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Any driver, regardless of the vehicle Class, who wants to haul hazardous materials, must add an “H” endorsement to their CDL. In order to obtain the Hazmat endorsement drivers are required to pass a Transportation Security Administration background check and a knowledge test. The Ohio hazmat test consists of 30 questions. To pass, you must correctly answer at least 24 questions (80%). The OH CDL hazmat test covers the information found in the Ohio CDL Manual. Study the chapter covering hazardous materials to learn how to recognize, handle, and transport Hazmat, then take this practice test to prepare for your exam!
1. You can determine if your vehicle is equipped with ABS (anti-lock braking system) by:
checking if your vehicle was manufactured after March 1, 1998.
checking for a yellow ABS malfunction lamp on the instrument panel.
All of the above.
2. In mountain driving, to select a safe speed you should:
follow the vehicle in front of you.
select a speed that's not too fast for the weight of your vehicle and cargo, the length and steepness of the grade, and road and weather conditions.
go 5 mph slower than the vehicle ahead.
3. How should you brake if your vehicle loses ABS?
Pump the brake repeatedly
Brake as you always have.
Step on and off the brake pedal several times
4. Two of the most common causes of tire fires are:
Driver smoking and bleeding tar.
Duals that touch and under-inflated tires.
Loose lug nuts and duals that touch.
5. If one of your tires is leaking, you should:
report it to your carrier before your trip.
not drive except to the nearest safe place to fix it.
drive at reduced speed and stop to check the tire every 15 miles.
6. If a shipping paper describes both hazardous and non-hazardous products, the hazardous materials must be:
listed at the bottom.
highlighted in a contrasting color.
in the same color as the non-hazardous materials.
7. Which of the following statements is true?
Poor cargo ventilation is a common cause of fire.
Carrying a properly charged and rated fire extinguisher will help prevent fires.
There is no way that short circuits due to damaged insulation can cause a vehicle fire.
8. When backing a truck you should:
look straight ahead.
always rely on your mirrors.
get out and walk around the vehicle before you begin to back.
9. Hazardous materials include all of the following except:
10. To prevent getting sleepy while driving, you should:
keep cool by opening the window.
keep the cab warm.
drive alone whenever possible.
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Hazmat CDL Test (OH)

Number of questions: 30
Correct answers to pass:24
Passing score:80%
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