Free CDL Practice Test (2026)
255 practice questions written from the official CDL manual — with a plain-English explanation for every answer. No sign-up, works on your phone, and honest about what it is: study practice, not the real exam.
Choose a practice test
- 60 questionsGeneral KnowledgeThe core test every CDL applicant takes — vehicle inspection, safe driving, and control.
- 40 questionsAir BrakesRequired to remove the L restriction and drive vehicles with air brakes.
- 30 questionsCombination VehiclesRequired for a Class A CDL — coupling, uncoupling, and driving tractor-trailers.
- 30 questionsHazardous Materials (H)Knowledge test for the hazmat endorsement (a TSA background check is also required).
- 25 questionsTank Vehicles (N)Knowledge test for the tanker endorsement — surge, load limits, and inspection.
- 25 questionsPassenger (P)Knowledge test for the passenger endorsement — buses and passenger safety.
- 25 questionsSchool Bus (S)Knowledge test for the school bus endorsement — loading, unloading, and student safety.
- 20 questionsDoubles/Triples (T)Knowledge test for the doubles/triples endorsement — coupling and handling multiple trailers.
How to use these practice tests
- Practice mode shows the correct answer and explanation after each question — best for learning.
- Timed practice mode is timed and shows results at the end — best for checking readiness.
- Missed questions come back with their explanations so you can focus your study.
- Answers and saved progress stay in your browser. See the privacy policy for analytics and storage controls.
Which tests do I need?
Every CDL applicant takes General Knowledge. Add Air Brakes to drive most large trucks, and Combinationfor a Class A. Then practice for any endorsement you want — see the endorsements guidefor what each one requires.
Practice test FAQ
Are these real CDL exam questions?
No. These are practice questions written from scratch based on the officially published CDL manual. Real exam questions are confidential. Practicing here is great preparation, but the state exam is the authority — and passing here doesn't guarantee passing your test.
Is the practice test really free?
Yes. No sign-up, no account, no payment, and we collect no personal information. Your progress stays in your browser.
Which practice test should I take first?
Start with General Knowledge — every CDL applicant takes that test. Add Air Brakes (needed to drive most large trucks) and Combination if you're going for a Class A. Then take the practice test for any endorsement you want, like hazmat or passenger.
How many questions do I need to get right?
Most states require about 80% to pass each knowledge test (often 40 of 50, or similar). Our timed practice mode shows your percentage so you can gauge readiness, but check your own state's passing score.