2026 Maryland DMV Air Brakes Class A Test 1 (25 Questions And Complete Answers)
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To inspect slack adjusters on S-cam brakes, you need to:
1. Park on a hill and test the brakes.
2. Put on gloves and push in the slack adjusters.
3. Remove the drum and look inside.
4. Chock the wheels and disengage the parking brake.
1. Park on a hill and test the brakes.
2. Put on gloves and push in the slack adjusters.
3. Remove the drum and look inside.
4. Chock the wheels and disengage the parking brake.
Chock the wheels and disengage the parking brake.
Failing to drain the tanks in an air brake system can result in:
1. Water freezing and causing brake failure.
2. Squishy brakes.
3. Too much air collecting.
4. Too much fuel being carried.
1. Water freezing and causing brake failure.
2. Squishy brakes.
3. Too much air collecting.
4. Too much fuel being carried.
Water freezing and causing brake failure.
When leaving your vehicle unattended:
1. The parking brake should be used.
2. The parking brake only needs to be used if the vehicle is parked on a slope.
3. The parking brake should not be used, as it can damage the tires.
1. The parking brake should be used.
2. The parking brake only needs to be used if the vehicle is parked on a slope.
3. The parking brake should not be used, as it can damage the tires.
The parking brake should be used.
What is brake lag?
1. The time required for the brakes to work after the brake pedal is pressed
2. The distance between the brake pedal and the floor
3. The amount of air pressure used to stop the vehicle
1. The time required for the brakes to work after the brake pedal is pressed
2. The distance between the brake pedal and the floor
3. The amount of air pressure used to stop the vehicle
The time required for the brakes to work after the brake pedal is pressed
An air compressor governor will stop the compressor from pumping air once the air tanks have an air pressure level of:
1. 125 psi.
2. 100 psi.
3. 150 psi.
4. 80 psi.
1. 125 psi.
2. 100 psi.
3. 150 psi.
4. 80 psi.
125 psi.
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.
To make a stop in a vehicle using air brakes, the driver should:
1. Press down the brake pedal.
2. Lift the brake pedal toward them.
3. Push in the brake knob.
4. Pull out the brake knob.
1. Press down the brake pedal.
2. Lift the brake pedal toward them.
3. Push in the brake knob.
4. Pull out the brake knob.
Press down the brake pedal.
What must be on an air tank in an air-braked vehicle?
1. A check valve
2. A lock
3. A trap door
4. An oxidizer
1. A check valve
2. A lock
3. A trap door
4. An oxidizer
A check valve
On newer vehicles, how do you put on the parking brake?
1. Move a lever to the right.
2. Push in the yellow, diamond-shaped knob.
3. Pull out the yellow, diamond-shaped knob.
4. Pull up on the steering column.
1. Move a lever to the right.
2. Push in the yellow, diamond-shaped knob.
3. Pull out the yellow, diamond-shaped knob.
4. Pull up on the steering column.
Pull out the yellow, diamond-shaped knob.
An Anti-Lock Braking System (ABS):
1. Is not available for vehicles with air brakes.
2. Is not helpful in most driving situations.
3. Can help you maintain control when braking.
1. Is not available for vehicles with air brakes.
2. Is not helpful in most driving situations.
3. Can help you maintain control when braking.
Can help you maintain control when braking.
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