CDL Practice Test 2026
Prepare for your Commercial Driver License exam with our free practice tests. Covers general knowledge, air brakes, and state-specific requirements for all 50 states.
Choose a Practice Test
General Knowledge
30 questions covering HOS rules, cargo securement, pre-trip inspection, speed and distance, hazardous conditions, and accident procedures.
Select your state below to start the test with your state's passing requirements.
Air Brakes
15 questions on air brake components, inspection procedures, brake lag, spring brakes, dual air systems, and emergency procedures.
Select your state below to start the test with your state's passing requirements.
CDL Practice Test by State
Select your state to see local CDL requirements, fees, and take a practice test tailored to your state's passing score.
How the CDL Practice Test Works
Select Your State
Choose your state to see local CDL requirements, fees, and the passing score you will need.
Answer Questions
Work through practice questions one at a time. Each answer includes a detailed explanation.
Review Your Score
See your pass/fail result based on your state's requirements. Retake as many times as needed.
Frequently Asked Questions About CDL Practice Tests
How many questions are on the CDL general knowledge test?
Most states have 50 questions on the CDL general knowledge test, and you need to score at least 80% (40 out of 50) to pass. Our practice test covers 30 of the most commonly tested topics to help you prepare.
Is the CDL written test the same in every state?
The CDL knowledge test is based on the same federal FMCSA standards nationwide, but each state administers its own version. Question phrasing, the number of questions, fees, and passing scores can vary slightly. Our practice questions cover the core material tested in all 50 states.
Do I need to pass a separate air brakes test?
Yes. If you want to operate a vehicle equipped with air brakes, you must pass a separate air brakes knowledge test in addition to the general knowledge test. If you do not pass the air brakes test, your CDL will carry an 'L' restriction that limits you to vehicles without air brakes.
How should I study for the CDL permit test?
Start by reading your state's CDL manual thoroughly. Then take practice tests repeatedly until you consistently score above 80%. Focus on areas where you miss questions: Hours of Service, air brakes, cargo securement, and pre-trip inspection are the most commonly tested topics.
Can I retake the CDL knowledge test if I fail?
Yes. Every state allows retakes, but policies vary. Some states require a waiting period of 1-7 days between attempts, and some charge an additional fee for each retake. Check your state's specific requirements for retake policies.
Ready to Start Your Trucking Career?
Once you pass your CDL exam, browse thousands of trucking jobs across all 50 states.