2026 Michigan DMV Air Brakes Class B Test 1 (25 Questions And Complete Answers)
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An application pressure gauge shows:
1. How much air pressure is being applied to the brakes.
2. How much air pressure is available.
3. How much air pressure is required to stop a vehicle.
1. How much air pressure is being applied to the brakes.
2. How much air pressure is available.
3. How much air pressure is required to stop a vehicle.
How much air pressure is being applied to the brakes.
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
What should happen before the air pressure in an air brake system tank falls below 55 psi?
1. The warning light should activate.
2. The vehicle will be unable to shift out of gear.
3. The front lights should flash.
1. The warning light should activate.
2. The vehicle will be unable to shift out of gear.
3. The front lights should flash.
The warning light should activate.
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.
What kind of brakes do most newer heavy-duty trucks use?
1. Single air brakes
2. Dual air brakes
3. Triple air brakes
1. Single air brakes
2. Dual air brakes
3. Triple air brakes
Dual air brakes
Friction in an S-cam brake is caused when the brake shoes and linings:
1. Press against the outside of the brake drum.
2. Press against the inside of the brake drum.
3. Push against each other.
1. Press against the outside of the brake drum.
2. Press against the inside of the brake drum.
3. Push against each other.
Press against the inside of the brake drum.
The rods in S-cam brakes move the slack adjusters when air pressure is added to the brake chambers. This air pressure is added to the chambers when the driver:
1. Presses the brake pedal.
2. Uses the emergency brake.
3. Uses the trailer hand valve.
1. Presses the brake pedal.
2. Uses the emergency brake.
3. Uses the trailer hand valve.
Presses the brake pedal.
Brakes can get out of adjustment quickly, especially:
1. If they are hot.
2. In the winter time.
3. If they are used frequently.
1. If they are hot.
2. In the winter time.
3. If they are used frequently.
If they are hot.
The leakage rate for a triple combination vehicle with air brakes should be no more than ____ in one minute during a static leakage test.
1. 8 psi
2. 5 psi
3. 3 psi
1. 8 psi
2. 5 psi
3. 3 psi
5 psi
The air compressor is connected to the:
1. Transmission.
2. Engine.
3. Radiator.
1. Transmission.
2. Engine.
3. Radiator.
Engine.
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