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Free Ohio CDL Practice Test

Ohio CDL practice test

Free practice questions drawn from the Ohio CDL Manual (BMV form HSY 7605) — study, practice, and timed exam modes with instant scoring. No login, no paywall, ever.

← All CDL practice tests

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General Knowledge

148 questions

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

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Air Brakes

75 questions

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

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Combination Vehicles

60 questions

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

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Hazardous Materials

29 questions

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

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Tanker

40 questions

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

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Doubles & Triples

44 questions

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

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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

Is this the official Ohio CDL test?
No. This is free practice only. The official knowledge test is administered by the Ohio BMV at a driver exam station. Our questions are built from the same source — the Ohio CDL Manual (HSY 7605) — to get you ready for it.
What's the passing score on the Ohio CDL knowledge test?
You need 80% to pass each Ohio CDL knowledge test, which is the pass line our Practice and Exam modes use.
Where do the Ohio questions come from?
Every Ohio question comes from the Ohio CDL Manual (BMV form HSY 7605), with the page cited — we show the manual section and page behind each answer. Spot a mistake? Report it with the link in the footer and we'll fix it.
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.

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).