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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. Hazardous materials can be recognized by looking at the container's:
2. If your placarded trailer has dual tires, you should check the tires:
once a year.
once every 24 hours.
at the beginning of each trip and each time the vehicle is parked.
once every hundred miles.
3. Before moving a tank of hazardous materials, you must:
close all manholes and valves.
call the Chemical Transportation Emergency Center and tell them your destination.
send the shipping papers to the shipper.
All of the above.
4. 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.
make sure that the containers are not braced.
do not load hazardous materials away from heat sources.
5. Which of the following statements about portable tanks is TRUE?
The product is loaded or unloaded while the portable tanks are off the vehicle
They must show the lessee or owner's name
They are not permanently attached to a vehicle
All of the above.
6. What should you do if you doubt you have safe space to pass under a low bridge?
Increase the weight of your vehicle to clearing under the bridge.
If no warnings are posted, assume there is enough clearance under the bridge and proceed slowly.
Assume that the height posted at the bridges is correct.
Go slowly, and take another route if you are not sure you can make it.
7. A shipping paper for hazardous materials must include:
a proper shipping description for each hazardous material.
page numbers if the shipping paper has more than 1 page.
a shipper's certification, signed by the shipper, saying they prepared the shipment according to the regulations.
All of the above.
8. Drivers involved in transporting hazardous materials must:
keep hazardous materials shipping papers and emergency response information in the proper place.
make sure the shipper has identified, marked, and labeled the hazardous materials properly.
safely transport the shipment without delay.
All of the above.
9. You are transporting hazarous materials. During your en-route inspection, you find an overheated tire. What should you do?
use water to cool the tire, then check it every 50 miles.
wait at least 30 minutes before continuing your trip.
remove the tire and place it a safe distance from your vehicle.
None of the above.
10. When driving at night, you should dim your lights within ______ of an oncoming vehicle.
500 feet.
300 feet.
400 feet.
250 feet.
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CO CDL Hazmat Test

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