Skip to main content
GetCDL.org
Free CDL Practice Test

Practice for your CDL written test

Free CDL practice questions straight from the official manual — three study modes, instant scoring, and unlimited retakes. No login, no paywall, ever.

Testing in a specific state? Ohio CDL practice test →

Choose a practice test

General Knowledge

148 questions

Required for every CDL — safe driving, inspections, speed and space management, and the rules of the road.

Choose a mode

Air Brakes

75 questions

Needed for any vehicle with air brakes. Pass it to clear the air-brake (L) restriction from your license.

Choose a mode

Combination Vehicles

60 questions

Required for Class A — coupling and uncoupling, trailers, and handling a tractor-trailer safely.

Choose a mode

Hazardous Materials

29 questions

Required for the H endorsement — recognizing, handling, and safely transporting placarded hazardous materials.

Choose a mode

Tanker

40 questions

Required for the N (tank vehicle) endorsement — liquids in bulk, surge, shifting cargo, and a high center of gravity.

Choose a mode

Doubles & Triples

44 questions

Required for the T endorsement — the extra knowledge and skill it takes to pull double or triple trailers safely.

Choose a mode
Study:
Untimed. Read each question and tap to reveal the answer and why.
Practice:
Answer and see right or wrong instantly, with the explanation.
Exam:
Timed, real-test conditions. You only see your results at the end.

Frequently asked questions

How many questions are on the real CDL tests?
It varies by state, but the General Knowledge test is typically around 50 questions, Air Brakes around 25, and Combination Vehicles around 20. Our Exam mode mirrors those lengths and times you accordingly.
Are these CDL practice tests really free?
Yes — completely free, with no login, no paywall, and unlimited retakes. We make money from optional school and carrier referrals, never from charging you to study.
What score do I need to pass?
Most states require 80% to pass each CDL knowledge test, so that's the pass line we use. Our Practice and Exam modes score you against it and show exactly which topics to review.
Where do the questions come from?
Every question comes from the official CDL manual, with the page cited — we show you the manual section and page behind each answer. Spot a mistake? Report it with the link in the footer and we'll fix it.
Which states do these cover?
The questions come from the AAMVA model CDL manual that most states use, so the General Knowledge material applies nationwide. For state-specific details, use your state's practice test — for example, the Ohio CDL practice test.

Written tests handled? The hands-on part comes next — our Ohio CDL skills test guide covers the vehicle inspection, the cone course, and the road test (the three-part structure is federal; the course diagrams are Ohio's).