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CDL EXAM 1 - ENGLISH

Quiz by CDL CLASSES

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73 questions
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  • Q1
    When should you use the hand valve to park a combination vehicle?
    To park on a grade.
    To park at loading docks.
    Never
    30s
  • Q2
    Which answer is correct for the air valves when testing the trailer service brakes only?
    Service Brake: off; Parking Brake: off; Trailer air supply: in /open; Trolley: applied
    Service Brake: off; Parking Brake: off; Trailer air supply: out; Trolley: applied
    Service Brake: off; Parking Brake: off; Trailer air supply: in / open; Trolley: released
    30s
  • Q3
    You are coupling a semi trailer to your tractor but have not yet backed under. The trailer is at the right height when what happens?
    The end of the kingpin is even with the top of the fifth wheel
    The trailer will be raised slightly when the tractor is backed under it
    The kingpin is about 1 1/4 inches above the fifth wheel
    30s
  • Q4
    How should you test the tractor-trailer connection for security?
    Put the tractor in gear and pull ahead with a sharp jerk
    Rock the trailer back and forth with the trailer brakes locked
    Pull gently forward in low gear against the locked trailer brakes, then inspect the coupling
    30s
  • Q5
    What happens when the emergency trailer brakes lose pressure?
    Air compressor to unload instead of pumping air
    Emergency trailer brakes will come on
    Trailer supply valve will open
    30s
  • Q6
    How do you supply air to the trailer tanks?
    Pulling out the trailer air supply valve
    Pulling out the system parking brakes
    Pushing in the trailer air supply valve
    30s
  • Q7
    There are two things that a driver can do to prevent a roll over: (1) keep the cargo as close to the ground as possible; and (2):
    Go slowly around turns
    Make sure that the brakes are properly adjusted
    Keep the fifth wheel's free play as tight as possible
    30s
  • Q8
    The fifth wheel locking lever is not locked after the jaws close around the kingpin; this means:
    You can set the fifth wheel for weight balance
    The coupling is not right and should be fixed before driving the coupled unit
    The parking lock is off, and you may drive away
    30s
  • Q9
    What must you do before you start to uncouple?
    Call in for any special requests.
    Make sure the ground is solid and can support the weight of the trailer.
    Make sure the trailer has enough of an air supply for its brakes to hold.
    30s
  • Q10
    During uncoupling, you should disconnect the electrical cable and also:
    Hang it with the plug down.
    Hang it with the plug up.
    Coil it to keep it out of the way.
    30s
  • Q11
    If your vehicle is equipped with air brakes and has a trailer, which of the following do you need to make sure that are locked in place and free of damage of air leaks?
    Lug nuts
    Pins
    Glad hands
    30s
  • Q12
    What should you do if your vehicle gets stuck on a railroad track?
    Radio in for assistance.
    Honk your horn loudly and call 911 or the posted emergency number.
    Get away from your vehicle and call 911 or the posted emergency number.
    30s
  • Q13
    What happens when the tractor protection valve is successfully tested?
    The parking brake will pop out or go from "normal" to "emergency."
    The low air pressure warning signal will come on.
    The tractor protection valve control will pop out or go from "normal" to "emergency."
    30s
  • Q14
    Why should you not use the trailer hand brake to straighten out a jack-knifing trailer?
    The brake handle is too hard to manipulate.
    The brakes on the trailer wheels will not respond to the hand brake.
    The brakes on the trailer wheels will cause the trailer to skid.
    30s
  • Q15
    You should not use the trailer hand valve while driving because:
    It won't work as well as the foot brake.
    There's a risk of making the trailer skid.
    You should use the parking brake.
    30s

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