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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 shipping paper for HazMat must include:
page numbers if the shipping paper has more than 1 page.
a proper shipping description for each HazMat.
All of the above.
2. When driving in very hot weather, you may have to:
increase your speed until the tires cool off.
decrease your following distance.
reduce your speed to prevent overheating.
3. Which of the following could cause poisonous carbon monoxide to enter the cab?
Lack of engine coolant
Lack of engine oil
Exhaust system leaks
4. The manifest for transporting hazardous wastes must be:
attached to the appropriate placard.
appear on both sides and ends of the vehicle.
signed by hand.
5. Hazardous materials are labelled with a __________ label.
6. The best advice for driving in fog is:
use low beams.
don't drive.
use high beams.
7. Before entering an intersection, make sure that:
there's enough room to get at least halfway across.
there is sufficient space to clear it.
accelerate smoothly and change gears as necessary.
8. NEVER smoke within _______ of any vehicle which contains classes 1, 2, 3 or 4.
50 feet
25 feet
100 feet
9. When more cargo is piled up in a truck, the center of gravity moves:
to the left side of the truck.
closer to the ground.
higher up from the road.
10. If your vehicle has a breakdown or accident while carrying explosives, what should you do?
Warn others of the danger.
Do not allow smoking or open fire near the vehicle.
All of the above.
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IA CDL Hazmat Test

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