cdl air brakes

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  1. if your truck or bus has dual parking control valves it means that you can use pressure from a separate tank to
    release the spring brakes to move a short distance
  2. a striaght truck or bus air brakessystem should not leak at a rate of more than ____ psi per minute with the engine off and the brakes released.
  3. if your vehicle has an alcohol evaporator, it is there to :
    reduce the risk of ice in air brakes valves in cold weather
  4. if you must make an emergency stop you should brake so that you:
    stay in a straight line and can steer
  5. your truck or bus has a dual brake system. if a low air pressure warning comes on for only one system, what should you do?
    stop. safely park, and continue only after the system is fixed.
  6. if your vehicle has an alcohol evaporator, every day during cold weather you should:
    check and fill the alcohol level
  7. during normal driving, spring brakes are usually held back by :
    air pressure
  8. air brakes takes more time than hydraulic braking because air brakes:
    need to have airflow through the lines to work
  9. in air brakes vehicles, the parking brakes should be used:
    whenever the vehicle is parked.
  10. the brake pedal in an air brake system:
    controls the air pressure applied to put on the brakes.
  11. which of the fooling makes the total stopping distance for air brakes longer than for hydraulic brakes.
    brake lag distance
  12. of the choices below , the first thing to do when a low air pressure warning come on is :
    stop and safely park as soon as possible
  13. the braking power of the spring brakes:
    depends on the adjustment of the service brakes
  14. the air compressor governor controls:
    when air is pumped onto the air tanks
  15. the application pressure guage shows the driver how much pressure:
    is being applied to the brakes.
  16. when driving down a long steep hill you should:
    release the brake when u are 5mph below your
  17. the brakes systems that applies and releases the brakes when the driver uses the brake pedal is the :
    service brake system
  18. the most common type of foundation brakes found on heavy vehicles is the:
    s-cam drum
  19. vehicles with air brakes must have:
    an air pressure guage to show the pressure avaiable for braking.
  20. the driver must be able to see a warning that is given before air pressure in the service air tanks falls below:
  21. air loss in a straight truck or bus should not be more than ___ with the engine off and the brakes on.
    3 psi in one minute
  22. to make an emergency stop with air brakes, using the stab braking method, you should:
    brake as hard as you can,get off the brakes when the wheels lock,get back on the brakes when the wheels start rolling again.
  23. you should know that your brakes are fading when:
    you have to push harder on the brake pedal to control to control your speed on a downgrade.
  24. to check the free play of manual slack adjusters on s-cam brakes you should:
    park on level ground, chock the wheels, and release the parking brakes.
  25. if the air compressor should develop a leak, what keeps the air in the tanks?
    the one way check valve
Card Set
cdl air brakes
air brakes
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