2026 Nebraska DMV Combination Class A Test 1 (25 Questions And Complete Answers)
1 / 25
Terms in this set
25
Which type of vehicle is most prone to the “crack-the-whip” effect?
1. A five-axle tractor semi-trailer
2. A three-axle tractor semi-trailer
3. A bobtail tractor
4. A triple trailer
1. A five-axle tractor semi-trailer
2. A three-axle tractor semi-trailer
3. A bobtail tractor
4. A triple trailer
A triple trailer
Trailers with low underneath clearance can present challenges when driving over:
1. Bridges.
2. Railroad tracks.
3. Overpasses.
1. Bridges.
2. Railroad tracks.
3. Overpasses.
Railroad tracks.
When entering or crossing traffic while driving a combination vehicle, it is especially important that you:
1. Sound your horn.
2. Make sure there is a large enough gap for your vehicle.
3. Expect other drivers to make room for your vehicle.
4. Let other drivers wave you into their lane.
1. Sound your horn.
2. Make sure there is a large enough gap for your vehicle.
3. Expect other drivers to make room for your vehicle.
4. Let other drivers wave you into their lane.
Make sure there is a large enough gap for your vehicle.
Place the trailer air supply control in its "emergency" position to test:
1. The trailer emergency brakes.
2. A coupling device.
3. The anti-lock brakes.
1. The trailer emergency brakes.
2. A coupling device.
3. The anti-lock brakes.
The trailer emergency brakes.
The ____ trailer is the most likely to turn over if a driver takes a turn too quickly.
1. Front
2. Last
3. Middle
1. Front
2. Last
3. Middle
Last
How many air lines does a combination vehicle have?
1. One
2. Two
3. Three
4. Four
1. One
2. Two
3. Three
4. Four
Two
The service air line is attached to the:
1. Relay valves.
2. Supply line.
3. Emergency air line.
4. Steering wheel.
1. Relay valves.
2. Supply line.
3. Emergency air line.
4. Steering wheel.
Relay valves.
Push in the trailer air supply control to:
1. Activate the emergency brakes.
2. Deactivate the air brakes.
3. Sound the horn.
4. Supply the trailer with air.
1. Activate the emergency brakes.
2. Deactivate the air brakes.
3. Sound the horn.
4. Supply the trailer with air.
Supply the trailer with air.
What is a tractor protection valve?
1. A valve to keep air in the brake system should there be a bad leak
2. A valve that prevents a truck from being stolen
3. A valve that prevents the driver from driving too fast
1. A valve to keep air in the brake system should there be a bad leak
2. A valve that prevents a truck from being stolen
3. A valve that prevents the driver from driving too fast
A valve to keep air in the brake system should there be a bad leak
Pushing in the trailer air supply control will:
1. Supply the trailer with air.
2. Deactivate the air brakes.
3. Prevent the vehicle from skidding.
1. Supply the trailer with air.
2. Deactivate the air brakes.
3. Prevent the vehicle from skidding.
Supply the trailer with air.
Showing the first 10 terms. Use the flashcard player above to study all 25 terms!