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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 Colorado hazmat test consists of 30 questions. To pass, you must correctly answer at least 24 questions (80%). The CO CDL hazmat test covers the information found in the Colorado 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 good rule for using turn signals?
Cancel your signal after you have turned
Signal continuously
Cancel the signal before completing the turn
Signal early
2. Identification numbers are a 4 digit code used to identify hazardous materials. The identification number is preceded by the letters "NA" or "UN". The letters "NA" are associated with proper shipping names that are only used:
within the United States and North Africa.
within the United States and to and from Canada.
within the national borders.
3. For hazardous waste, shippers must keep a copy of shipping papers for _______  after the material is accepted by the initial carrier.
1 year
6 months
2 years
3 years
4. To know if your vehicle is equipped with ABS, look for:
the ABS logo on the steering wheel.
an ABS placard.
the ABS shipping paper.
a yellow ABS malfunction lamps on the instrument panel.
5. If you're feeling tired while driving you should:
eat something.
drink coffee.
increase your speed to get to your destination quicker.
stop driving and get some rest.
6. Class 2 hazardous materials include:
Flammable gases
Corrosive materials
Radioactive materials
7. Do you need to stop before a railroad-highway crossing if you are hauling 100 pounds of Division 4.3 (dangerous when wet) materials?
Only when you are driving and hear a siren coming.
Only if you are driving at night.
8. You are driving a vehicle with air brakes when the low air pressure warning light and buzzer come on. You should:
apply the brakes as hard as you can.
activate your hazard lights and drive to the nearest place where you can stop.
slow down and test your brakes.
pull off the road and stop immediately.
9. Who must mark and label the hazardous materials?
The driver
The shipper
The loader
The carrier
10. Which of the following is a common cause of truck fires?
Under-inflated tires and duals that touch.
loose fuel connections.
Short circuits due to loose connections.
All of the above.
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CO CDL Hazmat Test

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