2026 Hawaii DMV Air Brakes Class B Test 2 (25 Questions And Complete Answers)
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Terms in this set
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Which of the following is not part of a vehicle’s air brake system?
1. Air gauges
2. Low pressure warning device
3. Air filter
1. Air gauges
2. Low pressure warning device
3. Air filter
Air filter
In a vehicle with dual air brakes, a leak in one system ____ the second system.
1. Will always affect
2. May not affect
3. Is caused by
1. Will always affect
2. May not affect
3. Is caused by
May not affect
Lights that indicate that anti-lock brakes are not working are:
1. Gray.
2. Blue.
3. Yellow.
1. Gray.
2. Blue.
3. Yellow.
Yellow.
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.
The parking brake in a newer vehicle is applied by:
1. Moving a lever to the right.
2. Pushing a yellow, diamond-shaped knob.
3. Pulling a yellow, diamond-shaped knob.
1. Moving a lever to the right.
2. Pushing a yellow, diamond-shaped knob.
3. Pulling a yellow, diamond-shaped knob.
Pulling a yellow, diamond-shaped knob.
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.
The ____ between an air compressor and reservoir tank prevents air from escaping if the air compressor has a leak.
1. Slack adjuster
2. One-way check valve
3. Tractor protection valve
1. Slack adjuster
2. One-way check valve
3. Tractor protection valve
One-way check valve
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.
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.
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.
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