2026 Kentucky DMV Combination Class A Test 1 (20 Questions And Complete Answers)
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What is the tractor protection valve?
1. A valve that keeps air in the brake system should a bad leak occur
2. A valve that prevents the trailer from being accidentally released
3. A valve that prevents the vehicle from going too fast
1. A valve that keeps air in the brake system should a bad leak occur
2. A valve that prevents the trailer from being accidentally released
3. A valve that prevents the vehicle from going too fast
A valve that keeps air in the brake system should a bad leak occur
The trailer hand valve should be used:
1. To test the trailer brakes.
2. To check the connection between the trailer and tractor.
3. To accelerate.
1. To test the trailer brakes.
2. To check the connection between the trailer and tractor.
3. To accelerate.
To test the trailer brakes.
If you are backing and the trailer begins to drift off-course, the driver should:
1. Return the steering wheel to the 12 o’clock position.
2. Turn the top of the steering wheel in the direction of the drift.
3. Turn the top of the steering wheel in the direction opposite of the drift.
1. Return the steering wheel to the 12 o’clock position.
2. Turn the top of the steering wheel in the direction of the drift.
3. Turn the top of the steering wheel in the direction opposite of the drift.
Turn the top of the steering wheel in the direction of the drift.
The tractor protection valve:
1. Ensures that oil adequately lubricates the engine.
2. Protects the tractor from exceeding a set speed.
3. Keeps air in the truck braking system if the trailer develops a leak.
1. Ensures that oil adequately lubricates the engine.
2. Protects the tractor from exceeding a set speed.
3. Keeps air in the truck braking system if the trailer develops a leak.
Keeps air in the truck braking system if the trailer develops a leak.
When driving while pulling trailers, you should:
1. Make sudden turns with the steering wheel.
2. Avoid making sudden moves.
3. Push the accelerator to the floor when starting from a stop.
1. Make sudden turns with the steering wheel.
2. Avoid making sudden moves.
3. Push the accelerator to the floor when starting from a stop.
Avoid making sudden moves.
Fully-loaded rigs:
1. Are less likely to roll over than empty rigs.
2. Are more likely to roll over than empty rigs.
3. Are just as likely to roll over as empty rigs.
1. Are less likely to roll over than empty rigs.
2. Are more likely to roll over than empty rigs.
3. Are just as likely to roll over as empty rigs.
Are more likely to roll over than empty rigs.
The trailer hand valve:
1. Should always be used for parking.
2. Should only be used for parking on a downgrade.
3. Should never be used for parking.
1. Should always be used for parking.
2. Should only be used for parking on a downgrade.
3. Should never be used for parking.
Should never be used for parking.
If you are backing and become unsure about your path of travel, you should:
1. Continue backing.
2. Stop and get out to look.
3. Continue backing, but more slowly than before.
1. Continue backing.
2. Stop and get out to look.
3. Continue backing, but more slowly than before.
Stop and get out to look.
To prevent a rollover, cargo should be:
1. Loaded with most weight on the driver’s side of the trailer.
2. Placed near the rear of the trailer.
3. Spread out in the trailer.
1. Loaded with most weight on the driver’s side of the trailer.
2. Placed near the rear of the trailer.
3. Spread out in the trailer.
Spread out in the trailer.
Combination vehicles:
1. Often have taller trailers than single commercial vehicles.
2. Are usually lighter than single commercial vehicles.
3. Require more skill to drive than single commercial vehicles.
1. Often have taller trailers than single commercial vehicles.
2. Are usually lighter than single commercial vehicles.
3. Require more skill to drive than single commercial vehicles.
Require more skill to drive than single commercial vehicles.
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