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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 Louisiana hazmat test consists of 30 questions. To pass, you must correctly answer at least 24 questions (80%). The LA CDL hazmat test covers the information found in the Louisiana 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 statements about retarders is NOT correct?
You should turn the retarder off whenever the road is wet, icy, or snow covered.
Retarders help you avoid skids.
Retarders help slow a vehicle, reducing the need for using brakes.
Retarders reduce reduce brake wear.
2. If your vehicle has a breakdown or accident while carrying explosives, what should you do?
Warn others of the danger.
If there is a fire, warn everyone of the danger of explosion.
Do not allow smoking or open fire near the vehicle.
All of the above.
3. What is Gross Vehicle Weight?
The total weight of the cargo
The total weight of a single vehicle, excluding its load
The total weight of a single vehicle, including its load
The total weight of a combination of vehicles excluding the load
4. The hazardous materials identification number must appear on the shipping paper, on the package and:
on the back of the truck.
on the steering wheel.
on cargo tanks and other bulk packaging.
on the license plate.
5. If corrosive materials leak during transportation, the parts of the vehicle exposed to corrosives must:
be washed with water.
be washed with acid.
be washed with oil.
be left to air dry.
6. When you take a break in the middle of your trip, you should check:
heater, defroster and windshield wiper blades.
missing exhaust pipes.
gauges for signs of trouble.
tires, brakes, lights and cargo securement devices.
7. 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.
Assume that the height posted at the bridges is correct.
If no warnings are posted, assume there is enough clearance under the bridge and proceed slowly.
Go slowly, and take another route if you are not sure you can make it.
8. Rollovers happen when drivers:
brake too hard.
turn too slowly.
turn too fast.
stop too often.
9. Drivers of vehicles transporting HazMat should:
compare the shipping paper to the markings and labels.
ensure that all relevant placards are carried in the passenger compartment.
ensure that all packages are labeled as flammable materials.
All of the above.
10. When driving a 50 foot vehicle at 50 mph, how much space should you keep in front of you?
3 seconds
4 seconds
5 seconds
6 seconds
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LA CDL Hazmat Test

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