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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. If you get stuck on the railroad tracks, the first thing you should do is:
scream for help.
immediately get out of the cab and move away from the tracks.
stay in your vehicle and call 911.
2. If radioactive material is involved in a leak or broken package:
immediately contact the fire department.
do not touch the leaking package and drive to the nearest service station.
do not use the vehicle until it is cleaned.
3. If your placarded trailer has dual tires, you should check the tires:
once every 3 months.
once every 500 miles.
at the beginning of each trip and each time the vehicle is parked.
4. Hazardous materials should be loaded:
even if some packages are leaking.
near heat sources.
away from heat sources.
5. When loading hazardous materials:
wrap leaking packages in plastic before loading them.
do not use hooks or other tools which might damage containers or other packaging.
do not load hazardous materials away from heat sources.
6. The tire load rating is stated:
on the side of each tire.
inside the suspension system.
on each axle.
7. Placards identifying hazardous materials must be placed:
inside the cab.
inside the trailer.
on the outside of the vehicle.
8. You may not park a vehicle carrying hazardous materials within ____ feet of a bridge, tunnel, or building.
9. You are inspecting your vehicle during a trip. What should you do?
Check critical items such as tires, brakes, and lights.
Use your senses to check for problems.
All of the above.
10. After an accident, an improper use of flares could cause:
air pressure to build from 50 to 100 psi within 2 minutes.
the springs to put on the brakes.
a fire if spilled fuel is on the ground.
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OK CDL Hazmat Test

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