Pass Your CDL Exam With Confidence
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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During a pre-trip inspection, you find the brake chambers have excessive pushrod travel. What should you do?
85% Pass Rate
First attempt success
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Endorsements Covered
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
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.
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
Walk into the DMV or your trucking school fully prepared and join thousands of newly licensed commercial drivers nationwide.
CDL Practice Tests
Target your studying with practice tests organized by CDL category. 2,900+ questions across 53 practice tests and 7 endorsement exams.
CDL General Knowledge Practice Test
Master essential CDL fundamentals: vehicle control, speed management, safe driving principles.
Updated: August 2026
Start TestCDL General Knowledge Part 2
Vehicle control, speed management, and safe driving principles in greater depth.
Updated: August 2026
Start TestCDL General Knowledge Part 3
Night driving, railroad crossings, and emergency situations for Class A and B drivers.
Updated: July 2026
Start TestCDL General Knowledge Part 4
Alcohol/drug awareness, disqualification, medical requirements for CDL holders.
Updated: July 2026
Start TestCDL General Knowledge Part 5
Hazard perception, accident reporting, and fire safety procedures.
Updated: June 2026
Start TestCDL General Knowledge Part 6
Distracted driving, fatigue management, and a final review of all CDL fundamentals.
Updated: June 2026
Start TestCDL Air Brakes Practice Test
Complete air brake system components, operation, inspection, and testing procedures.
Updated: August 2026
Start TestCDL Air Brakes Part 2
Brake system components and operation in depth — compressors, reservoirs, valves.
Updated: July 2026
Start TestCDL Air Brakes Part 3
Brake inspection, testing, and ABS systems for Class A and B vehicles.
Updated: July 2026
Start TestCDL Vehicle Inspection Practice Test
Complete guide for CDL skills test — pre-trip, en-route, and post-trip inspections.
Updated: August 2026
Start TestCDL Vehicle Inspection Part 2
Engine compartment and cab inspection procedures for the CDL skills test.
Updated: July 2026
Start TestCDL Vehicle Inspection Part 3
Coupling system and trailer inspection procedures for combination vehicles.
Updated: July 2026
Start TestCDL Vehicle Inspection Part 4
En-route and post-trip inspection requirements every CDL driver must know.
Updated: June 2026
Start TestCDL Basic Vehicle Control Practice Test
Complete skills test guide — backing maneuvers, parking, and turning technique.
Updated: August 2026
Start TestCDL Basic Vehicle Control Part 2
Straight line backing and alley docking maneuvers for the skills test.
Updated: July 2026
Start TestCDL Basic Vehicle Control Part 3
Parallel parking and offset backing — the maneuvers that fail most CDL testers.
Updated: July 2026
Start TestCDL Basic Vehicle Control Part 4
Advanced backing maneuvers and skills test tips from veteran CDL instructors.
Updated: June 2026
Start TestCDL Combination Vehicles Practice Test
Master your Class A test — coupling, uncoupling, inspection, and driving technique.
Updated: August 2026
Start TestCDL Combination Vehicles Part 2
Backing combination vehicles and special situations every Class A driver must master.
Updated: July 2026
Start TestCDL Cargo Management Practice Test
Cargo securement, weight distribution, and hazardous materials handling fundamentals.
Updated: August 2026
Start TestCDL Cargo Management Part 2
Weight distribution and hazardous cargo handling for safe and legal transport.
Updated: July 2026
Start TestCDL Federal Regulations Practice Test
Hours of service, ELDs, drug & alcohol testing, and disqualification rules.
Updated: August 2026
Start TestCDL Federal Regulations Part 2
Hours of service and electronic logging devices in greater detail.
Updated: July 2026
Start TestCDL Hazmat Practice Test
Hazmat endorsement — placarding, shipping papers, and emergency response.
Updated: August 2026
Start TestCDL Hazmat Part 2
Placarding and shipping papers — the paperwork every H endorsement holder needs.
Updated: July 2026
Start TestCDL Hazmat Part 3
Emergency response and hazmat driving procedures for safe transport.
Updated: July 2026
Start TestCDL Tanker Practice Test
Pass your N Endorsement — liquid surge, bulkheads, outage, and safe driving.
Updated: August 2026
Start TestCDL Tanker Part 2
Tanker stability and surge management — the physics that catches new drivers off guard.
Updated: July 2026
Start TestCDL Passenger Transport Practice Test
Pass your P Endorsement — passenger safety, loading, and emergency procedures.
Updated: August 2026
Start TestCDL Passenger Transport Part 2
Passenger safety and emergency procedures for buses and passenger vehicles.
Updated: July 2026
Start TestCDL Doubles & Triples Practice Test
Pass your T Endorsement — coupling, uncoupling, and inspecting multiple trailers.
Updated: August 2026
Start TestCDL Doubles & Triples Part 2
Doubles/triples coupling and uncoupling procedures in greater depth.
Updated: July 2026
Start TestCDL School Bus Part 2
School bus specific safety and loading procedures for the S Endorsement.
Updated: August 2026
Start TestCDL Practice Test: Complete Study Guide
Comprehensive CDL general knowledge — the ultimate test for serious drivers.
Updated: August 2026
Start TestCDL Full Practice Test Part 2
Comprehensive CDL general knowledge continued — another 50 real-style questions.
Updated: August 2026
Start TestCDL Full Practice Test Part 3
Comprehensive CDL general knowledge continued — another 50 real-style questions.
Updated: August 2026
Start TestCDL Full Practice Test Part 4
Comprehensive CDL general knowledge continued — another 50 real-style questions.
Updated: August 2026
Start TestCDL Full Practice Test Part 5
Comprehensive CDL general knowledge continued — another 50 real-style questions.
Updated: August 2026
Start TestCDL Full Practice Test Part 6
Comprehensive CDL general knowledge continued — another 50 real-style questions.
Updated: August 2026
Start TestCDL Full Practice Test Part 7
Comprehensive CDL general knowledge continued — another 50 real-style questions.
Updated: August 2026
Start TestCDL Full Practice Test Part 8
Comprehensive CDL general knowledge continued — another 50 real-style questions.
Updated: August 2026
Start TestCDL Full Practice Test Part 9
Comprehensive CDL general knowledge continued — another 50 real-style questions.
Updated: August 2026
Start TestCDL Full Practice Test Part 10
Comprehensive CDL general knowledge continued — another 50 real-style questions.
Updated: August 2026
Start TestCDL Full Practice Test Part 11
Comprehensive CDL general knowledge continued — another 50 real-style questions.
Updated: July 2026
Start TestCDL Full Practice Test Part 12
Comprehensive CDL general knowledge continued — another 50 real-style questions.
Updated: July 2026
Start TestCDL Full Practice Test Part 13
Comprehensive CDL general knowledge continued — another 50 real-style questions.
Updated: July 2026
Start TestCDL Full Practice Test Part 14
Comprehensive CDL general knowledge continued — another 50 real-style questions.
Updated: July 2026
Start TestCDL Full Practice Test Part 15
Comprehensive CDL general knowledge continued — another 50 real-style questions.
Updated: July 2026
Start TestCDL Full Practice Test Part 16
Comprehensive CDL general knowledge continued — another 50 real-style questions.
Updated: July 2026
Start TestCDL Full Practice Test Part 17
Comprehensive CDL general knowledge continued — another 50 real-style questions.
Updated: July 2026
Start TestCDL Full Practice Test Part 18
Comprehensive CDL general knowledge continued — another 50 real-style questions.
Updated: July 2026
Start TestCDL Full Practice Test Part 19
Comprehensive CDL general knowledge continued — another 50 real-style questions.
Updated: July 2026
Start TestCDL Full Practice Test Part 20
Comprehensive CDL general knowledge continued — another 50 real-style questions.
Updated: July 2026
Start TestWhat 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
Ready to Ace Your CDL Exam?
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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