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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 Iowa hazmat test consists of 30 questions. To pass, you must correctly answer at least 24 questions (80%). The IA CDL hazmat test covers the information found in the Iowa 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. A hazard class name or ID number may not be used to describe:
a reportable quantity of a hazardous material.
a non-hazardous substance.
hazardous waste.
2. If you doubt you have enough space to pass under a bridge, you should:
drive faster.
turn on your headlights.
go slowly.
3. Hazardous materials can be recognized by looking at the container's:
4. If you're carrying hazardous materials and are stopped at a truck stop, you should:
keep the shipping papers with you.
leave the shipping papers on the dashboard in clear view.
leave the shipping papers in the driver’s door pouch or on the driver’s seat.
5. If you get stuck on railroad tracks, you should:
have a helper push your vehicle.
stay in the vehicle and call for help.
get out of the vehicle and away from the tracks.
6. Most heavy-duty vehicles use:
solid brakes.
hydraulic brakes.
air brakes.
7. Explosives, flammable gases and flammable liquids should not be placed in a cargo space that has:
a heater.
an air conditioner.
8. 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
9. You should always try to back toward the driver's side because:
you can watch the rear of your vehicle out the side window.
backing toward the left side is more dangerous.
None of the above.
10. If you're feeling tired while driving you should:
drink coffee.
stop driving and get some rest.
eat something.
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CDL Hazmat Test IA

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