Ohio General Knowledge Practice Test
The foundation test every CDL applicant takes, regardless of class or endorsement. It covers safe driving basics at commercial scale: speed and space management, stopping distance, night and winter driving, cargo securement fundamentals, emergency handling, and the rules that apply specifically to large vehicles. Nothing on it is exotic — but everything on it assumes you understand how differently an 80,000-pound vehicle behaves from the car you learned in. Most states draw their questions straight from the state CDL manual's general knowledge chapters.
Who needs it: Every CDL applicant, Class A or B, no exceptions — this is the first knowledge test at the counter.
Sample practice questions
When should you turn the retarder off?
Answer: When the road is wet, icy, or snowy — On slippery roads the retarder can spin the drive wheels and cause a skid.
The combined strength of cargo tie-downs must be at least:
Answer: Half the cargo weight — Tie-downs must total at least 50% of the cargo's weight.
You take your skills test in a vehicle without air brakes. What happens?
Answer: You get an "L" restriction barring you from air-brake vehicles — Testing without air brakes (or failing the air-brake knowledge part) gives an "L" restriction.
Common mistakes on the General Knowledge test
- Studying answer letters instead of the rule — the state shuffles wording, so memorized letters collapse on test day
- Underestimating stopping-distance math: perception + reaction + braking distance questions are near-guaranteed
- Skipping the cargo chapters because "that's a flatbed thing" — securement basics are on the general test
- Confusing the 4-second following-distance rule of thumb with the 1-second-per-10-feet rule the manual actually teaches
- Cramming the night before instead of spacing practice — retention under exam pressure comes from repetition
Studying with the full Truckcess course does double duty: the theory counts toward the federal ELDT requirement (Truckcess is listed on the FMCSA Training Provider Registry).
Official source: Ohio Bureau of Motor Vehicles
CDL licensing in Ohio is administered by the Ohio Bureau of Motor Vehicles. Fees, scheduling, forms, and the official Ohio CDL manual live on the official site: Ohio BMV — official CDL page (verified 2026-08-09).
Truckcess is not affiliated with or endorsed by the Ohio Bureau of Motor Vehicles. Our practice tests cover the federal CDL knowledge standards (49 CFR Part 383) that every state exam is built on; exact question counts, fees, and procedures vary by state and change over time — the official site is always the authority.
More Ohio practice tests
Full prep courses are one-time from $59 with 12 months of access — mytruckcess.com/cdl.
CDL practice tests by state · Meet the Course Director · The completion certificate