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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. When driving in heavy traffic, the safest speed is:
half the speed of the other vehicles.
faster than the other vehicles.
slower than the other vehicles.
the same speed as the other vehicles.
2. If HazMat is spilling from your vehicle while you are driving, you should:
continue driving in order to find a truck stop.
get out of the vehicle and try to identify the source of the leak by smell.
not move your vehicle any more than safety requires.
continue driving in order to find a phone booth.
3. An ABS system:
helps you avoid skids caused by over braking.
keep your wheels from locking when you brake hard.
gives you more control over the vehicle during braking.
All of the above.
4. What is used to warn others of HazMat?
Emergency packages
Flashing lights
Security envelopes
5. Confused drivers may:
change direction suddenly.
change lanes for no apparent reason.
stop without warning.
All of the above.
6. Most heavy vehicles require ________ change gears.
double clutching
single clutching
triple shifting
double shifting
7. If you are being tailgated, you should do all of the following except:
Reduce your speed gradually
Try to let the other vehicle pass
Increase your following distance
Turn on your taillights
8. When driving on slippery surfaces, a lack of spray from other vehicles indicates that:
there is no ice on the road surface.
the pavement is dry.
the road hasn't started to ice up yet.
ice has formed on the road.
9. Most heavy-duty vehicles use:
solid brakes.
pressure brakes.
air brakes.
hydraulic brakes.
10. If your placarded trailer has dual tires, you should check the tires:
once every 24 hours.
once every hundred miles.
once a year.
at the beginning of each trip and each time the vehicle is parked.
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TN CDL Hazmat Test

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