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Tennessee
Tennessee CDL Combination 2
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Q.1
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What is a tractor protection valve?
A valve to keep air in the brake system should there be a bad leak
A valve that prevents the truck from being stolen
A valve that prevents the driver from going too fast
A valve that prevents the trailer from accidentally being released
Q.2
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Trailers built before ____ are not required to have spring brakes.
1985
1975
1999
Q.3
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When backing up your tractor while coupling it to a trailer, the trailer brakes should be:
Deactivated.
Locked.
Unlocked.
Q.4
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The trailer hand valve should:
Be used for parking.
Be used only to test the trailer brakes.
Be used together with the brake pedal.
Be used on slippery surfaces.
Q.5
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If you are operating a vehicle built before 1998 and are unsure if the trailer has an Anti-Lock Braking System (ABS), you can:
Check for wheel speed sensors coming from the back of the brakes.
Look for a red light on the front right corner of the converter dolly.
Pump the air brakes to activate the ABS.
Assume the vehicle has ABS.
Q.6
Submit
The trailer hand valve should be used:
To test the trailer brakes.
To check the connection between the trailer and tractor.
To accelerate.
Q.7
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When coupling:
You can assume all vehicles are the same.
Be sure that you are coupling correctly.
Cracks in the mounting are acceptable.
Q.8
Submit
If you use the trailer hand brake while your trailer is skidding, it will:
Stop the skid.
Straighten the trailer.
Continue the skid.
Q.9
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When glad hands are coupled, the seals should be pressed together at an angle of:
30 degrees.
45 degrees.
60 degrees.
90 degrees.
Q.10
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When connecting a converter dolly to a second or third trailer, the trailer height should be:
Slightly higher than the center of the fifth wheel.
Level with the center of the fifth wheel.
Slightly lower than the center of the fifth wheel.
Next to the center of the fifth wheel.
Q.11
Submit
To find out if a vehicle that was built before 1998 has an Anti-Lock Braking System (ABS), you can:
Pump the air brakes to activate the ABS.
Look into the back of the fifth wheel.
Check for wheel speed sensors coming from the back of the brakes.
Q.12
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What does the tractor protection valve do?
Protects the tractor from being stolen
Protects the tractor from exceeding a set speed
Keeps air in the braking system, should the trailer break away or develop a leak
Ensures oil adequately lubricates the engine
Q.13
Submit
If a trailer is too high:
It will not make a difference when coupling.
It may not couple correctly.
Coupling will be more secure.
Coupling will be easier.
Q.14
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Shut-off valves:
Prevent air from escaping air brake systems.
Prevent air from entering air brake systems.
Override vehicles that are out of control.
Q.15
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A trolley valve:
Should be used while driving.
Should only be used to test trailer brakes.
Should be used when parking uphill.
Q.16
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When a combination vehicle goes around a corner:
The vehicle must use at least two lanes.
The front and rear wheels will move in different paths.
It is best to allow the rear wheels to drive over the curb.
Q.17
Submit
To prevent a rollover, a driver should:
Keep cargo low.
Place cargo high.
Keep cargo loose.
Turn quickly.
Q.18
Submit
The ____ trailer is the most likely to turn over if a driver takes a turn too quickly.
Front
Last
Middle
Q.19
Submit
When entering or crossing traffic while driving a combination vehicle, it is especially important that you:
Sound your horn.
Make sure there is a large enough gap for your vehicle.
Expect other drivers to make room for your vehicle.
Let other drivers wave you into their lane.
Q.20
Submit
____ are the cause of more than half of all accident-related truck driver deaths.
Truck rollovers
Motorcycles
Slippery roads
Pedestrians
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