2026 Nebraska DMV Air Brakes Class A Test 1 (25 Questions And Complete Answers)
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Terms in this set
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Foundation brakes are used:
1. Only at the front wheels.
2. Only at the rear wheels.
3. Only at the driver’s side wheels.
4. At each wheel.
1. Only at the front wheels.
2. Only at the rear wheels.
3. Only at the driver’s side wheels.
4. At each wheel.
At each wheel.
A tank endorsement is:
1. Only required when transporting gases.
2. Only required when transporting liquids.
3. Used when transporting both liquids and gases.
4. Optional when transporting hazardous materials.
1. Only required when transporting gases.
2. Only required when transporting liquids.
3. Used when transporting both liquids and gases.
4. Optional when transporting hazardous materials.
Used when transporting both liquids and gases.
If you’re driving and the ABS warning light comes on, it means:
1. The ABS is working properly.
2. The ABS has just been activated.
3. The ABS is not working properly.
4. The ABS needs to be activated.
1. The ABS is working properly.
2. The ABS has just been activated.
3. The ABS is not working properly.
4. The ABS needs to be activated.
The ABS is not working properly.
When you press the brake pedal in a vehicle with S-cam brakes, air pressure pushes out the rod and moves the:
1. Slack adjuster.
2. Axle.
3. Brake drum.
4. Alcohol evaporator.
1. Slack adjuster.
2. Axle.
3. Brake drum.
4. Alcohol evaporator.
Slack adjuster.
You should test the low pressure warning signal by:
1. Turning on the engine and applying the trailer hand brake.
2. Rapidly pressing and releasing the brake pedal.
3. Removing wheel chocks and disengaging the parking brake.
1. Turning on the engine and applying the trailer hand brake.
2. Rapidly pressing and releasing the brake pedal.
3. Removing wheel chocks and disengaging the parking brake.
Rapidly pressing and releasing the brake pedal.
The leakage rate for a single vehicle with air brakes should be no more than ____ in one minute during a static leakage test.
1. 1 psi
2. 2 psi
3. 3 psi
1. 1 psi
2. 2 psi
3. 3 psi
2 psi
Which of the following is not part of a vehicle’s air brake system?
1. Air gauges
2. Low pressure warning device
3. Air filter
1. Air gauges
2. Low pressure warning device
3. Air filter
Air filter
What should happen if the air pressure in the air brake system tanks falls below 60 psi?
1. A warning light should come on.
2. Lights should flash on the outside of the vehicle.
3. A message should appear on the control panel.
4. The vehicle should stop.
1. A warning light should come on.
2. Lights should flash on the outside of the vehicle.
3. A message should appear on the control panel.
4. The vehicle should stop.
A warning light should come on.
What can happen if the air pressure gets too low in an air brake system?
1. The brakes may squeak.
2. The brakes may not work.
3. The brakes may be sluggish.
4. The brakes will be very sensitive.
1. The brakes may squeak.
2. The brakes may not work.
3. The brakes may be sluggish.
4. The brakes will be very sensitive.
The brakes may not work.
When you are about to start down a hill, you should switch into a ____ gear.
1. Higher
2. Faster
3. Lower
1. Higher
2. Faster
3. Lower
Lower
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