Your truck has no cylinder racks and you're loading compressed gas cylinders. How must they ride?
Right! Cylinders must be held upright in racks or boxes, unless designed to lie flat with the relief valve in vapor space. 📖 p. 9-11
From Section 9 of the Ohio Commercial Driver License Manual
Ohio CDL Hazardous Materials Practice Test
Who takes it: every CDL class (A, B and C), for the H endorsement.
Hauling placarded hazardous materials. 30 questions, 24 right to pass (80%).
Practice Hazardous Materials
- 10questions a round
- 2manual sections
Take the Hazardous Materials test
- 30questions
- 24correct to pass
- –no test taken yet
A Hazardous Materials question to try
Tap an answer to see if you’re right, and the page
Where it is in the Ohio Commercial Driver License Manual
Ohio answers about this test
Practice material, not the official test: check every answer in your state's current handbook. Disclaimer · How the rounds work · BMV
All Ohio CDL tests
- General Knowledge
- Combination Vehicles
- Air Brakes
- Doubles and Triples
- Passenger
- School Bus
- Tank Vehicles
- Hazardous MaterialsYou're here
- Which tests do you need?Pick what you'll drive and get your Ohio CDL plan, in order.