CDL Air Brakes Endorsement I Practice

15 Questions

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CDL Air Brakes Endorsement I Practice

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Questions and Answers
  • 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.