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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. When shippers package hazardous materials, they certify that the package has been prepared according to the rules. The only exceptions are when:
the sealed loads is provided by the carrier and the package cannot be inspected.
a shipper is a private carrier transporting their own product, and when the package is provided by the carrier.
a shipper is a private carrier transporting hazardous waste.
the package is clearly unsafe and does not comply with HMR rules.
2. If the diamond-shaped hazard warning label won't fit on a package, shippers may label the hazardous materials:
with a tag.
by placing the package in a hazmat container.
using a bar code instead.
All of the above.
3. Which of the following could cause poisonous carbon monoxide to enter the cab?
Wrong type of fuel
Exhaust system leaks
Lack of engine oil
Lack of engine coolant
4. When driving on slippery roads, you should NOT:
watch far enough ahead to keep a steady speed.
go slowly.
try to anticipate stops early.
use the engine brake.
5. When driving in heavy traffic, the safest speed is:
half the speed of the other vehicles.
slower than the other vehicles.
the same speed as the other vehicles.
faster than the other vehicles.
6. When traveling with Division 1.1, 1.2, or 1.3 explosives, do not park within _____ of a bridge.
50 feet
300 feet
100 feet
200 feet
7. When going down grades, you should:
downshift to a lower gear.
rely solely on engine braking to reduce your speed.
put the transmission in Neutral.
shift up.
8. If the words "Inhalation Hazard" appears on the shipping paper, the __________ placard must be displayed.
Reportable Quantity Hazard
Corrosive Materials
Liquid Gas
Poison Inhalation Hazard or Poison Gas
9. If you are at the scene of an incident involving hazardous materials, you should:
keep people far away and upwind.
avoid warn others of the danger as this could caus a panic attack.
write description of the scene on the shipping paper.
All of the above.
10. Which of the following is NOT a reason for hydraulic brake failure?
Brake fade on long hills
Stab braking
Loss of hydraulic pressure
All of the above.
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Hazmat CDL Test (CO)

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