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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 Tennessee hazmat test consists of 30 questions. To pass, you must correctly answer at least 24 questions (80%). The TN CDL hazmat test covers the information found in the Tennessee 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 a common cause of truck fires?
Short circuits due to loose connections.
loose fuel connections.
Under-inflated tires and duals that touch.
All of the above.
2. Shipping papers:
must be kept in electronic form.
must specify what hazmat is being transported.
must be placed on all sides of the vehicle.
should not be placed in the cab.
3. To be classified as non-bulk packaging, a packaging must have:
a water capacity greater than 454 kg (1,000 pounds) or less as a receptacle for a gas.
a maximum capacity of 450 L (119 gallons) or less as a receptacle for a liquid.
a maximum net mass less than 400 kg (882 pounds) and a maximum capacity of 450 L (119 gallons) or less as a receptacle for a solid.
All of the above.
4. Which of the following is NOT a reason for hydraulic brake failure?
Loss of hydraulic pressure
Brake fade on long hills
Stab braking
All of the above.
5. Move-over laws require drivers to _________ when approaching an emergency vehicle stopped on the roadside or a work zone.
slow down and change lanes
change direction
sound their horn
6. Containers of hazardous materials must:
be opened regularly to check their contents.
be made of cardboard.
not be braced.
None of the above.
7. After an accident, an improper use of flares could cause:
the vehicle to slide back and forth.
the springs to put on the brakes.
a fire if spilled fuel is on the ground.
air pressure to build from 50 to 100 psi within 2 minutes.
8. Checking the automatic transmission fluid level may require:
the engine to be running.
the vehicle to be parked downhill.
you to pump the brake.
the 4-way emergency flashers to be activated.
9. If you're carrying hazardous materials and are stopped at a truck stop, you should:
keep the shipping papers with you.
leave the shipping papers on the dashboard in clear view.
leave the shipping papers in the driver’s door pouch or on the driver’s seat.
tuck the shipping papers under your windshield wiper.
10. A vehicle inspection should be done:
once every month.
the same way each time so you are less likely to forget something.
differently each time, so you are less likely to forget something.
by a helper whenever possible.
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TN CDL Hazmat Test

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