Your readiness: complete any practice test above and this page will show your latest score per test against its pass mark. Scores are stored only in your browser — no account, nothing sent to us.
CDL Practice Tests
CDL Practice Tests
Commercial Driver's License practice for every state and endorsement.
529 original questions · 8 practice tests · 50 states and DC · every answer explained with its source citation
Source: FMCSA Commercial Driver's License Manual (public domain) plus state-specific supplements.Practice tests
50 questions per test
General Knowledge
Practice mode with explanations, or full mock exam — 50 questions, 80% to pass.
25 questions per testAir Brakes
Practice mode with explanations, or full mock exam — 25 questions, 80% to pass.
20 questions per testCombination Vehicles
Practice mode with explanations, or full mock exam — 20 questions, 80% to pass.
30 questions per testHazardous Materials
Practice mode with explanations, or full mock exam — 30 questions, 80% to pass.
20 questions per testTanker
Practice mode with explanations, or full mock exam — 20 questions, 80% to pass.
20 questions per testDoubles and Triples
Practice mode with explanations, or full mock exam — 20 questions, 80% to pass.
20 questions per testPassenger Transport
Practice mode with explanations, or full mock exam — 20 questions, 80% to pass.
20 questions per testSchool Bus
Practice mode with explanations, or full mock exam — 20 questions, 80% to pass.
Practice by state
Each state DMV uses slightly different rules and procedures. Practice with state-specific notes by selecting your state below.
Alabama
Alaska
Arizona
Arkansas
California
Colorado
Connecticut
Delaware
Florida
Georgia
Hawaii
Idaho
Illinois
Indiana
Iowa
Kansas
Kentucky
Louisiana
Maine
Maryland
Massachusetts
Michigan
Minnesota
Mississippi
Missouri
Montana
Nebraska
Nevada
New Hampshire
New Jersey
New Mexico
New York
North Carolina
North Dakota
Ohio
Oklahoma
Oregon
Pennsylvania
Rhode Island
South Carolina
South Dakota
Tennessee
Texas
Utah
Vermont
Virginia
Washington
West Virginia
Wisconsin
Wyoming
District of Columbia
Official CDL handbooks and licensing authorities by state
Direct links to each state's official handbook or licensing-authority page. Our questions are written from these sources and the real exam is set by them, so read the current edition for your state alongside the practice tests.
- Alabama — Alabama Law Enforcement Agency
- Alaska — Alaska Division of Motor Vehicles
- Arizona — Arizona Department of Transportation
- Arkansas — Arkansas Department of Finance and Administration
- California — California Department of Motor Vehicles
- Colorado — Colorado Division of Motor Vehicles
- Connecticut — Connecticut Department of Motor Vehicles
- Delaware — Delaware Division of Motor Vehicles
- Florida — Florida Department of Highway Safety and Motor Vehicles
- Georgia — Georgia Department of Driver Services
- Hawaii — Hawaii Department of Transportation
- Idaho — Idaho Transportation Department
- Illinois — Illinois Secretary of State
- Indiana — Indiana Bureau of Motor Vehicles
- Iowa — Iowa Department of Transportation
- Kansas — Kansas Division of Vehicles
- Kentucky — Kentucky Transportation Cabinet
- Louisiana — Louisiana Office of Motor Vehicles
- Maine — Maine Bureau of Motor Vehicles
- Maryland — Maryland Motor Vehicle Administration
- Massachusetts — Massachusetts Registry of Motor Vehicles
- Michigan — Michigan Secretary of State
- Minnesota — Minnesota Department of Public Safety
- Mississippi — Mississippi Department of Public Safety
- Missouri — Missouri Department of Revenue
- Montana — Montana Motor Vehicle Division
- Nebraska — Nebraska Department of Motor Vehicles
- Nevada — Nevada Department of Motor Vehicles
- New Hampshire — New Hampshire Division of Motor Vehicles
- New Jersey — New Jersey Motor Vehicle Commission
- New Mexico — New Mexico Motor Vehicle Division
- New York — New York Department of Motor Vehicles
- North Carolina — North Carolina Division of Motor Vehicles
- North Dakota — North Dakota Department of Transportation
- Ohio — Ohio Bureau of Motor Vehicles
- Oklahoma — Oklahoma Department of Public Safety
- Oregon — Oregon Driver and Motor Vehicle Services
- Pennsylvania — Pennsylvania Department of Transportation
- Rhode Island — Rhode Island Division of Motor Vehicles
- South Carolina — South Carolina Department of Motor Vehicles
- South Dakota — South Dakota Department of Public Safety
- Tennessee — Tennessee Department of Safety
- Texas — Texas Department of Public Safety
- Utah — Utah Driver License Division
- Vermont — Vermont Department of Motor Vehicles
- Virginia — Virginia Department of Motor Vehicles
- Washington — Washington Department of Licensing
- West Virginia — West Virginia Division of Motor Vehicles
- Wisconsin — Wisconsin Department of Transportation
- Wyoming — Wyoming Department of Transportation
- District of Columbia — District of Columbia DMV
About the CDL exam
Practice tests for the Commercial Driver's License written exam. Questions reflect the Federal Motor Carrier Safety Administration (FMCSA) Commercial Driver's License Manual that all states adopt as the basis for their CDL exams.
Teachers and trainers preparing students for CDL exams can find supporting lesson plans and teaching resources at LessonKind. For reference data on road weights, distances and measurements, 247Sizing is a handy companion.
Editorial Source
How we built these practice tests
Every question in our CDL bank was written by the 247SimpleTests Editorial Team using the current version of FMCSA Commercial Driver's License Manual (public domain) plus state-specific supplements.. We do not scrape questions from other test-prep sites; we write originals that test the same knowledge in different language. Each question lists the source section it was drawn from. Full methodology →
Recommended study materials
Study guide
CDL Study Guide (Trivium)
Complete prep for all CDL written tests: general knowledge, air brakes, combination vehicles, hazmat, and all endorsements. Includes full-length practice tests.
Check Price → Study guideCDL Practice Tests & Flashcards (Accepted Inc.)
600+ practice questions covering every FMCSA knowledge area, plus 400 flashcards for endorsement prep.
Check Price → Study guideMaster the CDL Truck Driver's License (Arco)
Arco's classic CDL prep with in-depth FMCSA manual coverage, endorsement chapters, and scored practice exams.
Check Price →As an Amazon Associate, CJ Affiliate, and AWIN publisher we earn from qualifying purchases. Links above are affiliate links. Full disclosure →
Practice test FAQs
Is the CDL practice test free?
Yes. All 529 practice questions across every CDL topic are free, with no sign-up, account, or payment required.
How many CDL practice questions are there in total?
This section has 529 original practice questions across 8 topic areas, each with a full explanation written by our editorial team.
Which CDL practice tests are included?
General Knowledge; Air Brakes; Combination Vehicles; Hazardous Materials; Tanker; Doubles and Triples; Passenger Transport; School Bus. Each is a separate practice test with its own question bank, pass mark and timed mock-exam mode, and each links to a topic-by-topic study page.
How long is the CDL mock exam?
Mock-exam mode is timed to match the pace of the real test: 20 questions in 20 minutes; 25 questions in 25 minutes; 30 questions in 30 minutes; 50 questions in 50 minutes. The timer starts when you open the mock, and the exam is scored automatically when it runs out or when you finish.
Does CDL practice cover my state?
Yes — select your state above for state-specific notes alongside the core practice questions, which are written from the applicable official handbook or manual.
Is there a study guide for the CDL exam?
Yes, see our CDL exam guide for the test format, scoring, what is covered, and study tips.
Do the CDL practice questions include answer explanations?
Yes. Every question includes a detailed explanation of the correct answer, so you learn the underlying material rather than memorizing answers.