General Knowledge
250 questions
Rules of the road, vehicle control, cargo and safe driving. Every CDL applicant takes this one.
Exam: 50 questions in 60 min80% to pass
Choose a section
Practice with instant answers and explanations, or run the timed exam simulator.
Air Brakes
100 questions
How air brake systems work, what to check, and how to stop safely with them.
Exam: 25 questions in 30 min80% to pass
Combination Vehicles
100 questions
Coupling and uncoupling, trailer handling and rollover control for tractor-trailers.
Exam: 25 questions in 30 min80% to pass
Pre-Trip Inspection
82 questions
What to inspect before you drive, what counts as a defect, and how to say it out loud.
Exam: 25 questions in 30 min80% to pass
How it works
- 1
Pick your state
Your question set is tuned to where you will take the exam.
- 2
Practice a section
Answer, see right or wrong instantly, and read why.
- 3
Run the simulator
Timed, no hints, 80% to pass — the same shape as the real test.
Free forever. Practice without signing up. Written from official US government CDL materials.
Practice tests are study aids — they are not the official state exam.