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Comprehensive CDL practice tests covering General Knowledge, Air Brakes, Combination Vehicles, Hazmat, Tanker, and every endorsement. Master the real exam format and join thousands of newly licensed commercial drivers.

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Question 12 of 50

42:18

During a pre-trip inspection, you find the brake chambers have excessive pushrod travel. What should you do?

A. Note it in your logbook and continue driving

B. Adjust the brakes or have them adjusted before driving

C. Drive slower and check again after 50 miles

D. Report it at the next required inspection

85% Pass Rate

First attempt success

Practice Questions

Practice Tests

Pass Rate

Endorsements Covered

Find Your State CDL Practice Test

Select your state to access CDL practice tests tailored to your state’s requirements, fees, and test centers.

Browse CDL Practice Tests by State

Northeast

Connecticut, Maine, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont

Southeast

Alabama, Arkansas, Florida, Georgia, Kentucky, Louisiana, Mississippi, North Carolina, South Carolina, Tennessee, Virginia, West Virginia

Midwest

Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Nebraska, North Dakota, Ohio, South Dakota, Wisconsin

Southwest

Arizona, New Mexico, Oklahoma, Texas

West

Alaska, California, Colorado, Hawaii, Idaho, Montana, Nevada, Oregon, Utah, Washington, Wyoming

Common Challenges

Struggling to Pass Your CDL?

Most CDL applicants run into the same roadblocks that turn a one-time test into a multi-attempt ordeal.

State manuals are long and the real exam tests different details

Air brakes and pre-trip inspection feel overwhelming without hands-on practice

Endorsement exams (Hazmat, Tanker, Passenger) each need separate prep

No clear sense of which topics to prioritize and which to skim

Why Choose Us

Everything You Need to Pass

Our platform gives you the tools and resources you need to ace your CDL knowledge test, skills test, and every endorsement exam.

Realistic CDL Exams

Practice with questions that mirror the actual CDL knowledge test format, difficulty, and coverage of the FMCSA model test.

Performance Analytics

Track progress with detailed analytics showing strengths, weaknesses, and a predicted CDL exam score before test day.

Comprehensive Study Guides

Access expertly written study materials covering every CDL topic — General Knowledge, Air Brakes, Combination Vehicles, and all 7 endorsements.

Veteran Instructor Support

Get help from experienced CDL holders and trucking school instructors whenever you have questions about a tricky scenario.

Mobile Friendly

Study anywhere — at the yard, between loads, or on a break — with a fully responsive platform that works on every device.

Always Updated

Our question bank is continuously updated to reflect the latest FMCSA regulations, state-specific CDL rules, and endorsement requirements.

Simple Process

Start Your Journey Today

Three simple steps to transform your CDL exam prep and walk into the DMV with confidence.

Choose Your Test

Pick a category — General Knowledge, Air Brakes, Combination, or any endorsement — and start with a free diagnostic test.

Practice and Learn

Take unlimited practice tests, read detailed explanations for every answer, and watch your weak areas turn into strengths.

Pass With Confidence

50 Questions Pass: 40/50 Max 10 wrong

4.7/5 (1,298 attempts)

Completion Rate 38%

Updated: June 2026

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MOST POPULAR

Intermediate

CDL Air Brakes Practice Test

Complete air brake system components, operation, inspection, and testing procedures.

100 Questions Pass: 80/100 Max 20 wrong

4.8/5 (4,217 attempts)

Completion Rate 72%

Updated: August 2026

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Intermediate

CDL Air Brakes Part 2

Brake system components and operation in depth — compressors, reservoirs, valves.

100 Questions Pass: 80/100 Max 20 wrong

4.6/5 (2,876 attempts)

Completion Rate 58%

Updated: July 2026

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Advanced

CDL Air Brakes Part 3

Brake inspection, testing, and ABS systems for Class A and B vehicles.

50 Questions Pass: 40/50 Max 10 wrong

4.7/5 (1,987 attempts)

Completion Rate 44%

Updated: July 2026

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MOST POPULAR

Intermediate

CDL Vehicle Inspection Practice Test

Complete guide for CDL skills test — pre-trip, en-route, and post-trip inspections.

50 Questions Pass: 40/50 Max 10 wrong

4.8/5 (3,476 attempts)

Completion Rate 69%

Updated: August 2026

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Intermediate

CDL Vehicle Inspection Part 2

Engine compartment and cab inspection procedures for the CDL skills test.

50 Questions Pass: 40/50 Max 10 wrong

4.6/5 (2,145 attempts)

Completion Rate 56%

Updated: July 2026

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Intermediate

CDL Vehicle Inspection Part 3

Coupling system and trailer inspection procedures for combination vehicles.

50 Questions Pass: 40/50 Max 10 wrong

4.5/5 (1,786 attempts)

Completion Rate 48%

Updated: July 2026

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Beginner

CDL Vehicle Inspection Part 4

En-route and post-trip inspection requirements every CDL driver must know.

50 Questions Pass: 40/50 Max 10 wrong

4.6/5 (1,543 attempts)

Completion Rate 41%

Updated: June 2026

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Intermediate

CDL Basic Vehicle Control Practice Test

Complete skills test guide — backing maneuvers, parking, and turning technique.

50 Questions Pass: 40/50 Max 10 wrong

4.7/5 (2,891 attempts)

Completion Rate 64%

Updated: August 2026

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Intermediate

CDL Basic Vehicle Control Part 2

Straight line backing and alley docking maneuvers for the skills test.

50 Questions Pass: 40/50 Max 10 wrong

4.5/5 (1,876 attempts)

Completion Rate 52%

Updated: July 2026

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Intermediate

CDL Basic Vehicle Control Part 3

Parallel parking and offset backing — the maneuvers that fail most CDL testers.

50 Questions Pass: 40/50 Max 10 wrong

4.6/5 (1,654 attempts)

Completion Rate 47%

Updated: July 2026

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Beginner

CDL Basic Vehicle Control Part 4

Advanced backing maneuvers and skills test tips from veteran CDL instructors.

10 Questions Pass: 8/10 Max 2 wrong

4.4/5 (987 attempts)

Completion Rate 36%

Updated: June 2026

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MOST POPULAR

Advanced

CDL Combination Vehicles Practice Test

Master your Class A test — coupling, uncoupling, inspection, and driving technique.

100 Questions Pass: 80/100 Max 20 wrong

4.8/5 (3,287 attempts)

Completion Rate 67%

Updated: August 2026

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Advanced

CDL Combination Vehicles Part 2

Backing combination vehicles and special situations every Class A driver must master.

80 Questions Pass: 64/80 Max 16 wrong

4.6/5 (1,986 attempts)

Completion Rate 51%

Updated: July 2026

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MOST POPULAR

Intermediate

CDL Cargo Management Practice Test

Cargo securement, weight distribution, and hazardous materials handling fundamentals.

50 Questions Pass: 40/50 Max 10 wrong

4.6/5 (2,143 attempts)

Completion Rate 58%

Updated: August 2026

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Intermediate

CDL Cargo Management Part 2

Weight distribution and hazardous cargo handling for safe and legal transport.

30 Questions Pass: 24/30 Max 6 wrong

4.5/5 (1,543 attempts)

Completion Rate 44%

Updated: July 2026

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MOST POPULAR

Intermediate

CDL Federal Regulations Practice Test

Hours of service, ELDs, drug & alcohol testing, and disqualification rules.

50 Questions Pass: 40/50 Max 10 wrong

4.6/5 (2,398 attempts)

Completion Rate 60%

Updated: August 2026

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Intermediate

CDL Federal Regulations Part 2

Hours of service and electronic logging devices in greater detail.

30 Questions Pass: 24/30 Max 6 wrong

4.4/5 (1,432 attempts)

Completion Rate 42%

Updated: July 2026

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MOST POPULAR

Advanced

CDL Hazmat Practice Test

Hazmat endorsement — placarding, shipping papers, and emergency response.

50 Questions Pass: 40/50 Max 10 wrong

4.8/5 (3,654 attempts)

Completion Rate 63%

Updated: August 2026

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Advanced

CDL Hazmat Part 2

Placarding and shipping papers — the paperwork every H endorsement holder needs.

50 Questions Pass: 40/50 Max 10 wrong

4.6/5 (2,187 attempts)

Completion Rate 49%

Updated: July 2026

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Advanced

CDL Hazmat Part 3

Emergency response and hazmat driving procedures for safe transport.

50 Questions Pass: 40/50 Max 10 wrong

4.7/5 (1,876 attempts)

Completion Rate 41%

Updated: July 2026

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MOST POPULAR

Intermediate

CDL Tanker Practice Test

Pass your N Endorsement — liquid surge, bulkheads, outage, and safe driving.

50 Questions Pass: 40/50 Max 10 wrong

4.7/5 (2,786 attempts)

Completion Rate 59%

Updated: August 2026

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Intermediate

CDL Tanker Part 2

Tanker stability and surge management — the physics that catches new drivers off guard.

50 Questions Pass: 40/50 Max 10 wrong

4.5/5 (1,654 attempts)

Completion Rate 44%

Updated: July 2026

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MOST POPULAR

Intermediate

CDL Passenger Transport Practice Test

Pass your P Endorsement — passenger safety, loading, and emergency procedures.

50 Questions Pass: 40/50 Max 10 wrong

4.7/5 (2,543 attempts)

Completion Rate 57%

Updated: August 2026

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Intermediate

CDL Passenger Transport Part 2

Passenger safety and emergency procedures for buses and passenger vehicles.

50 Questions Pass: 40/50 Max 10 wrong

4.5/5 (1,543 attempts)

Completion Rate 43%

Updated: July 2026

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MOST POPULAR

Advanced

Comprehensive CDL general knowledge — the ultimate test for serious drivers.

50 Questions Pass: 40/50 Max 10 wrong

4.9/5 (5,287 attempts)

Completion Rate 82%

Updated: August 2026

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Comprehensive

CDL Full Practice Test Part 2

Comprehensive CDL general knowledge continued — another 50 real-style questions.

50 Questions Pass: 40/50 Max 10 wrong

4.8/5 (4,876 attempts)

Completion Rate 79%

Updated: August 2026

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Comprehensive

CDL Full Practice Test Part 3

Comprehensive CDL general knowledge continued — another 50 real-style questions.

50 Questions Pass: 40/50 Max 10 wrong

4.8/5 (4,543 attempts)

Completion Rate 76%

Updated: August 2026

Start Test

Comprehensive

CDL Full Practice Test Part 4

Comprehensive CDL general knowledge continued — another 50 real-style questions.

50 Questions Pass: 40/50 Max 10 wrong

4.7/5 (4,198 attempts)

Completion Rate 73%

Updated: August 2026

Start Test

Comprehensive

CDL Full Practice Test Part 5

Comprehensive CDL general knowledge continued — another 50 real-style questions.

50 Questions Pass: 40/50 Max 10 wrong

4.8/5 (3,876 attempts)

Completion Rate 70%

Updated: August 2026

Start Test

Comprehensive

CDL Full Practice Test Part 6

Comprehensive CDL general knowledge continued — another 50 real-style questions.

50 Questions Pass: 40/50 Max 10 wrong

4.7/5 (3,654 attempts)

Completion Rate 68%

Updated: August 2026

Start Test

Comprehensive

CDL Full Practice Test Part 7

Comprehensive CDL general knowledge continued — another 50 real-style questions.

50 Questions Pass: 40/50 Max 10 wrong

4.7/5 (3,432 attempts)

Completion Rate 65%

Updated: August 2026

Start Test

Comprehensive

CDL Full Practice Test Part 8

Comprehensive CDL general knowledge continued — another 50 real-style questions.

50 Questions Pass: 40/50 Max 10 wrong

4.6/5 (3,198 attempts)

Completion Rate 63%

Updated: August 2026

Start Test

Comprehensive

CDL Full Practice Test Part 9

Comprehensive CDL general knowledge continued — another 50 real-style questions.

50 Questions Pass: 40/50 Max 10 wrong

4.7/5 (2,987 attempts)

Completion Rate 61%

Updated: August 2026

Start Test

Comprehensive

CDL Full Practice Test Part 10

Comprehensive CDL general knowledge continued — another 50 real-style questions.

50 Questions Pass: 40/50 Max 10 wrong

4.6/5 (2,843 attempts)

Completion Rate 59%

Updated: August 2026

Start Test

Comprehensive

CDL Full Practice Test Part 11

Comprehensive CDL general knowledge continued — another 50 real-style questions.

50 Questions Pass: 40/50 Max 10 wrong

4.6/5 (2,654 attempts)

Completion Rate 57%

Updated: July 2026

Start Test

Comprehensive

CDL Full Practice Test Part 12

Comprehensive CDL general knowledge continued — another 50 real-style questions.

50 Questions Pass: 40/50 Max 10 wrong

4.7/5 (2,543 attempts)

Completion Rate 55%

Updated: July 2026

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Comprehensive

CDL Full Practice Test Part 13

Comprehensive CDL general knowledge continued — another 50 real-style questions.

50 Questions Pass: 40/50 Max 10 wrong

4.6/5 (2,398 attempts)

Completion Rate 53%

Updated: July 2026

Start Test

Comprehensive

CDL Full Practice Test Part 14

Comprehensive CDL general knowledge continued — another 50 real-style questions.

50 Questions Pass: 40/50 Max 10 wrong

4.5/5 (2,187 attempts)

Completion Rate 51%

Updated: July 2026

Start Test

Comprehensive

CDL Full Practice Test Part 15

Comprehensive CDL general knowledge continued — another 50 real-style questions.

50 Questions Pass: 40/50 Max 10 wrong

4.6/5 (1,987 attempts)

Completion Rate 49%

Updated: July 2026

Start Test

Comprehensive

CDL Full Practice Test Part 16

Comprehensive CDL general knowledge continued — another 50 real-style questions.

50 Questions Pass: 40/50 Max 10 wrong

4.5/5 (1,876 attempts)

Completion Rate 47%

Updated: July 2026

Start Test

Comprehensive

CDL Full Practice Test Part 17

Comprehensive CDL general knowledge continued — another 50 real-style questions.

50 Questions Pass: 40/50 Max 10 wrong

4.6/5 (1,765 attempts)

Completion Rate 45%

Updated: July 2026

Start Test

Comprehensive

CDL Full Practice Test Part 18

Comprehensive CDL general knowledge continued — another 50 real-style questions.

50 Questions Pass: 40/50 Max 10 wrong

4.5/5 (1,654 attempts)

Completion Rate 43%

Updated: July 2026

Start Test

Comprehensive

CDL Full Practice Test Part 19

Comprehensive CDL general knowledge continued — another 50 real-style questions.

50 Questions Pass: 40/50 Max 10 wrong

4.5/5 (1,543 attempts)

Completion Rate 41%

Updated: July 2026

Start Test

Comprehensive

CDL Full Practice Test Part 20

Comprehensive CDL general knowledge continued — another 50 real-style questions.

50 Questions Pass: 40/50 Max 10 wrong

4.6/5 (1,487 attempts)

Completion Rate 39%

Updated: July 2026

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Success Stories

What Our Drivers Say

Join thousands of newly licensed CDL drivers who trusted PrepMaster for their exam preparation.

“I failed my CDL General Knowledge test twice before finding PrepMaster. The practice questions were almost identical to the real DMV exam, and the Air Brakes section finally clicked for me. Passed on my third try with confidence.”

Jake Martinez

Class A CDL, Austin TX

“The detailed explanations after each question helped me understand not just the right answer, but WHY it was right. The Hazmat and Tanker endorsement tests were especially useful. Worth every penny for anyone serious about passing.”

Sarah Chen

Class A + H, N Endorsements, Phoenix AZ

“After 12 years out of the industry, I needed to recertify. PrepMaster gave me the refresher I needed on the new hours-of-service rules and ELD requirements. The progress tracking showed me exactly where to focus my studying.”

Mike Rodriguez

Class A CDL, Los Angeles CA

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Join over 50,000 future commercial drivers who have used PrepMaster to pass their CDL knowledge test, skills test, and endorsement exams. Start your free practice test today.

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