North Carolina CDL Test Questions 2026: What to Expect
What to expect on North Carolina CDL knowledge testing in 2026: General Knowledge, Air Brakes, Combination Vehicles, the traffic-sign recognition test, passing standards, and retakes.
The North Carolina CDL written-testing process is broader than the three modules many practice sites focus on. Your CDL class and endorsements determine which commercial knowledge tests you need, and NCDMV also requires a vision screening and traffic-sign recognition as part of obtaining the commercial learner permit.
General Knowledge
Every CDL applicant needs the foundational commercial-driver material: vehicle inspection, basic control, safe driving, managing speed and space, cargo, emergencies, hazardous conditions, railroad crossings, and other material covered in the North Carolina Commercial Driver License Manual.
Air Brakes
Take the Air Brakes knowledge test if you intend to operate a CMV equipped with air brakes. The test covers system components, inspection, warning devices, spring brakes, braking technique, and failure conditions. Skipping the required test or testing in the wrong equipment can produce an air-brake restriction.
Combination Vehicles
Class A applicants need Combination Vehicles knowledge. Study coupling and uncoupling, combination inspections, trailer air systems, rollover and jackknife prevention, backing, and how longer combinations track through turns.
North Carolina traffic-sign recognition
This is the state-specific piece generic CDL practice can miss. North Carolina requires traffic-sign recognition in the permit process. You should be able to identify regulatory and warning signs from their color and shape and understand what action they require.
Passing score and attempts
North Carolina uses an 80% passing standard for CDL knowledge tests. State law also says the $51.50 commercial application fee entitles an applicant to three attempts to pass the written knowledge test before a new application fee is required. Treat those attempts as a limit, not as a study strategy.
Study from the manual, then use practice questions
Practice questions are useful for recall and weak-area detection, but the official North Carolina Commercial Driver License Manual is the source the test is built around. Study the manual sections for your license class and endorsements, then use practice tests to verify that you can apply the rules rather than recognize memorized answer patterns.
Official sources checked
NCDMV commercial driver license guidance, NCDMV school-bus CDL testing guidance for the 80% standard, North Carolina General Statutes §20-37.15, and the official North Carolina Commercial Driver License Manual. Last verified October 6, 2026.