Practice Tests
CDL Practice Tests
— Pass First Try
Realistic CDL knowledge test practice covering General Knowledge, Air Brakes, and Combination Vehicles. Aligned with FMCSA regulations for Class A and Class B licenses.
Practice exams coming soon — explore our free guide below
4M+
CDL holders in the US
80%
Passing score per section
3+
Knowledge test sections
$70K+
Average trucker salary
CDL Knowledge Test Sections
All CDL applicants must pass the General Knowledge test. Additional sections depend on the license class and endorsements you are seeking.
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General Knowledge
Required for all CDL
50 questions
Pass: 40 correct (80%)
Vehicle inspection, basic vehicle control, shifting, backing, coupling/uncoupling, pre-trip inspection, cargo, hazardous materials basics, accident procedures
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Air Brakes
Required for Class A & B
25 questions
Pass: 20 correct (80%)
Air brake system components, dual air brakes, inspection procedures, using air brakes, stopping distances, brake failure procedures
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Combination Vehicles
Required for Class A
20 questions
Pass: 16 correct (80%)
Coupling and uncoupling procedures, inspecting combination vehicles, driving combination vehicles, combination vehicle air brakes
📋Each section graded independently — 80% required per section
🏛️Tests administered at your state DMV or approved testing center
🔄You can retake failed sections after a waiting period
🚛Also need skills test (pre-trip, basic controls, road test)
Career & Salary Outcomes
A CDL opens access to one of the largest and most in-demand job markets in the US.
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Long-Haul Truck Driver
$65,000–$90,000/yr
OTR (over-the-road) drivers are in massive demand. Top earners at large carriers can exceed $100K with bonuses.
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Commercial Bus Driver
$45,000–$70,000/yr
CDL Class B drivers operate city buses, school buses, and charter coaches. Stable government and union positions available.
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Specialized Transport
$70,000–$110,000/yr
Hazmat, tanker, and oversized load drivers earn premium pay. Additional endorsements required and well worth pursuing.
Why practice with FullPracticeTests
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State-Accurate Questions
Questions aligned with FMCSA regulations and the CDL manual used by all 50 states.
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Section-by-Section Practice
Practice General Knowledge, Air Brakes, and Combination Vehicles separately or together.
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Weak Area Identification
Know exactly which CDL topic areas to review before your DMV appointment.
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Exam Simulation
Practice with the same question count and format as your actual DMV knowledge test.
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Unlimited Retakes
Practice as many times as needed until you can consistently score 90%+ before test day.
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Study on Your Schedule
Mobile-friendly practice between training sessions, on the road, or wherever you have time.