Driving And Braking

16 Questions

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Driving Quizzes & Trivia

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Questions and Answers
  • 1. 
    A truck with air brakes going 55 mph would require a stopping distance of
    • A. 

      100-300 feet

    • B. 

      More than 300 feet

    • C. 

      Less than 100 feet

    • D. 

      All of the above

  • 2. 
    The spring brakes used on tractors and straight trucks will bring your truck to a stop when the air pressure drops below ______ psi
    • A. 

      100

    • B. 

      60

    • C. 

      20

    • D. 

      None of the above

  • 3. 
    The air brakes lag distance at 55 mph on dry pavement adds about ________ feet to your stopping distance
    • A. 

      12

    • B. 

      32

    • C. 

      52

    • D. 

      None of the above

  • 4. 
    Excessive heat in the brakes can cause the 
    • A. 

      Brakes to fade or fail

    • B. 

      Modulating control valve to wear out

    • C. 

      Brake lines to plug

    • D. 

      All of the above

  • 5. 
    You are on a steep downgrade and have reached your "safe" speed of 40mph you would apply the service brakes until your speed drops to _______ mph
    • A. 

      35

    • B. 

      30

    • C. 

      25

    • D. 

      All of the above

  • 6. 
    Air braking takes more time than hydraulic braking because air
    • A. 

      Brakes use different drums

    • B. 

      Brakes require heavier return springs

    • C. 

      Takes more time to flow through the lines than hydraulic fulid

    • D. 

      All of the above

  • 7. 
    Total stopping distance for vehicles with air brakes is longer than that for vehicles with hydraulic brakes due to __________ distance
    • A. 

      Effective braking

    • B. 

      Brake lag

    • C. 

      Reaction

    • D. 

      None of the above

  • 8. 
    The use of air brakes on a downgrade is only a supplement to the 
    • A. 

      Braking effect of the engine

    • B. 

      Use of the spring brakes

    • C. 

      Use of the front brake limiting valve

    • D. 

      All of the above

  • 9. 
    The proper method of braking when going down long and/or steep grades after electing the proper gear, is to brake until your speed is about ______ miles per hour below your "safe" speed, then release your brakes
    • A. 

      15

    • B. 

      10

    • C. 

      5

    • D. 

      None of the above

  • 10. 
    Which of these is not a proper time to apply the parking brakes?
    • A. 

      When you will only be stopped for less than one hour

    • B. 

      When your brakes are very hot

    • C. 

      When you are gong to test the parking brake

    • D. 

      All of the above

  • 11. 
    You should know your brakes are fading when 
    • A. 

      You have to push the brake pedal harder to control speed on a downgrade

    • B. 

      The brake pedal feels "spongy" when you apply pressure

    • C. 

      Your speed increases when you reduce pressure on your brake pedal

    • D. 

      All of the above

  • 12. 
    What is emergency stab braking
    • A. 

      Use light steady pressure on the brake pedal

    • B. 

      Brake hard, release the brakes when the wheels lock, and reapply the brakes when the wheels start rolling

    • C. 

      Press hard on the brake pedal and apply full hand valve until you stop

    • D. 

      All of the above

  • 13. 
    The most important thing to do when a low air pressure warning comes on is
    • A. 

      Downshift

    • B. 

      Upshift

    • C. 

      Stop an safely park as soon as possible

    • D. 

      All of the above

  • 14. 
    If you must make an emergency stop, brake so you
    • A. 

      Can steer and your vehicle stays in a straight line

    • B. 

      Use the hand brake before the brake pedal

    • C. 

      Use the full power of the brakes to lock them

    • D. 

      All of the above

  • 15. 
    Repeatedly pressing and releasing (fanning) the brake pedal may result in
    • A. 

      No change in brake air pressure

    • B. 

      A build up of brake air pressure

    • C. 

      The loss of brake air pressure

    • D. 

      All of the above

  • 16. 
    Emergency controlled braking is when you 
    • A. 

      Apply the hand valve for one second, then push hard on the brake pedal

    • B. 

      Apply the brakes as hard as you can without locking the wheels

    • C. 

      Brake as hard as you can release the brakes when the wheels lock, and put the brakes back on again when the wheels when the wheels start rolling

    • D. 

      None of the above