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CDL Practice Tests 2026

Practice tests that tell you exactly when you're ready to pass.

Practice with 2,000+ CDL questions covering General Knowledge, Air Brakes, HazMat, and all endorsements — built from official state CDL handbooks with detailed explanations for every answer. Free to start, no sign-up required.

All 50 statesIQ Readiness Score™Test-day simulations100% free to start

2,000+

CDL questions

50

states covered

7

endorsements

100%

with explanations

1

Practice with real questions

2,000+ questions from official CDL handbooks. Every answer includes a detailed explanation and handbook reference.

2

Focus on what you get wrong

Questions you miss come back automatically. The system tracks your weak spots across every endorsement and builds a personalized study plan.

3

Know when you're ready

Your IQ Readiness Score™ tracks 6 dimensions of readiness. When you hit 80%+, you're ready to book your test.

Learn more about the science behind DMV IQ →

~0%Sample Score

Know exactly when you're ready

The IQ Readiness Score™ measures six dimensions of CDL test readiness: memory stability, test performance, content coverage, recent accuracy, difficulty mastery, and reaction speed.

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Unlocked with Pro
6-dimension CDL analysisTracks your readiness across General Knowledge, Air Brakes, HazMat, and every CDL endorsement you're studying for.
Personalized CDL study pathAutomatically prioritizes your weakest CDL topics and endorsement areas to maximize study efficiency.
CDL pass probabilityReal-time estimate of your likelihood of passing based on your practice performance across all CDL sections.
Weak topic recoveryIdentifies and re-drills the specific CDL topics dragging your score down until they become strengths.

CDL Classes: A, B & C

CDL licenses are divided into three classes based on vehicle weight and type. Your class determines which vehicles you can operate and which endorsement tests you need to take.

A

Class A

Combination vehicles with a GCWR of 26,001+ lbs when the towed vehicle exceeds 10,000 lbs. Includes tractor-trailers, flatbeds, livestock carriers, and tankers.

Includes: Combination Vehicles, Doubles/Triples + all shared CDL topics
B

Class B

Heavy single vehicles with a GVWR of 26,001+ lbs, or towing a vehicle under 10,000 lbs. Includes straight trucks, large buses, dump trucks, and box trucks.

All shared CDL topics (no combination vehicles content)
C

Class C

Vehicles under 26,001 lbs designed to transport 16+ passengers or carrying hazardous materials requiring placards. Includes small passenger vans and HazMat delivery vehicles.

All shared CDL topics (no combination vehicles content)

CDL Endorsements

Most Popular

HazMat(H)

The HazMat endorsement (H) authorizes you to transport hazardous materials in commercial vehicles. This is one of the most sought-after CDL endorsements because it opens doors to higher-paying freight routes, including fuel tankers and chemical transports. Federal law requires a TSA background check in addition to the written knowledge test.

Practice NowRequired by Most

Air Brakes

The air brakes endorsement removes the air brake restriction from your CDL, allowing you to operate any commercial vehicle equipped with air brakes. Nearly all heavy trucks and buses use air brake systems, so passing this test is essential for most CDL holders. Without it, your CDL will carry a restriction limiting you to vehicles without air brakes.

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Tanker(N)

The Tanker endorsement (N) is required to drive a commercial vehicle designed to transport liquid or gaseous materials in a tank or tanks rated at 119 gallons or more. Liquid cargo behaves differently from solid freight -it surges and shifts, changing the vehicle's center of gravity. This endorsement ensures drivers understand these unique handling challenges.

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School Bus(S)

The School Bus endorsement (S) authorizes you to drive a school bus carrying students. This is one of the most regulated CDL endorsements due to the safety of child passengers. In addition to the knowledge test, most states require a thorough background check, and many require a separate skills test in a school bus. School bus drivers must also hold a Passenger (P) endorsement.

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Passenger(P)

The Passenger endorsement (P) authorizes you to drive a commercial vehicle designed to carry 16 or more passengers, including the driver. This endorsement is required for bus drivers, shuttle operators, and anyone operating large passenger vehicles. It covers the unique safety considerations of transporting people rather than cargo.

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Doubles/Triples(T)

The Doubles/Triples endorsement (T) authorizes you to pull double or triple trailers with a Class A CDL. This endorsement is common in long-haul freight operations where companies use multiple trailers for efficiency. Driving doubles and triples requires additional skill because the longer combination amplifies handling challenges like rearward amplification and off-tracking.

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Combination

Combination vehicles knowledge is tested as part of the Class A CDL general knowledge exam. It covers the operation of tractor-trailer rigs and other combination vehicles where a power unit pulls one or more trailers. Understanding coupling, uncoupling, jackknifing, and the unique handling characteristics of articulated vehicles is essential for any Class A CDL driver.

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CDL Practice by State

CDL knowledge tests are administered by your state’s DMV or licensing agency. While the CDL handbook is standardized nationally by the FMCSA, each state sets its own fees, procedures, and additional requirements. Select your state for practice questions tailored to your state’s CDL test.

AlabamaAlaskaArizonaArkansasCaliforniaColoradoConnecticutDistrict of ColumbiaDelawareFloridaGeorgiaHawaiiIdahoIllinoisIndianaIowaKansasKentuckyLouisianaMaineMarylandMassachusettsMichiganMinnesotaMississippiMissouriMontanaNebraskaNevadaNew HampshireNew JerseyNew MexicoNew YorkNorth CarolinaNorth DakotaOhioOklahomaOregonPennsylvaniaRhode IslandSouth CarolinaSouth DakotaTennesseeTexasUtahVermontVirginiaWashingtonWest VirginiaWisconsinWyoming

CDL Study Guides

CDL Practice Test: What to Expect and How to Prepare

CDL · 7 min read

CDL Practice Test: What to Expect and How to Prepare

The CDL knowledge test is longer and harder than the regular DMV test. Here's how to prepare efficiently.

Read more
CDL Endorsements Explained: H, N, P, S, T, X

CDL · 6 min read

CDL Endorsements Explained: H, N, P, S, T, X

Each endorsement opens different job opportunities. Learn what H, N, P, S, T, and X mean and which ones you need.

Read more

CDL Frequently Asked Questions

A Commercial Driver's License (CDL) is required to operate commercial motor vehicles (CMVs) over 26,001 pounds GVWR, vehicles designed to transport 16+ passengers, or any vehicle carrying hazardous materials requiring placards.
Class A covers combination vehicles with a GCWR of 26,001+ pounds when the towed vehicle is over 10,000 pounds. Class B covers single vehicles of 26,001+ pounds GVWR. Class C covers vehicles designed for 16+ passengers or HazMat vehicles.
Entry-Level Driver Training (ELDT) is a federal requirement effective since February 2022. You must complete ELDT through an FMCSA-registered training provider before taking the CDL skills test for a Class A or B CDL.
The CDL general knowledge test typically has 50 multiple-choice questions, and you need a score of 80% or higher to pass.
CDL costs vary significantly by state. The CDL application and testing fees typically range from $50 to $200. ELDT training costs $3,000 to $7,000 or more.
You can get a CDL at 18 in most states, but you will be restricted to intrastate (within your state) driving only. Federal law requires you to be at least 21 to drive across state lines.
CDL Practice Test 2026 - Free CDL Prep for All States | DMV IQ