CDL Practice Test 2026 — Free CDL Exam Prep Questions
The CDL General Knowledge Test is the written test every commercial driver must pass at a state licensing agency to get a commercial learner's permit for Class A, B or C. This practice set follows the federal required-knowledge areas and the AAMVA model CDL manual: vehicle inspection, basic control, seeing and space management, speed, hazards, emergencies, mountain and winter driving, and cargo securement.
Using a flashlight, you check the coupling and see space between the upper and lower fifth wheel. What does this most likely mean?
CDL format, scoring & key facts
Given by each state's driver licensing agency. Federal rules allow written, oral or automated tests, and a different version must be used on a retake.
| Who gives it | Each state's driver licensing agency, under federal rules in 49 CFR Part 383 |
|---|---|
| Study source | Your state's CDL manual, based on AAMVA's model manual (2005 CDL Test System) |
| Pass mark | 80% on each knowledge test |
| Test lengths (most states) | General Knowledge 50, Air Brakes 25, Combination Vehicles 20 |
| Question format | Multiple choice, one correct answer |
| Air brakes | Skipping or failing the Air Brakes test restricts you from driving CMVs with air brakes |
| Training | Entry-level driver training is required for first-time Class A/B since February 7, 2022 |
| Drug & alcohol | Since November 18, 2024, a "prohibited" Clearinghouse status blocks issuing a CLP or CDL |
Facts last verified Oct 17, 2026. Source: www.law.cornell.edu/cfr/text/49/383.111. Always confirm details with FMCSA before your exam.
When can you take the CDL?
Knowledge tests are taken at state licensing offices; appointment rules vary by state.
Plan backwards from your exam date
What the CDL covers
Every PrepBanq CDL test covers the official content areas; the test owner does not publish weights.
| Content domain | Our practice questions |
|---|---|
Section 1: IntroductionGeneral Knowledge test: CDL tests and CLP, medical certification, disqualifications and other federal CDL rules. | 6 questions → |
Section 2: Driving SafelyGeneral Knowledge test: inspection, basic control, shifting, seeing, communicating, speed and space management, hazards, night, winter and mountain driving, emergencies, ABS, skids, accidents, fires, alcohol and hazmat basics. | 63 questions → |
Section 3: Transporting Cargo SafelyGeneral Knowledge test: inspecting cargo, weight and balance, securing cargo and special loads. | 10 questions → |
Section 5: Air BrakesAir Brakes test: system parts, dual systems, inspecting air brakes and using them safely. | 39 questions → |
Section 6: Combination VehiclesCombination Vehicles test (Class A): driving combinations, combination air brakes, trailer ABS, coupling and uncoupling, and inspection. | 32 questions → |
How to register for the CDL
Eligibility
Pass the General Knowledge test (and any required endorsement tests) to get a commercial learner's permit (CLP). Hold the CLP for at least 14 days before the skills test. Since February 7, 2022, first-time Class A or B applicants also need entry-level driver training from a provider on FMCSA's Training Provider Registry.
Retake policy
Retake rules and waiting periods are set by each state; a retake must use a different version of the test.
Credential renewal
A CLP is valid for no more than one year without retaking the knowledge tests.
Your path to passing the CDL
Diagnostic
Free test across every content areaTargeted practice
Drill your weakest areas firstReview
Every option explainedFull simulation
Real format and timingReady
Book your exam with confidenceCDL practice tests
All CDL tests →The full CDL question bank is on its way
All CDL practice tests here are free right now. Leave your email and we'll tell you when the complete question bank, full-length simulations and readiness tracking launch.
CDL FAQ
How many questions are on the CDL?
The CDL has 50 questions. Question types: Multiple choice, one correct answer, drawn from the FMCSA-approved question pool based on the AAMVA model CDL manual. Separate knowledge tests: General Knowledge (all applicants), Air Brakes (vehicles with air brakes) and Combination Vehicles (Class A), plus endorsement tests. In most states General Knowledge has 50 questions, Air Brakes 25 and Combination 20..
What is the passing score for the CDL?
CDL passing standard: At least 80% correct on each knowledge test (e.g. 40 of 50 on General Knowledge).
How much does the CDL cost?
The CDL registration fee is Set by each state. Check the official site for current fees before you register.
What is on the CDL?
The CDL covers Section 1: Introduction, Section 2: Driving Safely, Section 3: Transporting Cargo Safely, Section 5: Air Brakes, Section 6: Combination Vehicles.
Who administers the CDL?
The Commercial Driver's License (CDL) General Knowledge Test is administered by FMCSA. Delivery: Given by each state's driver licensing agency. Federal rules allow written, oral or automated tests, and a different version must be used on a retake.
Can you retake the CDL?
Retake rules and waiting periods are set by each state; a retake must use a different version of the test.
Is there a free CDL practice test?
Yes. PrepBanq has 15 free CDL practice tests with 150 exam-style questions in the real CDL formats, and every answer is explained. No credit card is needed.
CDL practice test reviews
No reviews yet. Took a free CDL practice test? Tell other test-takers how it went.
Related career & vocational exams
Your CDL prep starts with one free test.
Instant score report · no credit card.