2026 Michigan DMV Air Brakes Class A Test 2 (25 Questions And Complete Answers)
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When traveling down a steep downgrade:
1. The air brakes should be used.
2. The vehicle should be placed in a low gear and the driver should use engine braking.
3. The driver should continually downshift instead of using the brakes.
1. The air brakes should be used.
2. The vehicle should be placed in a low gear and the driver should use engine braking.
3. The driver should continually downshift instead of using the brakes.
The vehicle should be placed in a low gear and the driver should use engine braking.
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
In a vehicle with dual parking control valves, a separate air tank can be used:
1. To make the air brakes work more effectively.
2. To temporarily release the spring brakes.
3. To charge the brakes on the rear trailer.
1. To make the air brakes work more effectively.
2. To temporarily release the spring brakes.
3. To charge the brakes on the rear trailer.
To temporarily release the spring brakes.
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.
During an applied leakage test, the maximum leakage rate for a triple combination vehicle is ____ in a minute.
1. 2 psi
2. 4 psi
3. 6 psi
1. 2 psi
2. 4 psi
3. 6 psi
6 psi
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.
What tells you how much pressure is in your vehicle's air tanks?
1. The supply pressure gauge
2. The ABS malfunction lamp
3. The tractor protection valve
1. The supply pressure gauge
2. The ABS malfunction lamp
3. The tractor protection valve
The supply pressure gauge
On flat surfaces, wheel chocks:
1. Can be used to prevent a parked vehicle from moving.
2. Make it easier for a parked vehicle to roll.
3. Should only be used on the front driver's side tire.
1. Can be used to prevent a parked vehicle from moving.
2. Make it easier for a parked vehicle to roll.
3. Should only be used on the front driver's side tire.
Can be used to prevent a parked vehicle from moving.
Before driving a vehicle with air brakes, you should ensure that the ____ come on automatically when air pressure falls below 45 psi.
1. Spring brakes
2. Parking brakes
3. Air brakes
1. Spring brakes
2. Parking brakes
3. Air brakes
Spring brakes
Air tank drains:
1. Should not be used in cold weather.
2. Are helpful to remove water and oil from the air tanks.
3. Are used to move air to the brakes.
1. Should not be used in cold weather.
2. Are helpful to remove water and oil from the air tanks.
3. Are used to move air to the brakes.
Are helpful to remove water and oil from the air tanks.
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