle weight is 80,000 lbs on interstate highways. Florida follows federal limits. Loads exceeding this require oversize/overweight permits from FDOT.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What is the purpose of cargo blocking and bracing?
- A. To prevent cargo from shifting or falling
- B. To meet insurance requirements only
- C. To facilitate faster loading
- D. To reduce vehicle weight
Answer and explanation
Correct answer: To prevent cargo from shifting or falling
Blocking and bracing prevents cargo from shifting or falling during transport. Shifting cargo can change vehicle handling, cause rollover, or fall onto other vehicles and cause accidents.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
How should you adjust your driving when carrying a heavy load?
- A. Only adjust when on wet roads
- B. No adjustment is needed
- C. Increase following distance and reduce speed on curves
- D. Drive faster since the vehicle is more stable
Answer and explanation
Correct answer: Increase following distance and reduce speed on curves
Heavy loads increase stopping distances significantly and affect handling in curves. Increase your following distance, reduce speed before curves, and allow more time for all maneuvers.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Which of the following is true about cargo securement?
- A. Securing cargo is optional if driving under 45 mph
- B. Cargo only needs to be secured for loads over 1,000 lbs
- C. Tarps alone are sufficient for all cargo types
- D. All cargo must be secured to prevent shifting during normal driving, braking, and turns
Answer and explanation
Correct answer: All cargo must be secured to prevent shifting during normal driving, braking, and turns
All cargo must be properly secured with appropriate tie-downs to prevent any shifting during acceleration, braking, or turning. FMCSA cargo securement rules (49 CFR Part 393) apply regardless of load weight.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When should you check your cargo during a trip?
- A. Within the first 50 miles, and then every 3 hours or 150 miles
- B. Only at the destination
- C. Once per day maximum
- D. Only if you hear unusual sounds
Answer and explanation
Correct answer: Within the first 50 miles, and then every 3 hours or 150 miles
Check cargo within the first 50 miles of beginning a trip, and then every 3 hours or 150 miles thereafter. Cargo can shift during initial movement and may require re-securing during long hauls.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
For a non-exempt federal property-carrying driver, the break trigger is how many cumulative hours of driving without a thirty-minute interruption?
- A. 10 hours
- B. 8 hours
- C. 12 hours
- D. 5 hours
Answer and explanation
Correct answer: 8 hours
Unless a qualifying exception applies, a federal property-carrying driver cannot drive after more than eight cumulative driving hours without a consecutive 30-minute interruption of driving. Off-duty, sleeper-berth and on-duty-not-driving time can satisfy the interruption. The trigger is driving time, not simply time on duty.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Under the ordinary federal property-carrying HOS rules, with no applicable exception, what is the driving-time limit after ten consecutive hours off duty?
- A. 14 hours
- B. 10 hours
- C. 11 hours
- D. 12 hours
Answer and explanation
Correct answer: 11 hours
For a property-carrying driver subject to the ordinary federal rule, up to 11 hours of driving are allowed after 10 consecutive hours off duty, within the applicable driving window. Exceptions must be assessed separately. This is not a statement of every state's intrastate rules or the passenger-carrying limit.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
A Florida CDL driver must have a minimum of how many consecutive hours off duty before driving again?
- A. 10 hours
- B. 8 hours
- C. 6 hours
- D. 12 hours
Answer and explanation
Correct answer: 10 hours
Property-carrying CMV drivers must have at least 10 consecutive hours off duty before resuming driving. This rest requirement applies to most interstate commercial drivers.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Which of the following is a sign of driver fatigue?
- A. Faster reaction times
- B. Reduced stopping distance
- C. Increased alertness
- D. Difficulty maintaining lane position, frequent yawning, heavy eyelids
Answer and explanation
Correct answer: Difficulty maintaining lane position, frequent yawning, heavy eyelids
Fatigue warning signs include: lane drifting, difficulty maintaining speed, yawning, heavy eyelids, missing exits, and no memory of the last few miles. When any of these occur, pull over and rest.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What is the best way to combat driver fatigue?
- A. Open your window for fresh air
- B. Drink coffee and keep driving
- C. Pull off the road and sleep — there is no substitute for sleep
- D. Turn up the radio
Answer and explanation
Correct answer: Pull off the road and sleep — there is no substitute for sleep
Sleep is the only true remedy for fatigue. Coffee, fresh air, and music provide temporary relief at best. A driver who feels drowsy must pull off safely and sleep before continuing.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What should you do if you see a diamond-shaped placard on another vehicle indicating hazardous materials?
- A. Pass the vehicle as quickly as possible
- B. Nothing — placards are informational only
- C. Tailgate closely to monitor the vehicle
- D. Maintain extra space and be prepared for potential emergencies
Answer and explanation
Correct answer: Maintain extra space and be prepared for potential emergencies
When following a vehicle carrying hazardous materials, maintain extra space. In the event of a fire, explosion, or spill, you want maximum distance between your vehicle and the hazmat.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
If you discover a hazardous materials leak from your cargo during a trip, you should:
- A. Continue to the destination and report it then
- B. Try to stop the leak yourself
- C. Drive to the nearest hospital
- D. Pull off the road, stay upwind, keep the public away, and contact emergency services
Answer and explanation
Correct answer: Pull off the road, stay upwind, keep the public away, and contact emergency services
If hazmat leaks: pull off the road safely, do NOT continue driving. Stay upwind and away from the leak. Keep others away. Call 911 and your company. Do not attempt to stop the leak unless trained to do so.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Which of the following vehicles are NOT required to have hazmat placards?
- A. Vehicles carrying small amounts below the placard threshold amounts
- B. Fuel trucks
- C. Vehicles carrying more than 1,000 lbs of hazmat
- D. Chemical tankers
Answer and explanation
Correct answer: Vehicles carrying small amounts below the placard threshold amounts
Hazmat placard requirements are based on the type and quantity of material. Below certain threshold amounts (which vary by hazard class), placards are not required. Above thresholds, placards are mandatory.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
After an accident in Florida, a CMV driver involved in a serious accident must:
- A. Leave the scene to find a phone
- B. Remain at the scene, render aid, call for help, and exchange information
- C. Move the vehicles immediately
- D. Report the accident only to their employer
Answer and explanation
Correct answer: Remain at the scene, render aid, call for help, and exchange information
Florida law and federal regulations require drivers to remain at the scene of an accident, provide aid, call emergency services, and exchange information. Leaving the scene of a serious accident is a felony in Florida.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Warning devices (triangles, flares) should be placed after an accident or breakdown:
- A. Only on interstate highways
- B. Only if other drivers are not slowing down
- C. Only during nighttime hours
- D. Within 10 minutes of stopping on the roadway, at 10, 100, and 200 feet behind the vehicle
Answer and explanation
Correct answer: Within 10 minutes of stopping on the roadway, at 10, 100, and 200 feet behind the vehicle
FMCSA requires warning devices to be placed within 10 minutes of stopping on a roadway or its shoulder. Place at 10 feet behind, 100 feet behind, and 200 feet behind the vehicle to warn approaching traffic.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
In Florida, you can be disqualified from holding a CDL for:
- A. A DUI, leaving the scene of an accident, using a CMV in a felony, and other specified offenses
- B. Parking violations only
- C. One serious traffic violation only
- D. Minor speeding tickets only
Answer and explanation
Correct answer: A DUI, leaving the scene of an accident, using a CMV in a felony, and other specified offenses
CDL disqualifying offenses include: DUI/DWI, refusing a blood alcohol test, leaving the scene of an accident, using a CMV in a felony, and certain serious traffic violations. Multiple offenses can result in lifetime disqualification.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Under Florida and federal law, how many valid driver's licenses may a CDL holder have?
- A. Two — one CDL and one regular
- B. Three — one per state they drive in
- C. As many as needed for different states
- D. One — CDL holders can only have one license
Answer and explanation
Correct answer: One — CDL holders can only have one license
A CDL holder is permitted to have only ONE valid driver's license. This is a federal requirement. A CDL driver who holds licenses from more than one state must choose one home state and cancel the others.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
How long does a Florida CDL remain valid before requiring renewal?
- A. 6 years
- B. 5 years
- C. 8 years
- D. 4 years
Answer and explanation
Correct answer: 8 years
A Florida CDL is valid for 8 years — one of the longest renewal periods in the United States (tied with Texas). HazMat endorsements expire every 4 years and require a new TSA security threat assessment.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Within how many days must a Florida CDL driver notify their employer of a traffic violation (other than parking) in ANY vehicle?
- A. 60 days
- B. 30 days
- C. 90 days
- D. 7 days
Answer and explanation
Correct answer: 7 days
Federal regulations require a CDL holder to notify their employer within 30 days of any traffic conviction (in any vehicle, not just CMVs). You must also notify the state that issued your CDL within 30 days.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
A Commercial Learner's Permit (CLP) in Florida is valid for how long?
- A. 90 days
- B. 24 months
- C. 12 months from the date the General Knowledge test was passed
- D. 6 months
Answer and explanation
Correct answer: 12 months from the date the General Knowledge test was passed
A Florida CLP is valid for 12 months from the date you passed the CDL General Knowledge examination (not from the CLP issuance date). You must complete the skills test within this 12-month window.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
The minimum age to obtain a CDL in Florida for intrastate (Florida-only) commercial driving is:
- A. 16
- B. 17
- C. 21
- D. 18
Answer and explanation
Correct answer: 18
The minimum age for a Florida CDL is 18. Drivers under 21 are restricted to intrastate (Florida-only) commercial driving. Interstate CDL operation requires age 21 under federal regulations.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Before receiving a Florida CDL, first-time applicants must:
- A. Take a written test only
- B. Pass a vision test only
- C. Complete ELDT from an FMCSA-registered provider
- D. Complete 100 hours of supervised driving
Answer and explanation
Correct answer: Complete ELDT from an FMCSA-registered provider
Since February 7, 2022, all first-time Class A or B CDL applicants (those who have never held a CDL before) must complete Entry-Level Driver Training (ELDT) from an FMCSA Training Provider Registry-registered provider.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Which Florida state agency issues CDLs?
- A. Florida Department of Revenue
- B. Florida Highway Patrol (FHP)
- C. Florida Department of Highway Safety and Motor Vehicles (FLHSMV)
- D. Florida Department of Transportation (FDOT)
Answer and explanation
Correct answer: Florida Department of Highway Safety and Motor Vehicles (FLHSMV)
The Florida Department of Highway Safety and Motor Vehicles (FLHSMV) is the state agency responsible for issuing CDLs, CLPs, and all driver licenses in Florida. CDL knowledge tests are taken at FLHSMV service centers or county tax collector offices.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
In Florida, CDL skills tests are administered by:
- A. Any CDL school
- B. Federal FMCSA agents
- C. FLHSMV-contracted third-party testing sites only
- D. Florida DMV officers at state offices
Answer and explanation
Correct answer: FLHSMV-contracted third-party testing sites only
Florida does not administer CDL skills tests at FLHSMV offices. ALL CDL skills tests in Florida are conducted exclusively at FLHSMV-contracted third-party testing sites. Fees range from $150 to $700 depending on vehicle class and location.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What language are Florida CDL knowledge and skills tests administered in, as of February 6, 2026?
- A. Any language upon request
- B. English and Spanish
- C. English, Spanish, and Haitian-Creole
- D. English only
Answer and explanation
Correct answer: English only
Effective February 6, 2026, FLHSMV directed that ALL Florida driver license knowledge and skills examinations be administered exclusively in English. This includes CDL tests. Previously, CDL exams were offered in English and Spanish. Interpreters are no longer permitted.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What Florida-specific change to DOT medical certificate submission took effect December 16, 2025?
- A. Annual physicals are now required instead of every two years
- B. Paper medical certificates are NO LONGER accepted — results must be submitted electronically by the examiner
- C. Florida no longer requires DOT physicals
- D. Paper certificates are now acceptable
Answer and explanation
Correct answer: Paper medical certificates are NO LONGER accepted — results must be submitted electronically by the examiner
As of December 16, 2025, Florida no longer accepts paper Medical Examiner's Certificates. Certified examiners must submit results electronically to the FMCSA National Registry. The FLHSMV receives this data directly. You should wait 24-48 business hours after your physical before your FLHSMV appointment.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
After getting your DOT physical in Florida, you should wait before going to the FLHSMV for your CLP because:
- A. The waiting period is required by Florida law — 5 business days minimum
- B. You must fast for 24 hours after the physical
- C. Florida requires a 72-hour waiting period
- D. Your examiner must electronically submit your results to the FMCSA National Registry, which takes 24-48 business hours
Answer and explanation
Correct answer: Your examiner must electronically submit your results to the FMCSA National Registry, which takes 24-48 business hours
Your DOT physical results must be electronically submitted to the FMCSA National Registry by your examiner. The FLHSMV accesses this record electronically. Allow 24-48 business hours for the record to appear before your CLP appointment. Show up too early and the record may not be in the system yet.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
A Florida CDL driver whose medical certificate expires must:
- A. Continue driving for 30 days while applying for renewal
- B. Only notify their employer — no DMV action required
- C. Stop driving immediately without exception
- D. Have their CDL downgraded to a non-commercial license if they do not provide updated certification
Answer and explanation
Correct answer: Have their CDL downgraded to a non-commercial license if they do not provide updated certification
If a CDL holder fails to maintain current medical certification on file with the FLHSMV, their CDL will be downgraded to a non-commercial license (Class E). They cannot operate CMVs until their medical certification is updated and their CDL is reinstated.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
How many proofs of Florida residential address are required when applying for a Florida CDL?
- A. A Declaration of Domicile only
- B. Two proofs of Florida residential address
- C. Three documents
- D. One proof of residency
Answer and explanation
Correct answer: Two proofs of Florida residential address
Effective June 1, 2022, all Florida CLP and CDL applicants must present TWO proofs of Florida residential address. This is stricter than many other states. One document must come from List A, and one from List B, or two from List A.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Before applying for a Florida CDL, you must first have a valid:
- A. Florida Class E (non-commercial) driver license
- B. Commercial Learner's Permit
- C. Social Security Card only
- D. Passport
Answer and explanation
Correct answer: Florida Class E (non-commercial) driver license
Florida requires all CDL applicants to hold a valid Florida Class E (non-commercial) driver license before they can apply for a CDL. You cannot apply for a CDL or CLP without an existing Florida driver license.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
A Florida resident who held a CDL in another state wishes to transfer to a Florida CDL. Regarding the skills test:
- A. Must wait 6 months before applying
- B. The skills test is generally waived if they hold a valid out-of-state CDL
- C. Must complete ELDT again regardless of experience
- D. Must take the full skills test
Answer and explanation
Correct answer: The skills test is generally waived if they hold a valid out-of-state CDL
Florida generally waives the CDL skills test for applicants transferring from a valid out-of-state CDL. They must surrender their out-of-state CDL, pass a vision exam, and pay applicable fees. This is a significant difference from California, which requires full retesting.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
A vehicle transporting hazardous materials is required to stop before crossing railroad tracks when:
- A. Only when a train is approaching
- B. Always, unless directed by a police officer or traffic signal to proceed
- C. Only when the load includes explosives
- D. Never — hazmat vehicles have priority at railroad crossings
Answer and explanation
Correct answer: Always, unless directed by a police officer or traffic signal to proceed
Vehicles carrying hazardous materials in quantities requiring placards MUST stop 15 to 50 feet before railroad tracks. They may proceed only after determining it is safe and the vehicle can clear the tracks without stopping.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
The hazmat placard system is based on:
- A. The size of the shipment only
- B. The type of hazard the material presents, shown by color, symbol, and number
- C. The distance the cargo will travel
- D. The carrier's insurance policy
Answer and explanation
Correct answer: The type of hazard the material presents, shown by color, symbol, and number
Hazmat placards use color-coding, symbols, and UN/NA numbers to communicate the type of hazard (flammable, explosive, corrosive, etc.) to emergency responders and other drivers. Understanding these placards is essential for all CDL drivers.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What does a driver do if they are not sure whether a load requires hazmat placards?
- A. Assume it does and placard the vehicle
- B. Consult the shipper and the DOT hazmat table (49 CFR Part 172)
- C. Call the FLHSMV for guidance
- D. Load and drive — you can check at the destination
Answer and explanation
Correct answer: Consult the shipper and the DOT hazmat table (49 CFR Part 172)
If in doubt about placard requirements, consult the shipping papers and the DOT hazardous materials table in 49 CFR Part 172. The shipper is responsible for preparing shipping papers and informing the carrier of the hazmat class and quantity.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What information is found on a hazmat shipping paper?
- A. The proper shipping name, hazard class, UN/NA number, packing group, and quantity
- B. The driver's personal information
- C. Only the carrier's MC number
- D. Only the destination address
Answer and explanation
Correct answer: The proper shipping name, hazard class, UN/NA number, packing group, and quantity
Hazmat shipping papers must include: proper shipping name, hazard class or division, UN or NA identification number, packing group (when applicable), and total quantity. This information is essential for emergency responders.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Florida law requires CMV drivers to do which of the following at railroad crossings?
- A. Slow to 15 mph and listen for trains
- B. Only stop if signals are active
- C. Stop 15 to 50 feet from the nearest rail and not proceed until safe
- D. Honk the horn and proceed
Answer and explanation
Correct answer: Stop 15 to 50 feet from the nearest rail and not proceed until safe
Florida law and federal regulations require CMV drivers (and hazmat vehicles) to stop 15 to 50 feet from the nearest rail and not proceed until they can see clearly in both directions and know the vehicle can clear the tracks.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
You should never stop your vehicle on a railroad crossing unless:
- A. You need to check your cargo
- B. The crossing signals are not working
- C. You are directed to by an officer
- D. Traffic ahead is stopped and you cannot clear the crossing
Answer and explanation
Correct answer: Traffic ahead is stopped and you cannot clear the crossing
Never stop on a railroad crossing. If traffic is backed up ahead, wait before the crossing until you are sure there is room to completely clear the tracks before pulling forward. Getting stuck on tracks with a train approaching is fatal.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When descending a long steep grade, you should use:
- A. Neutral and coast
- B. Only the engine brake with no service brakes
- C. High gears and light braking
- D. Low gears and controlled braking — the same gear you would use going up
Answer and explanation
Correct answer: Low gears and controlled braking — the same gear you would use going up
Select the same low gear going down that you would use going up. Use controlled service brake application — about 3-4 seconds at a time — then release to let brakes cool. Never ride the brakes continuously on long downgrades.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Brake fade on a long downgrade is caused by:
- A. Overheating of the brakes from continuous application
- B. Low air pressure in the system
- C. Incorrect gear selection on flat ground
- D. The parking brake engaging automatically
Answer and explanation
Correct answer: Overheating of the brakes from continuous application
Continuous brake application causes heat buildup. Brake fade occurs when brake drums/rotors become so hot that friction is reduced and braking effectiveness decreases dramatically. Use low gears and intermittent braking to prevent overheating.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
The maximum single axle weight limit on Florida state roads is:
- A. 18,000 lbs
- B. 20,000 lbs
- C. 22,000 lbs
- D. 24,000 lbs
Answer and explanation
Correct answer: 20,000 lbs
Florida law sets the maximum single axle weight at 20,000 lbs (matching the federal limit). Tandem axle limits are 34,000 lbs. Overweight operations require special permits from the Florida Department of Transportation.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
An overweight permit in Florida is obtained from:
- A. FLHSMV
- B. Florida Highway Patrol
- C. Florida Department of Transportation (FDOT)
- D. The county tax collector
Answer and explanation
Correct answer: Florida Department of Transportation (FDOT)
Oversize and overweight vehicle permits in Florida are issued by the Florida Department of Transportation (FDOT). Permits specify approved routes, time of travel, and escort requirements. Operating overweight without a permit is a serious violation.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What does the term 'gross vehicle weight rating' (GVWR) mean?
- A. The weight of the vehicle without any cargo
- B. The maximum weight the vehicle is designed to carry — set by the manufacturer
- C. The actual current weight of the vehicle and its load
- D. The combined weight of all axles
Answer and explanation
Correct answer: The maximum weight the vehicle is designed to carry — set by the manufacturer
GVWR is the maximum allowable loaded weight of a single vehicle as specified by the manufacturer. It includes the vehicle's own weight plus maximum payload. Class A CDL is required when GVWR exceeds 26,001 lbs in combination with a towed vehicle over 10,000 lbs.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Florida has a particularly high risk of which weather hazard that affects CDL drivers?
- A. Blizzards and ice storms
- B. Intense sudden rainstorms and afternoon thunderstorms — often with lightning
- C. Tornadoes affecting every county every year
- D. Desert sandstorms
Answer and explanation
Correct answer: Intense sudden rainstorms and afternoon thunderstorms — often with lightning
Florida experiences intense afternoon convective thunderstorms, especially June through September. These can produce heavy rain, near-zero visibility, strong winds, and dangerous lightning. CDL drivers must be prepared to safely pull off the road when these storms occur.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What is the correct action if you see a vehicle stopped with its hazard lights flashing on a Florida highway?
- A. Accelerate past them quickly
- B. Only slow down on two-lane roads
- C. Maintain your speed
- D. Move over one lane if possible, or slow down significantly if you cannot move over — required by Florida's Move Over Law
Answer and explanation
Correct answer: Move over one lane if possible, or slow down significantly if you cannot move over — required by Florida's Move Over Law
Florida's Move Over Law (Florida Statute 316.126) requires drivers to move over one lane away from stopped emergency vehicles, law enforcement, sanitation workers, and disabled vehicles with hazard lights. If unable to move over, significantly reduce speed. Violations carry heavy fines.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Which document must a Florida CDL driver keep with them at all times while operating a commercial vehicle?
- A. Their vehicle's title
- B. Their CDL and current medical certification
- C. Their employer's USDOT number card
- D. Their ELDT completion certificate
Answer and explanation
Correct answer: Their CDL and current medical certification
A Florida CDL holder must carry their valid CDL and must be able to demonstrate current medical certification. During roadside inspections, officers will check for a valid CDL for the vehicle class being operated and will verify medical certification status in FMCSA systems.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What is a 'header board' used for on a flatbed truck?
- A. To display the company name
- B. To protect the cab from forward-shifting cargo
- C. To secure rear cargo doors
- D. To attach tarps to
Answer and explanation
Correct answer: To protect the cab from forward-shifting cargo
A header board (also called a headache rack) protects the cab and driver from cargo shifting forward during hard braking. It is mounted at the front of the flatbed and must be strong enough to withstand cargo impact.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When transporting liquids in a tanker, which condition is most dangerous?
- A. A tank with exactly half its capacity
- B. A full tank
- C. A partially filled tank — liquid surge can cause loss of control
- D. An empty tank
Answer and explanation
Correct answer: A partially filled tank — liquid surge can cause loss of control
Liquid surge in a partially filled tanker is extremely dangerous. When you brake or turn, the liquid continues moving, amplifying your vehicle's movement. This can cause skidding, jackknifing, or rollover. Drive more slowly and leave larger following distances.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What is the purpose of the Department of Transportation (DOT) number on a commercial vehicle?
- A. It is a carrier identification number used for safety monitoring and compliance
- B. It identifies the vehicle's weight class
- C. It indicates the maximum cargo weight
- D. It shows the vehicle's insurance status
Answer and explanation
Correct answer: It is a carrier identification number used for safety monitoring and compliance
The USDOT number identifies the carrier for safety enforcement, compliance reviews, crash investigations, and inspections. Carriers operating interstate must display their USDOT number on all CMVs.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
The purpose of a vehicle's governor is to:
- A. Regulate air brake pressure
- B. Control the fuel mixture
- C. Control the transmission shift points only
- D. Limit the maximum engine RPM or vehicle speed
Answer and explanation
Correct answer: Limit the maximum engine RPM or vehicle speed
A governor limits maximum engine RPM or vehicle speed to prevent over-revving and improve fuel efficiency. Some governors are set by fleet operators to limit top speed for safety and fuel economy purposes.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What does the 'low air warning' light or buzzer indicate in an air brake system?
- A. The air pressure is above normal
- B. Brakes need adjustment
- C. Air pressure has dropped below 60 psi — a dangerous level
- D. Time for routine maintenance
Answer and explanation
Correct answer: Air pressure has dropped below 60 psi — a dangerous level
The low air pressure warning activates at 60 psi. Below 60 psi, you may not have enough air pressure to fully apply the brakes. At 20-45 psi, spring brakes automatically apply. Pull off the road safely immediately when the warning activates.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What is the function of anti-lock brakes (ABS)?
- A. They completely prevent skids in all conditions
- B. They replace the need for safe following distances
- C. They prevent wheel lockup during hard braking, allowing the driver to steer while stopping
- D. They automatically apply when the driver is distracted
Answer and explanation
Correct answer: They prevent wheel lockup during hard braking, allowing the driver to steer while stopping
ABS prevents wheel lockup during hard or emergency braking, allowing the driver to maintain steering control. ABS does not reduce stopping distance — it allows steering while braking. ABS does not compensate for speed or following distance errors.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What should you do when the ABS warning light stays on after you start driving?
- A. Report it — the ABS may not be functioning, though standard brakes still work
- B. Nothing — ABS lights always stay on
- C. Stop immediately — the vehicle is unsafe
- D. Increase your speed to reset the system
Answer and explanation
Correct answer: Report it — the ABS may not be functioning, though standard brakes still work
If the ABS warning light stays on after startup or comes on while driving, the ABS may not be functioning properly. Standard braking still works, but report the issue to your maintenance department as soon as possible.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Where should you NOT refuel a vehicle carrying hazardous materials?
- A. Near open flames, sparks, or in enclosed spaces — fire risk is extreme
- B. During daylight hours only
- C. On interstate highways
- D. At truck stops only
Answer and explanation
Correct answer: Near open flames, sparks, or in enclosed spaces — fire risk is extreme
Never refuel near open flames, lit cigarettes, or in enclosed spaces when carrying hazardous materials. The risk of fire or explosion is severe. Follow all fueling safety protocols including grounding the vehicle when required.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When passing another vehicle on a two-lane road, you should:
- A. Only pass when you can see clearly and have enough room to complete the pass safely before any oncoming traffic arrives
- B. Pass in no-passing zones if the road looks clear
- C. Flash your lights to warn the vehicle being passed
- D. Pass at the same speed as the vehicle you are passing
Answer and explanation
Correct answer: Only pass when you can see clearly and have enough room to complete the pass safely before any oncoming traffic arrives
Only pass when visibility is clear in both directions and you have enough room to complete the entire pass and return to your lane before any approaching traffic arrives. Large trucks take much longer to pass than passenger cars.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
How should you respond when another driver tries to pass your large truck?
- A. Slow down slightly to help them complete the pass safely
- B. Honk your horn
- C. Move to the shoulder
- D. Speed up so they cannot complete the pass
Answer and explanation
Correct answer: Slow down slightly to help them complete the pass safely
When being passed, slow down slightly to help the other driver complete the pass more quickly and safely. This shortens the time they are in the opposing lane and reduces the hazard to everyone.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Your vehicle's horn should be used:
- A. Frequently to alert other drivers of your presence
- B. Whenever you enter an intersection
- C. Whenever changing lanes on Florida highways
- D. Sparingly, as a warning only when necessary for safety
Answer and explanation
Correct answer: Sparingly, as a warning only when necessary for safety
The horn is a safety warning device. Use it sparingly and only when necessary — such as when another driver appears about to enter your lane. Unnecessary horn use is both ineffective and can startle other drivers dangerously.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Turn signals should be used:
- A. Only at night
- B. Only on two-lane roads
- C. At least 100 feet before turning or changing lanes in urban areas, 200 feet on higher-speed roads
- D. Only when other vehicles are present
Answer and explanation
Correct answer: At least 100 feet before turning or changing lanes in urban areas, 200 feet on higher-speed roads
Florida law requires turn signals at least 100 feet before turning in urban areas (30 mph or less) and 200 feet in other areas. For CMVs, signaling early gives other drivers more time to react to your larger vehicle's movement.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
At a four-way stop, the right-of-way goes to:
- A. The vehicle turning left
- B. The largest vehicle
- C. The vehicle with the most cargo
- D. The vehicle that arrives first — if two arrive simultaneously, the vehicle on the right has priority
Answer and explanation
Correct answer: The vehicle that arrives first — if two arrive simultaneously, the vehicle on the right has priority
At a four-way stop: the first vehicle to arrive goes first. If two vehicles arrive at the same time, the vehicle on the right has the right of way. Vehicles going straight have priority over vehicles turning.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What is the 'No-Zone' behind a large truck?
- A. At least 30 feet behind the rear of the truck, where the driver cannot see you in mirrors
- B. The area within 10 feet
- C. The area 100 feet behind
- D. The area under the trailer
Answer and explanation
Correct answer: At least 30 feet behind the rear of the truck, where the driver cannot see you in mirrors
Following a large truck within 30 feet of its rear puts you in the driver's blind spot. They cannot see you. Additionally, if the truck brakes suddenly, you have no time to react. Stay back at least 30 feet — ideally much more.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When approaching an intersection with a green light, you should:
- A. Speed up to clear the intersection quickly
- B. Honk to warn cross traffic
- C. Cover the brake and be prepared for cross traffic that may run the red light
- D. Proceed without slowing since you have the right of way
Answer and explanation
Correct answer: Cover the brake and be prepared for cross traffic that may run the red light
Even with a green light, be prepared for vehicles running red lights, especially in Florida where intersection crashes are common. Cover your brake and scan for cross traffic before fully committing to the intersection.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Florida's Move Over Law (F.S. 316.126) requires drivers to:
- A. Only applies on interstates, not on state roads
- B. Only slow down — lane changes are optional
- C. Only move over for law enforcement vehicles
- D. Move over one lane away from stopped emergency vehicles, law enforcement, tow trucks, sanitation workers, and disabled vehicles with hazard lights flashing — or reduce speed significantly if unable to change lanes
Answer and explanation
Correct answer: Move over one lane away from stopped emergency vehicles, law enforcement, tow trucks, sanitation workers, and disabled vehicles with hazard lights flashing — or reduce speed significantly if unable to change lanes
Florida's Move Over Law is among the most comprehensive in the US. It covers law enforcement, emergency responders, tow trucks, utility workers, and any disabled vehicle displaying hazard lights. Violations carry significant fines. CDL drivers must know and follow this law.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Florida has a large commercial vehicle presence due to which industries?
- A. Agriculture, tourism, port cargo (Port of Miami, Port Tampa Bay), and e-commerce distribution
- B. Mining and timber only
- C. Oil drilling only
- D. Manufacturing only
Answer and explanation
Correct answer: Agriculture, tourism, port cargo (Port of Miami, Port Tampa Bay), and e-commerce distribution
Florida's trucking industry is driven by citrus and produce agriculture, tourism supply chains, massive port activity at Miami and Tampa Bay, and a booming distribution sector serving Florida's 22+ million residents. CDL drivers are in high demand across all these sectors.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Which Florida statute governs CDL disqualifications for serious traffic violations?
- A. Florida Statute 320.01
- B. Florida Statute 316.515
- C. Florida Statute 316.302
- D. Florida Statute 322.61
Answer and explanation
Correct answer: Florida Statute 322.61
Florida Statute 322.61 governs CDL disqualifications. It establishes the offenses that result in CDL disqualification, the periods of disqualification, and the conditions for reinstatement. Understanding your rights and obligations under this statute is important for every Florida CDL holder.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
The FMCSA Drug and Alcohol Clearinghouse affects Florida CDL holders because:
- A. It only applies to interstate drivers
- B. Since November 18, 2024 (Clearinghouse II), Florida DMV must downgrade a CDL for unresolved Prohibited violations
- C. It only tracks state traffic violations
- D. Florida opted out of the Clearinghouse program
Answer and explanation
Correct answer: Since November 18, 2024 (Clearinghouse II), Florida DMV must downgrade a CDL for unresolved Prohibited violations
Under Clearinghouse Phase II (effective November 18, 2024), Florida DMV is required to downgrade a driver's CDL when they have an unresolved Prohibited violation in the FMCSA Drug and Alcohol Clearinghouse. A positive drug test or refusal can now cost you your Florida CDL, not just your current job.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What should a Florida CDL driver do if they are selected for a random drug or alcohol test?
- A. Only comply during regular business hours
- B. Report immediately for testing — refusing counts as a positive result
- C. Request to delay until they feel better
- D. Ask for a second supervisor's approval
Answer and explanation
Correct answer: Report immediately for testing — refusing counts as a positive result
When selected for a random DOT drug or alcohol test, report immediately. Refusal to test is treated the same as a positive result, resulting in Clearinghouse violation, immediate removal from safety-sensitive duties, and the full return-to-duty process.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
On Florida roads, a vehicle combination exceeding 80,000 lbs gross weight requires:
- A. A commercial driver's license only
- B. An overweight permit from the Florida Department of Transportation (FDOT)
- C. Nothing additional if the driver has a Class A CDL
- D. Approval from the county where it will travel
Answer and explanation
Correct answer: An overweight permit from the Florida Department of Transportation (FDOT)
Any vehicle combination exceeding 80,000 lbs gross vehicle weight on Florida roads requires an overweight/oversize permit from FDOT. The permit specifies approved routes, travel times, and escort requirements.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Under federal law, which type of accident must be reported to the FMCSA?
- A. Any accident involving a CMV
- B. Only accidents with injuries
- C. Only accidents on interstate highways
- D. Accidents involving a fatality, injury requiring treatment away from the scene, or disabling vehicle damage
Answer and explanation
Correct answer: Accidents involving a fatality, injury requiring treatment away from the scene, or disabling vehicle damage
Reportable accidents under federal definition: a fatality, an injury requiring immediate medical treatment away from the scene, or one or more vehicles towed from the scene (disabling damage). These require post-accident drug and alcohol testing within specific timeframes.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
A first offense DUI while operating a CMV in Florida results in a CDL disqualification of:
- A. 5 years
- B. 1 year — 3 years if transporting hazardous materials
- C. 30 days
- D. 6 months
Answer and explanation
Correct answer: 1 year — 3 years if transporting hazardous materials
A first DUI offense while driving a CMV results in a 1-year CDL disqualification — or 3 years if the CMV was transporting hazardous materials requiring placards. A second offense results in lifetime disqualification.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
For a first conviction of using a CMV to commit an ordinary felony, excluding the lifetime offenses and placarded-hazmat provision, what is the federal disqualification?
- A. Lifetime — no exceptions
- B. 5 years then eligible for reinstatement
- C. 3 years
- D. At least 1 year
Answer and explanation
Correct answer: At least 1 year
The ordinary first CMV-felony conviction has a one-year federal disqualification. The table has separate provisions for specified controlled-substance felonies and severe human trafficking, and a longer ordinary period for the applicable hazardous-materials case. These exclusions are essential to the answer; not every first felony has the same period.
Source: https://www.ecfr.gov/current/title-49/section-383.51
Under the federal CDL table, what minimum disqualification follows a second serious-traffic-violation conviction in a separate CMV incident within three years?
- A. 3 years
- B. 6 months to 1 year
- C. 30 days
- D. 60 days
Answer and explanation
Correct answer: 60 days
Section 383.51(c) requires the convictions to arise from separate incidents within three years. The second qualifying CMV conviction carries 60 days; a third or subsequent qualifying conviction within that period carries 120 days. Two citations from a single incident do not establish the stated two-incident trigger. Additional state penalties are not resolved here.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Why is it important for a CMV driver to know the height of their vehicle?
- A. For GPS accuracy
- B. To avoid striking low bridges, overpasses, and tunnels that could cause catastrophic damage
- C. For insurance documentation
- D. For weight station calculations
Answer and explanation
Correct answer: To avoid striking low bridges, overpasses, and tunnels that could cause catastrophic damage
Know your vehicle's height and know the clearance of every bridge and overpass on your route. Striking a bridge with an oversized vehicle can destroy the vehicle, injure or kill the driver, and cause the bridge to collapse. Always verify clearance before entering.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
A 'pre-selector' or 'range selector' on a large truck transmission:
- A. Controls the air pressure
- B. Allows the driver to pre-select a high or low range before reaching the range gate
- C. Controls the engine temperature
- D. Is the same as a parking brake
Answer and explanation
Correct answer: Allows the driver to pre-select a high or low range before reaching the range gate
A range selector (or pre-selector) on transmissions with multiple ranges allows the driver to select the desired range before reaching the range shift point. Using this feature correctly provides smooth, efficient shifting through all available gears.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When a CMV driver is involved in an accident requiring drug testing, the blood alcohol test must be completed within:
- A. 12 hours
- B. 2 hours
- C. 24 hours
- D. 8 hours
Answer and explanation
Correct answer: 8 hours
Post-accident alcohol testing must be completed within 8 hours of the accident. If not completed within 8 hours, the employer must document why. Drug testing must be completed within 32 hours. After either deadline passes, testing is no longer required.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Coolant level should be checked:
- A. Only by pressing the cap to see if steam escapes
- B. While the engine is running
- C. Only when the engine is cold — never open a hot radiator cap
- D. Only at oil change intervals
Answer and explanation
Correct answer: Only when the engine is cold — never open a hot radiator cap
Never open a hot radiator cap — pressurized hot coolant can spray and cause severe burns. Check coolant level only when the engine is cold. Many vehicles have overflow tanks that can be checked when warm, but the radiator cap itself should only be removed when cold.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What does a 'low battery' warning indicate in a CMV?
- A. The battery is not holding a charge or the charging system is not working properly
- B. Only relevant for electric vehicles
- C. A normal condition for cold weather
- D. The alternator is overcharging
Answer and explanation
Correct answer: The battery is not holding a charge or the charging system is not working properly
A low battery warning indicates the battery is not receiving adequate charge (charging system failure) or the battery itself is failing. Without a functioning charging system, the vehicle's electrical systems — including lights and instruments — will eventually fail.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
The danger of 'dolly welding' or coupling a trailer with a faulty fifth wheel is:
- A. Increased tire wear
- B. The trailer may separate from the tractor while in motion, creating an uncontrolled trailer
- C. Reduced fuel efficiency
- D. Reduced cargo capacity
Answer and explanation
Correct answer: The trailer may separate from the tractor while in motion, creating an uncontrolled trailer
A faulty fifth wheel or improper coupling can cause trailer separation while driving. A runaway trailer can cross into oncoming traffic, strike other vehicles, or cause massive highway incidents. Always perform proper coupling procedures and verify the coupling is secure.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What is the maximum number of tie-downs required for cargo up to 10 feet long?
- A. Four tie-downs
- B. Three tie-downs
- C. One tie-down
- D. Two tie-downs
Answer and explanation
Correct answer: Two tie-downs
FMCSA cargo securement rules (49 CFR Part 393) require a minimum of two tie-downs for cargo up to 10 feet in length. Additional tie-downs are required for longer cargo: one additional for each additional 10 feet of length.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Which of the following is true about using a cell phone while driving a CMV in Florida?
- A. Hand-held cell phone use while driving a CMV is prohibited under federal FMCSA regulations and Florida law
- B. Using a phone at red lights is permitted
- C. Hands-free use is acceptable
- D. Only prohibited on interstate highways
Answer and explanation
Correct answer: Hand-held cell phone use while driving a CMV is prohibited under federal FMCSA regulations and Florida law
FMCSA prohibits CMV drivers from using hand-held mobile phones while driving. Violations result in fines up to $2,750 for drivers and up to $11,000 for employers who require or allow the use. Florida state law also bans hand-held device use while driving.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Texting while driving a CMV is:
- A. Prohibited at all times, including at traffic lights and stop signs
- B. Permitted if using voice-to-text
- C. Only prohibited at speeds over 25 mph
- D. Permitted at stops only
Answer and explanation
Correct answer: Prohibited at all times, including at traffic lights and stop signs
FMCSA prohibits texting while driving a CMV at any time — including at red lights and stop signs. Texting requires the driver's eyes, hands, and mental attention simultaneously — making it among the most dangerous distractions for a CMV operator.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When approaching a school bus with flashing red lights that is stopped on a Florida road, you must:
- A. Stop — unless you are on a divided highway with a physical barrier between you and the bus
- B. Only stop on two-lane roads
- C. Only stop if children are visible
- D. Slow to 15 mph and proceed with caution
Answer and explanation
Correct answer: Stop — unless you are on a divided highway with a physical barrier between you and the bus
Florida law requires all vehicles to stop when a school bus is stopped with flashing red lights and extended stop arm, UNLESS you are on a divided highway (with a physical median) traveling in the opposite direction. Violations result in severe fines and license points.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When merging onto a Florida highway, a CMV driver should:
- A. Always have the right of way
- B. Use the horn to alert drivers to your merge
- C. Stop at the end of the ramp and wait for a gap
- D. Adjust speed to match traffic flow and merge smoothly when a safe gap exists
Answer and explanation
Correct answer: Adjust speed to match traffic flow and merge smoothly when a safe gap exists
Match your speed to highway traffic, find a safe gap, and merge smoothly. Do not stop at the end of a ramp unless absolutely necessary — a stopped large vehicle in a merge zone is extremely dangerous to approaching traffic.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What is 'road rage' and how should a CDL driver respond if they encounter it?
- A. Only applies to non-commercial drivers
- B. A Florida traffic law violation only
- C. Aggressive driving behavior by others — do not respond aggressively, increase space, and avoid eye contact
- D. Normal competitive driving — respond in kind
Answer and explanation
Correct answer: Aggressive driving behavior by others — do not respond aggressively, increase space, and avoid eye contact
Road rage is aggressive or violent driving behavior. CDL drivers must not engage — it escalates situations and puts everyone at risk. Increase distance, avoid eye contact, do not gesture or retaliate, and contact law enforcement if threatened.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
In Florida work zones, CDL drivers must:
- A. Reduce speed to the posted work zone speed limit — fines double in work zones in Florida
- B. Maintain normal highway speed
- C. Only slow down when workers are visible
- D. Use work zones only during off-peak hours
Answer and explanation
Correct answer: Reduce speed to the posted work zone speed limit — fines double in work zones in Florida
Florida law doubles fines for speeding violations in work zones. CDL drivers must reduce speed to the posted work zone speed limit when signs are posted, whether or not workers are currently present. Excessive speed in work zones is a serious traffic violation for CDL purposes.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Florida's 'Super Load' category applies to loads exceeding:
- A. 150,000 lbs — requiring special FDOT routing and potentially escort vehicles
- B. 200,000 lbs
- C. 80,000 lbs
- D. 100,000 lbs
Answer and explanation
Correct answer: 150,000 lbs — requiring special FDOT routing and potentially escort vehicles
Loads exceeding 150,000 lbs GVW in Florida are classified as 'Super Loads' requiring special FDOT routing approval, engineering analysis, and often police escorts. These loads often must travel at night and avoid peak traffic periods.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What does it mean when your temperature gauge shows the engine is overheating?
- A. The engine oil is low
- B. The engine needs a tune-up
- C. The cooling system has a problem — pull over safely and shut down before serious engine damage occurs
- D. The outside temperature is too high
Answer and explanation
Correct answer: The cooling system has a problem — pull over safely and shut down before serious engine damage occurs
An overheating engine can seize and cause catastrophic damage within minutes. If the temperature gauge reaches the red zone: pull over safely, shut the engine off, and allow it to cool before inspecting. Never remove the radiator cap while the engine is hot.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What should you do if you become very sleepy while driving a CMV?
- A. Drive faster to reach your destination sooner
- B. Pull off the road safely and sleep — these are ineffective substitutes for sleep
- C. Drink coffee or energy drinks
- D. Open the windows and turn up the radio
Answer and explanation
Correct answer: Pull off the road safely and sleep — these are ineffective substitutes for sleep
If you feel dangerously drowsy, pull off at a safe location — rest area, truck stop, or parking area — and sleep. Opening windows and loud music provide temporary relief at best and mask a dangerous level of fatigue impairment.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Before transporting cargo, the driver is responsible for:
- A. Verifying the cargo's destination only
- B. Inspecting the cargo, ensuring it is properly secured, and ensuring the vehicle is not overloaded
- C. Only checking that doors are closed
- D. Only counting the number of items
Answer and explanation
Correct answer: Inspecting the cargo, ensuring it is properly secured, and ensuring the vehicle is not overloaded
The driver shares responsibility for cargo inspection and securement. Before driving, verify the cargo is properly loaded, secured, and does not exceed weight limits. Even if someone else loaded the cargo, the driver is responsible for its condition before departure.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
The term 'defensive driving' means:
- A. Using safety equipment like airbags
- B. Anticipating hazards before they develop and taking action to reduce risk before an emergency occurs
- C. Letting other vehicles go first at all times
- D. Driving aggressively to maintain your position in traffic
Answer and explanation
Correct answer: Anticipating hazards before they develop and taking action to reduce risk before an emergency occurs
Defensive driving means constantly scanning for potential hazards, anticipating what other drivers and road conditions might require, and taking preventive action. It is the foundation of professional commercial vehicle operation.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When checking the steering box during a pre-trip inspection, you should:
- A. Listen for sound while turning the wheel only
- B. Check that it is mounted securely with no leaks and no looseness in the steering shaft
- C. Check its color
- D. Check that it is clean
Answer and explanation
Correct answer: Check that it is mounted securely with no leaks and no looseness in the steering shaft
During pre-trip inspection of the steering system: ensure the steering gear box is securely mounted, no fluid leaks are visible, and the drag link, tie rods, and pitman arm are not loose or missing cotter pins. Any looseness in steering is a critical safety defect.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What is a 'cotter pin' and why is it important during pre-trip inspection?
- A. A tire pressure gauge component
- B. A type of fuel cap
- C. A small pin that prevents nuts from loosening on steering and suspension components
- D. Part of the fifth wheel locking mechanism
Answer and explanation
Correct answer: A small pin that prevents nuts from loosening on steering and suspension components
Cotter pins are safety devices that prevent castle nuts from vibrating loose on critical steering and suspension components. During pre-trip inspection, check that cotter pins are present and intact on all applicable joints. Missing cotter pins are a safety defect.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When inspecting coupling devices on a combination vehicle, you should check that:
- A. The fifth wheel is any color
- B. The fifth wheel is properly lubricated, the locking jaws are closed around the kingpin, and the release handle is in the locked position
- C. The trailer is any weight
- D. The coupling device is clean only
Answer and explanation
Correct answer: The fifth wheel is properly lubricated, the locking jaws are closed around the kingpin, and the release handle is in the locked position
Coupling inspection must confirm: fifth wheel is lubricated and mounted securely, jaws are fully closed around the kingpin (not just the shank), release handle is locked, and safety chains or cables are properly attached. These checks prevent catastrophic trailer separation.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What is the maximum amount a cargo net or strap can be used if it shows signs of damage?
- A. It can be used once more if the damage is minor
- B. Damaged securing devices should NOT be used — they may fail and must be replaced
- C. It can be used with reduced load
- D. It should be inspected by a mechanic first
Answer and explanation
Correct answer: Damaged securing devices should NOT be used — they may fail and must be replaced
Any damaged cargo securing device — strap, chain, net, or binder showing cuts, frays, corrosion, or deformation — must be removed from service immediately. A failed securing device under load can release cargo catastrophically.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
'Tailgating' a vehicle in front of you while driving a CMV is dangerous because:
- A. It is only illegal in school zones
- B. It saves fuel
- C. It only matters at highway speeds
- D. Your vehicle requires much more stopping distance than a passenger car — you cannot stop in time if the vehicle ahead brakes suddenly
Answer and explanation
Correct answer: Your vehicle requires much more stopping distance than a passenger car — you cannot stop in time if the vehicle ahead brakes suddenly
A fully loaded semi-truck at 65 mph requires approximately 400 feet or more to stop. Following too closely eliminates all reaction and stopping time. Rear-end collisions by large trucks are often fatal to occupants of the smaller vehicle.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When a CMV driver spots a hazard ahead, the correct order of response is:
- A. Signal first, then respond
- B. Brake, steer, communicate
- C. Accelerate away from the hazard
- D. Identify the hazard, decide on action, execute the action
Answer and explanation
Correct answer: Identify the hazard, decide on action, execute the action
The three-step hazard response: 1) Identify the hazard early by scanning ahead, 2) Decide what action to take (slow, steer, stop, communicate), 3) Execute the action smoothly and safely. Early identification gives you maximum time to respond.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What is the purpose of the truck's spring brakes?
- A. To provide extra stopping power on highways
- B. To hold the vehicle stationary when parked and to apply automatically if air pressure drops too low
- C. To supplement service brakes on downgrades only
- D. They replace service brakes entirely
Answer and explanation
Correct answer: To hold the vehicle stationary when parked and to apply automatically if air pressure drops too low
Spring brakes serve two functions: they hold the vehicle stationary when parked (parking brake function) and they automatically apply when air pressure drops below approximately 20-45 psi (fail-safe function). They apply by spring force and must be released by air pressure.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
A Florida CDL holder must report any conviction in any state within 30 days to:
- A. Only to their employer
- B. Both their employer AND the state that issued their CDL (FLHSMV)
- C. Only to FLHSMV
- D. Only to the state where the conviction occurred
Answer and explanation
Correct answer: Both their employer AND the state that issued their CDL (FLHSMV)
Federal regulations (49 CFR Part 383.31) require CDL holders to report ALL convictions (in any vehicle, in any state) within 30 days to their employer, and within 30 days to the state that issued their CDL. Failure to report is itself a violation.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When must cargo be covered with a tarp on a flatbed in Florida?
- A. When required to prevent cargo from escaping the vehicle — Florida law and federal regs require this for many loads
- B. Only on interstate highways
- C. Only when transporting sand or gravel
- D. Only when carrying loads over 20,000 lbs
Answer and explanation
Correct answer: When required to prevent cargo from escaping the vehicle — Florida law and federal regs require this for many loads
Florida law and FMCSA regulations require cargo to be covered when the material could blow or fall off the vehicle. Loads of gravel, sand, chips, and similar materials must be covered. Unsecured loads that fall and cause damage or injury carry serious civil and criminal liability.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
In Florida, agricultural vehicles carrying Florida-grown produce traveling within the state may be exempt from some federal HOS rules under:
- A. Only if carrying citrus products
- B. The agricultural exemption — allowing operation within a 150-air-mile radius without ELD and HOS requirements
- C. No exemptions exist for agricultural vehicles
- D. Only during harvest season with a special FDOT permit
Answer and explanation
Correct answer: The agricultural exemption — allowing operation within a 150-air-mile radius without ELD and HOS requirements
The federal agricultural exemption allows drivers transporting agricultural commodities within a 150-air-mile radius from the source during harvest to operate without ELD and standard HOS requirements. Florida's large agricultural sector means many CDL drivers use this exemption.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Which of the following defects would NOT put a vehicle out of service during a roadside inspection?
- A. Cracked brake drums
- B. Brake adjustment out of spec
- C. A missing lug nut
- D. A dirty windshield that does not block the driver's view
Answer and explanation
Correct answer: A dirty windshield that does not block the driver's view
A dirty windshield that does not obstruct the driver's view is not a safety defect that would place the vehicle out of service, though it should be cleaned at the next opportunity. Missing lug nuts, brake defects, and cracked brake drums are all out-of-service violations.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When approaching a toll booth in Florida as a CMV operator, you should:
- A. CMV operators are exempt from Florida tolls
- B. Maintain highway speed through SunPass lanes only
- C. Use any toll lane available
- D. Slow down well in advance, follow weight and height limits posted for truck lanes, and use designated commercial vehicle lanes where available
Answer and explanation
Correct answer: Slow down well in advance, follow weight and height limits posted for truck lanes, and use designated commercial vehicle lanes where available
Many Florida toll facilities have specific lanes for commercial vehicles. Approach toll booths at reduced speed, watch for height restrictions, and use designated truck lanes. Florida's Turnpike system has commercial vehicle lanes at most plazas.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What Florida road feature requires special attention from CMV drivers in South Florida and near ports?
- A. Drawbridges — CMV operators must know clearances and be prepared to stop for bridge openings
- B. Unpaved county roads
- C. Mountain passes
- D. High-elevation passes
Answer and explanation
Correct answer: Drawbridges — CMV operators must know clearances and be prepared to stop for bridge openings
South Florida and coastal areas have numerous drawbridges. CMV drivers must know their vehicle's height (maximum 13'6" for most), observe all bridge clearance signs, and be prepared to stop when a drawbridge opens. Striking a bridge or being caught during an opening creates serious hazards.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
The 'Statewide Contracted Commercial Motor Vehicle Skill Test Sites' in Florida refers to:
- A. FLHSMV office locations
- B. County DMV locations that administer CDL tests
- C. The network of FLHSMV-approved private third-party testing facilities where ALL Florida CDL skills tests are conducted
- D. Federal facilities that test CDL applicants
Answer and explanation
Correct answer: The network of FLHSMV-approved private third-party testing facilities where ALL Florida CDL skills tests are conducted
Florida is unique in that CDL skills tests are NOT administered at FLHSMV offices — ALL skills tests are conducted at FLHSMV-contracted third-party testing facilities. These private testers set their own fees ($150-$700). The complete list is maintained at flhsmv.gov.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What is a 'non-domiciled CDL' and what happened to it in Florida in 2026?
- A. A special CDL for Florida residents only — unchanged in 2026
- B. A CDL for out-of-state trucking companies — no change in 2026
- C. A CDL for non-U.S. citizens or non-Florida residents; Florida suspended it, then resumed May 13, 2026, restricted to H-2A, H-2B, and E-2 visa holders per new FMCSA rules
- D. A CDL for drivers who do not live in Florida — it was permanently eliminated
Answer and explanation
Correct answer: A CDL for non-U.S. citizens or non-Florida residents; Florida suspended it, then resumed May 13, 2026, restricted to H-2A, H-2B, and E-2 visa holders per new FMCSA rules
Florida temporarily suspended non-domiciled CDL issuance, then resumed on May 13, 2026. Under new FMCSA rules (effective March 16, 2026), non-domiciled CDLs are now only available to H-2A agricultural workers, H-2B non-agricultural workers, and E-2 treaty investor visa holders.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
A Florida CDL driver operating in an agricultural hauling context within 150 air miles of the source must still comply with:
- A. Safety regulations including CDL requirements, vehicle weight limits, and inspection requirements — only HOS and ELD rules may be waived under the agricultural exemption
- B. All HOS regulations without exception
- C. Only state regulations, not federal
- D. No regulations at all during harvest
Answer and explanation
Correct answer: Safety regulations including CDL requirements, vehicle weight limits, and inspection requirements — only HOS and ELD rules may be waived under the agricultural exemption
The agricultural exemption waives certain HOS and ELD requirements but does NOT waive CDL requirements, vehicle safety standards, weight limits, or hazmat regulations. Agricultural exemption drivers must still have a valid CDL and comply with all other applicable regulations.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Why should a CMV driver in Florida check for alligators and wildlife near rural roads?
- A. Only motorcycles need to watch for wildlife
- B. Wildlife creates no hazard for large trucks
- C. Only relevant in designated wildlife zones
- D. Large animals on or near the road can cause accidents — swerving to avoid them at highway speed can cause loss of control of a CMV
Answer and explanation
Correct answer: Large animals on or near the road can cause accidents — swerving to avoid them at highway speed can cause loss of control of a CMV
Florida has abundant wildlife including alligators, deer, and other large animals that frequently cross rural roads. At highway speed, striking a large animal can cause damage and loss of control. Swerving sharply to avoid an animal at speed can cause a CMV rollover — sometimes a worse outcome than striking the animal.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What is the purpose of 'interaxle differential lock' (also known as a differential lock or 'diff lock')?
- A. It locks the parking brake on downhill grades
- B. It prevents the trailer from swaying
- C. It locks the transmission in one gear
- D. It forces both drive axles to rotate at the same speed, improving traction in slippery conditions
Answer and explanation
Correct answer: It forces both drive axles to rotate at the same speed, improving traction in slippery conditions
The differential lock (interaxle lock or diff lock) forces all drive axles to rotate together, improving traction when one or more wheels are on a slippery surface. It should ONLY be engaged in slippery conditions and must be DISENGAGED before returning to normal driving — it can cause drivetrain damage on dry surfaces.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Hydraulic brakes can fail due to:
- A. Air in the hydraulic lines, loss of fluid, or brake overheating causing brake fade
- B. Only occur on vehicles over 40,000 lbs
- C. Excess brake fluid only
- D. High air pressure
Answer and explanation
Correct answer: Air in the hydraulic lines, loss of fluid, or brake overheating causing brake fade
Hydraulic brake failures include: loss of fluid (leak), air in the lines (sponginess), or heat-induced brake fade on long downgrades. Unlike air brakes, hydraulic brakes have no backup air system — a complete hydraulic failure results in total loss of service brakes.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When parking a CMV on a downgrade, you should:
- A. Turn the front wheels toward the curb (or shoulder) AND set parking brake, AND chock wheels if possible
- B. Set the parking brake only
- C. Park in neutral only
- D. Only chock the rear wheels
Answer and explanation
Correct answer: Turn the front wheels toward the curb (or shoulder) AND set parking brake, AND chock wheels if possible
On a downgrade: set the parking brake, chock the wheels, and turn front wheels toward the curb or shoulder. This way, if the parking brake fails, the wheels will hit the curb and stop the vehicle rather than allowing it to roll into traffic.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When parking a CMV facing uphill (on an upgrade), the front wheels should be turned:
- A. Does not matter if the parking brake is set
- B. Away from the curb — so if the vehicle rolls back, wheels contact the curb
- C. Straight ahead
- D. Toward the curb
Answer and explanation
Correct answer: Away from the curb — so if the vehicle rolls back, wheels contact the curb
On an upgrade: turn front wheels away from the curb. If the parking brake fails and the vehicle rolls backward, the wheel will catch the curb edge and stop the vehicle. This is the opposite of downgrade parking technique.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Which of these is required when a CMV transports hazardous materials?
- A. The driver must have a hazmat endorsement on their CDL only if transporting Class 1 explosives
- B. Only a Class A CDL is required
- C. Only the carrier needs to be certified — the driver does not need an endorsement
- D. The driver needs a hazmat endorsement for ALL hazmat quantities requiring placards
Answer and explanation
Correct answer: The driver needs a hazmat endorsement for ALL hazmat quantities requiring placards
A driver must have a hazmat endorsement on their CDL to transport hazardous materials in quantities requiring placards. The endorsement requires passing a knowledge test and a TSA security threat assessment (background check).
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When should you use your four-way flashers (hazard lights) while driving a CMV in Florida?
- A. Whenever it is raining
- B. At all times while driving to warn other vehicles
- C. Whenever you are on an interstate
- D. Only when stopped or moving significantly slower than surrounding traffic (slow-moving vehicle) — Florida law governs use
Answer and explanation
Correct answer: Only when stopped or moving significantly slower than surrounding traffic (slow-moving vehicle) — Florida law governs use
Florida law permits hazard lights use when stopped or when driving significantly below the speed limit (as a slow-moving vehicle warning). Unnecessary hazard light use while driving at normal speed can confuse other drivers. Always check Florida law for specific restrictions.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What does the term 'gross combination weight rating' (GCWR) mean?
- A. Only the trailer weight plus cargo
- B. The weight of the tractor only
- C. The maximum combined weight of the tractor, trailer, and maximum cargo, as rated by the manufacturer
- D. The actual current weight of the loaded combination
Answer and explanation
Correct answer: The maximum combined weight of the tractor, trailer, and maximum cargo, as rated by the manufacturer
GCWR is the manufacturer's maximum rated weight for a combination vehicle — including the tractor, all trailers, and maximum payload. A Class A CDL is required when the GCWR exceeds 26,001 lbs with a towed vehicle over 10,000 lbs.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What warning should concern you most during a pre-trip inspection?
- A. The smell of fuel or burning, visible smoke, or hydraulic fluid leaks
- B. Windshield wipers that leave small streaks
- C. A small scratch on the cab
- D. A slightly dirty windshield
Answer and explanation
Correct answer: The smell of fuel or burning, visible smoke, or hydraulic fluid leaks
Fuel smell, burning odors, smoke, or hydraulic fluid leaks indicate serious problems that could lead to fire, brake failure, or engine failure. These are immediate out-of-service conditions that must be corrected before operating the vehicle.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Which type of cargo requires special permits in Florida due to its size regardless of its weight?
- A. Oversize loads — vehicles or loads exceeding 8'6" wide, 13'6" tall, or 75' long (for combinations) require FDOT oversize permits
- B. Any cargo over 10 tons
- C. Refrigerated goods
- D. Fresh produce
Answer and explanation
Correct answer: Oversize loads — vehicles or loads exceeding 8'6" wide, 13'6" tall, or 75' long (for combinations) require FDOT oversize permits
Florida requires oversize permits from FDOT for loads exceeding: 8'6" in width, 13'6" in height, or 75' in overall length for combination vehicles. These permits specify approved routes, time restrictions, and escort requirements.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When should you NOT attempt to exceed your vehicle's rated speed?
- A. Only when fully loaded
- B. Only on curves
- C. Never — operating above rated speed damages the vehicle and is unsafe regardless of posted limits
- D. Only on wet roads
Answer and explanation
Correct answer: Never — operating above rated speed damages the vehicle and is unsafe regardless of posted limits
Never exceed your vehicle's rated maximum speed. Exceeding rated speed creates excessive tire heat and increases blowout risk, reduces brake effectiveness, and can cause structural damage to the vehicle. Tires are rated for specific maximum speeds.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When is it illegal to pass in Florida?
- A. Only in school zones
- B. Only at night
- C. In no-passing zones (solid yellow line on your side), on hills or curves with limited visibility, near railroad crossings, and in intersections
- D. Only when traffic is heavy
Answer and explanation
Correct answer: In no-passing zones (solid yellow line on your side), on hills or curves with limited visibility, near railroad crossings, and in intersections
Florida law prohibits passing: where solid yellow lines are on your side, within 100 feet of railroad crossings, in intersections, on hills or curves where you cannot see 500 feet ahead, and in school zones. Passing in these areas is illegal and extremely dangerous in a large vehicle.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What does a flashing yellow light at an intersection mean?
- A. Stop completely and wait for a green light
- B. Proceed with caution — slow down and be prepared to stop if necessary
- C. The same as a solid red light
- D. Full speed ahead — you have the right of way
Answer and explanation
Correct answer: Proceed with caution — slow down and be prepared to stop if necessary
A flashing yellow light means proceed with caution. Slow down, be alert for cross traffic, and be prepared to stop. This signal is often used at intersections where cross traffic has a flashing red (must stop before proceeding).
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
When driving in Florida during an active tropical storm or hurricane warning, a CDL driver should:
- A. Only stop if ordered by law enforcement
- B. Continue driving if the wind is under 60 mph
- C. Follow FDOT evacuation route guidance, pull off the road safely if conditions become dangerous, and monitor NOAA weather broadcasts
- D. Drive faster to get out of the storm's path
Answer and explanation
Correct answer: Follow FDOT evacuation route guidance, pull off the road safely if conditions become dangerous, and monitor NOAA weather broadcasts
Florida's hurricane season (June-November) presents unique hazards for CMV operators. High winds can topple high-profile trailers at speeds well below hurricane force. Follow official guidance, monitor weather, and pull off the road safely if conditions deteriorate.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
Federal regulations require CMV operators to keep their ELD (Electronic Logging Device) records available for inspection for:
- A. 24 hours
- B. 7 days for current ELD data, plus 6 months of previous records kept by the carrier
- C. 30 days only
- D. 3 months only
Answer and explanation
Correct answer: 7 days for current ELD data, plus 6 months of previous records kept by the carrier
ELD regulations require current and last 7 days of ELD records to be available for inspection at roadside. The carrier must keep 6 months of records. Drivers must be able to transfer ELD data to law enforcement during inspections.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf
What is the most common cause of large truck rollover accidents?
- A. Improperly parked trucks
- B. Driving too fast for conditions — particularly on curves, ramps, and when making turns with high-profile trailers
- C. Tire blowouts only
- D. Mechanical failure
Answer and explanation
Correct answer: Driving too fast for conditions — particularly on curves, ramps, and when making turns with high-profile trailers
Speed-related causes — particularly excessive speed for curves, on-ramps, and sharp turns — are the leading factor in large truck rollovers. High-profile trailers have a high center of gravity. Always slow to below the curve's advisory speed, which was designed for passenger cars and is already lower than safe for large trucks.
Source: https://www.flhsmv.gov/pdf/handbooks/englishcdlhandbook.pdf

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Florida General Knowledge CDL Practice Test

What is the first step of the vehicle inspection routine for a Florida CDL driver?

Study all 175 questions and explanations

What is the first step of the vehicle inspection routine for a Florida CDL driver?

During a pre-trip inspection, you should check that the oil level is:

What should you do if you discover a defect that makes the vehicle unsafe during a pre-trip inspection?

How often are drivers required to complete a Driver Vehicle Inspection Report (DVIR)?

When checking your tires during a pre-trip inspection, the minimum tread depth for front tires is:

During a pre-trip inspection, you notice one lug nut is missing from a wheel. You should:

What does it mean if your steering wheel has more than 10 degrees of play?

Which of the following should you check when inspecting your mirrors?

During a pre-trip inspection of the engine compartment, you should check for:

What should you check when inspecting the exhaust system?

When backing a large truck, you should:

What is the purpose of 'off-tracking' knowledge when driving a large vehicle?

When making a right turn with a large truck, you should:

Smooth steering when driving a large truck is important because:

Why should you not brake hard when your drive wheels begin to skid?

What is the safest way to recover from a drive wheel skid?

On a downgrade, you should select the proper gear:

What is meant by 'stab braking'?

When driving through curves, the correct technique is to:

Which of the following is the most important thing to do when a tire blows out?

When should you downshift?

What is 'double clutching'?

If you miss a gear while going uphill, you should:

Retarders are used to:

When should you turn retarders off?

How far ahead should you be looking when driving at highway speeds?

Large trucks have blind spots called 'No-Zones.' Which of the following is a No-Zone?

How often should you check your mirrors when driving?

At an intersection where traffic signals are blocked, you should:

When you are driving and you see a pedestrian with a white cane, this means:

The posted speed limit for a large commercial vehicle in Florida on an interstate highway is:

Speed should be reduced when:

Hydroplaning occurs when:

Which road surfaces are most likely to be slippery?

The braking distance for a large truck at 55 mph under ideal conditions is approximately:

The minimum following distance for a large truck traveling at 55 mph in good conditions is:

When another vehicle cuts in front of your truck, what is the correct response?

What is the purpose of a 'space cushion' around your vehicle?

Under which condition should you increase your following distance?

How much overhead clearance does a large truck typically need?

When should you use high beams?

What is 'over-driving your headlights'?

Fatigue is a greater hazard at night because:

When meeting oncoming vehicles with bright headlights at night, you should:

When driving at night, you should reduce your speed because:

When driving in heavy fog, you should:

In Florida, sudden heavy rainstorms called 'Florida rain events' can reduce visibility to near zero. What should you do?

When driving in high wind conditions, which loads are most affected?

If your vehicle starts to skid sideways on a slippery road, you should:

Which of the following is true about driving through water on Florida roadways?

If your engine catches fire, you should:

If your brakes fail on a downgrade, what is your best option?

A tire blowout on a front wheel is especially dangerous because:

When an accident occurs and you are the driver, your first priority is:

You should use your horn when:

The maximum legal gross vehicle weight on most Florida interstate highways is:

What is the purpose of cargo blocking and bracing?

How should you adjust your driving when carrying a heavy load?

Which of the following is true about cargo securement?

When should you check your cargo during a trip?

For a non-exempt federal property-carrying driver, the break trigger is how many cumulative hours of driving without a thirty-minute interruption?

Under the ordinary federal property-carrying HOS rules, with no applicable exception, what is the driving-time limit after ten consecutive hours off duty?

A Florida CDL driver must have a minimum of how many consecutive hours off duty before driving again?

Which of the following is a sign of driver fatigue?

What is the best way to combat driver fatigue?

What should you do if you see a diamond-shaped placard on another vehicle indicating hazardous materials?

If you discover a hazardous materials leak from your cargo during a trip, you should:

Which of the following vehicles are NOT required to have hazmat placards?

After an accident in Florida, a CMV driver involved in a serious accident must:

Warning devices (triangles, flares) should be placed after an accident or breakdown:

In Florida, you can be disqualified from holding a CDL for:

Under Florida and federal law, how many valid driver's licenses may a CDL holder have?

How long does a Florida CDL remain valid before requiring renewal?

Within how many days must a Florida CDL driver notify their employer of a traffic violation (other than parking) in ANY vehicle?

A Commercial Learner's Permit (CLP) in Florida is valid for how long?

The minimum age to obtain a CDL in Florida for intrastate (Florida-only) commercial driving is:

Before receiving a Florida CDL, first-time applicants must: