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Double-Triple Trailers Sample Test D

1. 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
C
D

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

3. Coupling and uncoupling methods are the same for more 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
C
D

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

5. Should you do a walk around inspection when preparing to pull Doubles or Triples?
A Yes
B No
C
D

6. To test the trailer service brakes you should:
A Lightly test brakes at 5 mph
B Apply hand control and check to see if you feel the trailer brakes come on
C Depress the brake pedal
D Release air to the brakes

7. When pulling triple trailers, which unit is more likely to roll over:
A The front trailer
B The middle trailer
C The last trailer
D The tractor

8. The stopping distance for a tractor trailer traveling 55 mph on dry pavement is:
A Longer than a football field, about 300 feet
B Two football fields, about 600 feet
C Two thirds of a football field, about 200 feet
D Half of a football field, about 150 feet

9. A drive-wheel skid when pulling doubles could result in a jackknife when:
A The tractor brakes lock up
B The trailer pushes the towed vehicle sideways
C The trailer slides off the right side of the road
D The tractor spins around

10. 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


Score =

Correct answers:






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