2026 Maine DMV Air Brakes Class A Test 1 (25 Questions And Complete Answers)
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If air pressure drops to a level between ____, a visual low pressure warning signal should have already activated.
1. 55 and 75 psi.
2. 80 and 95 psi.
3. 65 and 100 psi.
1. 55 and 75 psi.
2. 80 and 95 psi.
3. 65 and 100 psi.
55 and 75 psi.
When leaving a vehicle unattended, a driver should:
1. Always set the parking brake.
2. Only set the parking brake if the vehicle is parked on a slope.
3. Deflate the tires by 10 percent.
1. Always set the parking brake.
2. Only set the parking brake if the vehicle is parked on a slope.
3. Deflate the tires by 10 percent.
Always set the parking brake.
An alcohol evaporator in an air brake system:
1. Makes the brakes work without squeaking.
2. Prevents ice from forming in the braking system.
3. Lubricates parts of the braking system.
1. Makes the brakes work without squeaking.
2. Prevents ice from forming in the braking system.
3. Lubricates parts of the braking system.
Prevents ice from forming in the braking system.
Vehicles equipped with Anti-Lock Braking Systems (ABS) have ____ malfunction lamps to indicate when the ABS is not working
1. Green
2. Blue
3. Yellow
1. Green
2. Blue
3. Yellow
Yellow
The ____ are activated by an electric switch that is triggered by the brake pedal.
1. Headlights
2. Turn signals
3. Brake lights
1. Headlights
2. Turn signals
3. Brake lights
Brake lights
When stopping in an emergency situation, you should:
1. Veer your trailer to the right and stop.
2. Stop in a straight line.
3. Veer your trailer to the left and stop.
1. Veer your trailer to the right and stop.
2. Stop in a straight line.
3. Veer your trailer to the left and stop.
Stop in a straight line.
Air storage tanks:
1. Are not allowed on a vehicle.
2. Hold compressed air for the brakes.
3. Should be drained of excess air after every trip.
1. Are not allowed on a vehicle.
2. Hold compressed air for the brakes.
3. Should be drained of excess air after every trip.
Hold compressed air for the brakes.
When parking, you should not use the parking brake if:
1. The brakes are very hot.
2. The brakes are very cold.
3. There is snow on the ground.
1. The brakes are very hot.
2. The brakes are very cold.
3. There is snow on the ground.
The brakes are very hot.
Once the air tanks are at an air pressure level of 125 psi, the air compressor governor will:
1. Stop the compressor from pumping air.
2. Release air from the tanks.
3. Begin pumping air into the tanks.
1. Stop the compressor from pumping air.
2. Release air from the tanks.
3. Begin pumping air into the tanks.
Stop the compressor from pumping air.
Having ABS on only one axle:
1. Can be dangerous.
2. Still allows you additional control when braking.
3. Slows the vehicle, but cannot stop it.
1. Can be dangerous.
2. Still allows you additional control when braking.
3. Slows the vehicle, but cannot stop it.
Still allows you additional control when braking.
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