CDL DOUBLES & TRIPLES

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Author:
Anonymous
ID:
190851
Filename:
CDL DOUBLES & TRIPLES
Updated:
2012-12-30 16:56:02
Tags:
CDL
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Description:
CDL DOUBLES ENDORSEMENT
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  1. Is it important to be careful when driving doubles and triples?

    A. Yes
    B. No
    A. Yes
  2. Special care should be taken when pulling two or three trailers because more things can go wrong and are less stable than other commercial vehicles.

    A. True
    B. False
    A. True
  3. Doubles and triples are not as likely to turn over as are other combination vehicles.

    A. True
    B. False
    A. True
  4. Is it alright not to check all the critical parts when doing a pretrip inspection on doubles or triples?

    A. Yes
    B. No
    B. No
  5. When driving doubles or triples how whould they be driven to avoid rollover or jackknifing?

    A. Fast
    B. Slowly
    C. Smoothly
    C. Smoothly
    (this multiple choice question has been scrambled)
  6. Do doubles and triples need more space on the highway than other commercial vehicles?

    A. Yes
    B. No
    A. Yes
  7. For the safest handling on the road when pulling doubles and triples how should the load be positioned?

    A. The lighter load in first position, the heavier in the rear.
    B. It does not matter which trailer is heavier.
    C. The heavier load in first position, the lighter in the rear.
    C. The heavier load in first position, the lighter in the rear.
    (this multiple choice question has been scrambled)
  8. What is a converter dolly used for?

    A. To couple tow or three trailers behind a tractor truck.
    B. To couple a trailer to a tractor.
    C. To help move cargo in a semi-trailer.
    A. To couple tow or three trailers behind a tractor truck.
    (this multiple choice question has been scrambled)
  9. Do all converter dollies have spring brakes?

    A. Yes
    B. No
    B. No
  10. What three methods can you use to secure a second trailer before coupling?

    A. Release dolly brake by opening the air tank petcock or if the dolly has spring brake, use the dolly parking brake control.
    B. Wheel the dolly into position by hand so it is in line with the kingpin.
    C. Use the tractor and first semi trailer to pick up the converter dolly and move it into position.
    D. All of the above.
    E. None of the above.
    D. All of the above.
  11. The dolly tow bar may fly up if you unlock the pintle hook with the converter dolly still under the rear trailer.

    A. True
    B. False
    A. True
  12. You should use different methods for uncoupling second and third trailers.

    A. True
    B. False
    B. False
  13. Coupling and uncoupling methods are the same for most common tractor-trailer combinations, but there are other ways of coupling and uncoupling the many types of truck-trailer combinations that are in use.

    A. True
    B. False
    A. True
  14. There are more things to inspect on a combination vehicle than on a single vehicle.

    A. True
    B. False
    A. True
  15. A safe speed on a curve for a straight truck or a single trailer combination vehicle is always the same as for a set of doubles or triples.

    A. True
    B. False
    B. False
  16. When pulling triple trailers, always put the heaviest trailer:

    A. In the front
    B. It doesn't make a difference
    C. In the rear
    D. In the middle
    A. In the front
    (this multiple choice question has been scrambled)
  17. When coupling twin trailers, you should release the dolly brakes by:

    A. Dropping the trailer onto the fifth wheel
    B. Opening the air tank petcock
    C. Letting the air out of the brake line
    D. Pushing the air release valve on the dash
    B. Opening the air tank petcock
    (this multiple choice question has been scrambled)
  18. When connecting the converter dolly to the rear trailer, you should remember to:

    A. Make sure trailer brakes are locked
    B. Make sure trailer height is correct
    C. Raise the landing gear slightly off the ground
    D. All of the above
    D. All of the above
  19. When coupling the rear trailer, the correct trailer height is:

    A. Slightly lower than the fifth wheel
    B. When the locking jaws are closed around the kingpin
    C. The kingpin touches the fifth wheel
    D. Six inches of space between the upper and lower fifth wheel
    B. When the locking jaws are closed around the kingpin
    (this multiple choice question has been scrambled)
  20. To uncouple double trailers, you should park your rig:

    A. On level ground
    B. On a soft surface
    C. In the company parking lot
    D. On a slight incline
    A. On level ground
    (this multiple choice question has been scrambled)
  21. To uncouple the converter dolly you should:

    A. Chock the wheels, disconnect safety chains and lower the landing gears
    B. Chock the wheels, lower the landing gear and disconnect safety chains
    C. Disconnect safety chains, lower the landing gear and chock the wheels
    D. Lower the landing gear, disconnect safety chains, and chock the wheels
    D. Lower the landing gear, disconnect safety chains, and chock the wheels
    (this multiple choice question has been scrambled)
  22. It is dangerous to unlock the pintle hook with the dolly still under the rear trailer because:

    A. The brakes might release
    B. The dolly tow bar may fly up
    C. The kingpin might break off
    D. The fifth wheel might not be aligned
    B. The dolly tow bar may fly up
    (this multiple choice question has been scrambled)
  23. When inspecting doubles, the shut off valves at the rear of the trailer should be:

    A. Open at the rear of front trailer, open at the rear of the last trailer
    B. Closed at the rear of front trailer, closed at the rear of the last trailer
    C. Open at the rear of front trailer, closed at the rear of the last trailer
    D. None of the Above
    C. Open at the rear of front trailer, closed at the rear of the last trailer
    (this multiple choice question has been scrambled)
  24. To check for air flow to the last trailer:

    A. Test emergency brake lines on level surface
    B. Open emergency shut off valve and listen for escaping air
    C. Pull forward and step on brake pedal
    D. Step on brake pedal and watch for brake lights
    B. Open emergency shut off valve and listen for escaping air
    (this multiple choice question has been scrambled)
  25. You should test your tractor protection valve to avoid:

    A. The emergency brakes coming on due to loss of air
    B. The loss of air from the air hose
    C. The loss of air from your trailer brakes
    D. All of the above
    D. All of the above
  26. To test the trailer service brakes you should:

    A. Release air to the brakes
    B. Depress the brake pedal
    C. Apply hand control and check to see if you feel the trailer brakes come on
    D. Lightly test brakes at 5 mph
    C. Apply hand control and check to see if you feel the trailer brakes come on
    (this multiple choice question has been scrambled)
  27. When pulling triple trailers, which unit is more likely to roll over:

    A. The front trailer
    B. The last trailer
    C. The tractor
    D. The middle trailer
    B. The last trailer
    (this multiple choice question has been scrambled)
  28. The stopping distance for a tractor trailer traveling 55 mph on dry pavement is:

    A. Two thirds of a football field, about 200 feet
    B. Two football fields, about 600 feet
    C. Longer than a football field, about 300 feet
    D. Half of a football field, about 150 feet
    C. Longer than a football field, about 300 feet
    (this multiple choice question has been scrambled)
  29. A drive-wheel skid when pulling doubles could result in a jackknife when:

    A. The tractor spins around
    B. The tractor brakes lock up
    C. The trailer pushes the towed vehicle sideways
    D. The trailer slides off the right side of the road
    C. The trailer pushes the towed vehicle sideways
    (this multiple choice question has been scrambled)
  30. When steering to avoid a crash while pulling doubles, remember to:

    A. Keep both hands on the steering wheel
    B. Stay off the brake while turning
    C. Be prepared to counter-steer
    D. All of the above
    D. All of the above

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