2026 Hawaii DMV Air Brakes Class A Test 1 (25 Questions And Complete Answers)
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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
When an S-cam turns inside a brake drum, the S-cam:
1. Presses the brake shoes against the inside of the brake drum.
2. Presses the brake shoes against the brake linings.
3. Presses the brake linings against the wheel axles.
1. Presses the brake shoes against the inside of the brake drum.
2. Presses the brake shoes against the brake linings.
3. Presses the brake linings against the wheel axles.
Presses the brake shoes against the inside of the brake drum.
In a dual air brake system:
1. Air tanks are shared between both systems.
2. Each system has its own air tanks.
3. You must designate which system you are using.
1. Air tanks are shared between both systems.
2. Each system has its own air tanks.
3. You must designate which system you are using.
Each system has its own air tanks.
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
Lights that indicate that anti-lock brakes are not working are:
1. Gray.
2. Blue.
3. Yellow.
1. Gray.
2. Blue.
3. Yellow.
Yellow.
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.
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.
When operating a vehicle with a dual air brake system, the driver should:
1. Let the vehicle warm up before driving to ensure that the fuel reaches the engine.
2. Let the air compressor build up a minimum of 100 psi pressure in the primary and secondary systems before driving.
3. Begin driving just after the vehicle starts.
1. Let the vehicle warm up before driving to ensure that the fuel reaches the engine.
2. Let the air compressor build up a minimum of 100 psi pressure in the primary and secondary systems before driving.
3. Begin driving just after the vehicle starts.
Let the air compressor build up a minimum of 100 psi pressure in the primary and secondary systems before driving.
Brakes out of adjustment will:
1. Work properly.
2. Cause some of the brakes to overwork and malfunction.
3. Allow better acceleration.
1. Work properly.
2. Cause some of the brakes to overwork and malfunction.
3. Allow better acceleration.
Cause some of the brakes to overwork and malfunction.
Failing to drain air tanks could result in:
1. Water accumulations freezing and causing brake failure.
2. Squishy brakes.
3. Too much air collecting in the tanks.
1. Water accumulations freezing and causing brake failure.
2. Squishy brakes.
3. Too much air collecting in the tanks.
Water accumulations freezing and causing brake failure.
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