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Basic Flashcards

7 cards from real Air Brake Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Basic flashcards as text

  1. What holds a spring brake in the released position during normal driving?

    Answer: Air pressure

    Air pressure compresses the power spring to keep spring brakes released.

  2. What happens to spring brakes if system air pressure drops too low?

    Answer: They automatically apply

    Spring brakes apply automatically when air pressure falls too low.

  3. How should you test the service brakes during a pre-trip air brake check?

    Answer: Roll forward slowly and apply the brake pedal firmly

    Move forward at low speed and apply the brakes to confirm they stop the vehicle and do not pull.

  4. What is brake fade in an air brake system?

    Answer: Loss of braking power from overheated brakes

    Brake fade is reduced stopping power caused by excessive heat from prolonged braking.

  5. What is the proper braking technique on a long, steep downgrade?

    Answer: Use a low gear and light, steady brake application

    Select a low gear for engine braking and use steady, controlled brake applications.

  6. What does the air pressure gauge in the cab show the driver?

    Answer: The amount of pressure in the air tanks

    The gauge displays the air pressure available in the reservoir tanks.

  7. Why do air brakes have a slight time lag compared to hydraulic brakes?

    Answer: Air must travel through the lines before brakes apply

    It takes a brief moment for air to move through the lines and apply the brakes.