CDL Air Brakes Endorsement I Practice
.
- 1.Why must air tanks be drained?
- A.
To drain all the air out of the tank.
- B.
To drain moisture and oil out of the tank.
- C.
To keep anyone from moving the vehicle
- 2.What is a supply pressure gauge used for?
- A.
To tell you how much diesel is in the vehicle.
- B.
To tell you how much water is in the air tank.
- C.
To tell you how much air is in the air tank.
- 3.All vehicles with air brakes must have a low air pressure warning signal.
- A.
True
- B.
False
- 4.What are spring brakes?
- A.
Brakes used for parking
- B.
If the air brakes leak down, springs press the brakes on to stop the vehicle.
- C.
The spring on the brake pedal.
- 5.Front wheel brakes are good under all conditions.
- A.
True
- B.
False
- 6.When you put your brakes on the air brake system works with an electric switch, by air pressure to turn on the brake lights.
- A.
True
- B.
False
- 7.What do air brakes use to make the brakes work?
- A.
Compressed gas
- B.
Compressed oil
- C.
Compressed air
- 8.Air brakes are really three different braking systems: service brake, parking brake and emergency brake.
- A.
True
- B.
False
- 9.The service brake applies and releases:
- A.
The parking brake when you use the parking brake control.
- B.
The brake when you use the brake pedal during normal driving.
- C.
In the event of an emergency. In the event of an emergency. In the event of an emergency.
- 10.The parking brake applies and releases:
- A.
The brake pedal during normal driving.
- B.
In the event of an emergency.
- C.
The parking brakes when you use the parking brake control.
- 11.The emergency brake system:
- A.
Uses parts of the service and parking brake system to stop the vehicle in the event of a brake system failure.
- B.
Uses the service brake to stop the vehicle in the event of a brake system failure.
- C.
Uses the parking brake to stop the vehicle in the event of a brake system failure.
- 12.The governor controls when the air compressor will pump into the air storage tanks.
- A.
True
- B.
False
- 13.The air storage tanks are used to hold compressed air.
- A.
True
- B.
False
- 14.When you put on the brakes by pushing down the brake pedal:
- A.
The air pressure is reduced to the brake pads.
- B.
Air pressure is applied to the brake pads.
- C.
Compressed air is let go out of the system. Compressed air is let go out of the system. Compressed air is let go out of the system.
- 15.The S-cam forces the brake shoes away from one another and presses them against the inside of the brake drum. It is called the S-cam because:
- A.
It is shaped like the letter Z.
- B.
It is shaped like the letter N.
- C.
It is shaped like the letter S.
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