CDL permit practice tests
Free, no sign-up. 275 questions, every answer explained.
Question of the day
- EXIT 1✓
General Knowledge
Required for every CDL class.
- EXIT 2✓
Air Brakes
Needed to drive any vehicle with air brakes, which covers most trucks and buses.
- EXIT 3✓
Combination Vehicles
Required for a Class A CDL (tractor-trailers).
- EXIT 4✓
Hazardous Materials
For the H endorsement. Also requires a TSA background check.
- EXIT 5✓
Tank Vehicles
For the N endorsement, needed to haul liquids or gases in bulk.
- EXIT 6✓
Doubles and Triples
For the T endorsement, needed to pull two or three trailers.
- EXIT 7✓
Passenger Vehicles
For the P endorsement, needed to drive buses with 16 or more people including the driver.
- EXIT 8✓
School Bus
For the S endorsement, needed to drive a school bus. You'll also need the Passenger (P) endorsement.
Find your state
Every state uses the same federal knowledge tests, with its own fees, offices and paperwork. Pick your state for a full-length practice exam and the steps to get your permit there.
¿Prefiere estudiar en español? Examen CDL de práctica en español
How the CDL permit test works
To get your commercial learner's permit (CLP), you take written knowledge tests at your state's licensing office. Everyone takes General Knowledge. Most drivers also take Air Brakes, and Class A drivers take Combination Vehicles. Endorsements like Hazmat, Tanker, Doubles/Triples, Passenger and School Bus each have their own test.
Most states require a score of 80% on each test. Start with General Knowledge, then work down the list. Pass a test here and it earns a check mark, so you can see what's left.
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