2026 Free California DMV Class A Air Brakes Endorsement Test 1 (25 Questions And Complete Answers)
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Using the brakes creates heat. If too much heat is produced:
1. The brakes may not work.
2. The brakes may squeak more than usual.
3. The brakes will brake unevenly.
1. The brakes may not work.
2. The brakes may squeak more than usual.
3. The brakes will brake unevenly.
The brakes may not work.
What do the two systems of a dual air brake system share?
1. Hoses
2. An air compressor
3. Air tanks
1. Hoses
2. An air compressor
3. Air tanks
An air compressor
What do air brakes use to make the brakes work?
1. Compressed air
2. Outside air
3. Non-compressed air
1. Compressed air
2. Outside air
3. Non-compressed air
Compressed air
What is removed when an air tank is drained?
1. Water and oil
2. Ammonia
3. Liquid cleaners
1. Water and oil
2. Ammonia
3. Liquid cleaners
Water and oil
If the low air pressure warning signal comes on in a vehicle with air brakes, the driver should:
1. Test the brakes while driving, but continue driving if nothing seems wrong.
2. Immediately stop driving.
3. Drive with the hazard lights activated.
1. Test the brakes while driving, but continue driving if nothing seems wrong.
2. Immediately stop driving.
3. Drive with the hazard lights activated.
Immediately stop driving.
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.
Air pressure should build up in a single air system within:
1. 15 minutes.
2. 12 minutes.
3. Three minutes.
1. 15 minutes.
2. 12 minutes.
3. Three minutes.
Three minutes.
In a dual air brake system, a leak in one system:
1. Always means there are leaks in both systems.
2. May not affect the other system.
3. Is not something to worry about.
1. Always means there are leaks in both systems.
2. May not affect the other system.
3. Is not something to worry about.
May not affect the other system.
When you press the brake pedal in a vehicle with S-cam brakes, air pressure pushes out the rod and moves the:
1. Slack adjuster.
2. Axle.
3. Brake drum.
1. Slack adjuster.
2. Axle.
3. Brake drum.
Slack adjuster.
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.
1. 125 psi.
2. 100 psi.
3. 150 psi.
125 psi.
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