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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 Oregon hazmat test consists of 30 questions. To pass, you must correctly answer at least 24 questions (80%). The OR CDL hazmat test covers the information found in the Oregon 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. Which of the following is NOT a reason for hydraulic brake failure?
Loss of hydraulic pressure
Stab braking
Brake fade on long hills
All of the above.
2. To obtain the HazMat endorsement, you must pass a ________ background check.
Transportation Security Administration
Federal Bureau of Investigation
Local Department of Security
Law Enfrocement Agency
3. Move-over laws require drivers to _________ when approaching an emergency vehicle stopped on the roadside or a work zone.
sound their horn
change direction
slow down and change lanes
4. Overloading can have bad effects on all of the following except:
Speed control
Exhaust system
5. If the letter "G" appears in Column 1 of the Hazardous Materials Table, the description must also include:
the hazard class or division.
the source of the HazMat.
the shipper's name.
the technical name of the HazMat.
6. To avoid rollbacks when you start, you should:
if you have manual transmission, partly engage the clutch before you take your right foot off the brake.
release the parking brake only when you have applied enough engine power.
put on the parking brake whenever necessary.
All of the above.
7. What is the most important reason to inspect your vehicle?
Vehicle inspection is required by federal and state laws.
Saving money by preventing costly repairs.
Achieving the best gas mileage.
Your safety and that of other road users.
8. 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.
If there is a fire, warn everyone of the danger of explosion.
All of the above.
9. Placards must be placed:
on the front only.
on the driver's side of the vehicle.
on the rear only.
on the front, rear and both sides of the vehicle.
10. If hazardous materials are spilling from your vehicle while you are driving, after parking the vehicle do NOT:
try to find the source of the leak by smell.
send someone else for help.
secure the area.
stay there.
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OR CDL Hazmat Test

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