Free CDL Practice Tests
Instant feedback, an explanation for every answer, and no signup wall. Use these to find weak spots, then study those sections in your state's manual.
CDL General Knowledge Practice Test
Free CDL general knowledge practice test: 20 questions with instant feedback and plain-English explanations, based on the standard commercial driver manual topics.
Start the test → 12 questionsCDL Air Brakes Practice Test
Free CDL air brakes practice test: 12 questions with instant feedback covering pressures, warnings, spring brakes, and the leak test numbers people forget.
Start the test → 12 questionsCDL Combination Vehicles Practice Test
Free CDL combination vehicles practice test: 12 questions on coupling, air lines, the fifth wheel, off-tracking, and rollover risk for Class A applicants.
Start the test → 10 questionsCDL HazMat Practice Test
Free CDL HazMat endorsement practice test: 10 questions on placards, shipping papers, parking rules, fueling, and the TSA background check.
Start the test → 10 questionsCDL Tanker Practice Test
Free CDL tanker endorsement practice test: 10 questions on liquid surge, baffles, outage, high center of gravity, and safe tank vehicle driving.
Start the test → 10 questionsCDL Passenger Endorsement Practice Test
Free CDL passenger endorsement practice test: 10 questions on loading, standee lines, railroad crossings, fueling, and handling disruptive riders.
Start the test → 10 questionsCDL School Bus Practice Test
Free CDL school bus endorsement practice test: 10 questions on danger zones, loading and unloading, red lights and stop arm, mirrors, and evacuation.
Start the test → 10 questionsCDL Doubles and Triples Practice Test
Free CDL doubles/triples endorsement practice test: 10 questions on coupling order, the converter dolly, rollover risk, and handling multiple trailers.
Start the test →How to actually pass the real test
The real knowledge test is built from your state's commercial driver manual. Practice tests are for finding what you don't know yet, not for memorizing answers. Miss a question here, then go read that whole section of the manual. The pattern that fails people is grinding practice apps until the scores look good while never opening the manual.
Study only the tests your path requires. Everyone takes general knowledge. Air brakes matters unless you want an L restriction that blocks most trucking jobs. Combination vehicles applies to Class A. Endorsement tests (HazMat, tanker, passenger, school bus, doubles/triples) only make sense if the job you want needs them.
Official sources and verification links
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FMCSA Entry-Level Driver Training
The federal trucking agency (FMCSA) explains the required entry-level training (ELDT) and the federal list of approved schools.
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FMCSA Training Provider Registry
The official place to search approved training schools and file a complaint.
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FMCSA DOT medical exam and CMV certification
The federal agency explains the DOT physical, who can do it, and how long your medical card stays good.