Hazardous materials rules for all drivers: Ohio CDL practice questions
Part of the General Knowledge test. We have 5 checked questions on this topic. Here are the key rules, and two to try.
Key facts
| Part of | the General Knowledge test (80% to pass) | 49 CFR 383.135 |
|---|---|---|
| Manual section | §2.23 Hazardous materials rules for all drivers | HSY 7605 p. 2-40 |
| Questions in CDL Mile's bank | 5 | CDL Mile, checked against HSY 7605 |
Key rules
- § 2.23.3p. 2-41
A tank endorsement is needed for a vehicle built to haul any liquid or gas in a tank of more than 119 gallons when the tanks total 1,000 gallons or more, mounted permanently or temporarily. A single 2,000-gallon tank is over both limits, and the cargo does not have to be hazardous.
Lists of Regulated Products
Try two questions
General Knowledge · Hazardous materials rules for all drivers
A vehicle's hazardous cargo requires placards. At a minimum, how many identical placards must it have, and where do they go?
Tap an answer to see the explanation and the manual page.
General Knowledge · Hazardous materials rules for all drivers
Why must hazardous materials shipping papers be clearly marked or kept on top of your other shipping papers?
Tap an answer to see the explanation and the manual page.
More General Knowledge topics
Sources
Ohio Commercial Driver License Manual (HSY 7605), revised July 2026, Ohio Bureau of Motor Vehicles. Page references are to its printed page numbers. CDL Mile is independent and not affiliated with the Ohio BMV.
Updated for the July 2026 Ohio CDL manual (HSY 7605). Last checked November 5, 2026.
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