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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 Oklahoma hazmat test consists of 30 questions. To pass, you must correctly answer at least 24 questions (80%). The OK CDL hazmat test covers the information found in the Oklahoma 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. On a tractor-trailer equipped with a trailer brake hand valve, the hand valve can be used to:
keep from rolling back.
hold compressed air.
prevent movement of cargo.
2. After starting the engine, the ABS light stays on. This means:
the ABS is not working properly.
the ABS is in Neutral.
the ABS is working properly.
3. When moving Division 1.1 or 1.2 materials, the floor liner you use must be:
either non-metallic material or non-ferrous metal.
ferrous metal.
4. The hazardous materials regulations require vehicles transporting certain types or quantities of HazMat to display warning signs called:
reflective triangles.
HazMat warnings.
5. Confused drivers may:
stop without warning.
change direction suddenly.
All of the above.
6. Who is required to keep a record of hazardous materials training?
The local transportation agency
The person receiving the training
HazMat employers
7. If you are being tailgated, you should:
increase your following distance.
move to the left lane.
speed up.
8. Passive railroad crossings:
do not have traffic control devices.
have at least one traffic control device.
should never be crossed using a CMV.
9. If a shipping paper describes both hazardous and non-hazardous products, the hazardous materials must be:
in the same color as the non-hazardous materials.
listed at the bottom.
highlighted in a contrasting color.
10. Which of the following is true? If a HazMat is a Poison Inhalation Hazard:
the material will have special requirements for shipping papers.
a POISON INHALATION HAZARD placard must be used in addition to other placards.
All of the above.
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CDL Hazmat Test OK

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