Combination Vehicles Sample Test E
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Combination Vehicles Sample Test E

1. Before you back under the trailer, you should be sure that the trailer brakes are?
A Disengaged (Unapplied).
B Locked (Applied).
C Unhooked.

2. When a tractor and a trailer are coupled, how much space should there be between the upper and lower fifth wheel.
A No space.
B Space enough to allow air to flow freely.
C Seven eight's inch.

3. After you lock the kingpin into the fifth wheel how can you check the connection?
A By tapping it with a rubber hammer.
B By pulling the tractor ahead gently with the trailer brakes locked.
C By pulling it by hand.

4. Looking into the back of the fifth wheel, which part of the kingpin should the locking jaws close around?
A The skid plate.
B The pickup ramp.
C The shank of the kingpin.

5. For the coupling to be complete for a fifth wheel with a locking lever, where must the safety catch for the fifth wheel locking lever be?
A Over the locking lever.
B Level with the locking lever.
C Under the locking lever.

6. After you have coupled the tractor with a trailer where should the landing gear be before driving away?
A Raised at least six inches above the ground.
B Raised at least one foot above the ground with the crank handle secured in its bracket.
C Fully raised with the crank handle secured in its bracket.

7. Inspect the coupling. You must make certain that there is enough clearance between which two of the following?
A Between the fifth wheel and the floor of the trailer.
B Between the tractor taillights and the landing gear.
C Between the tops of the tractor tires and the nose of the trailer.

8. If you will be pulling doubles where one trailer is more heavily loaded than the other, where should the heavier loaded trailer be placed?
A It should always be behind the lighter trailer.
B It should always be in front of the lighter trailer
C It should be placed where it will have the least wind resistance.

9. What should the trailer height be before you connect a converter dolly to a second or third trailer?
A Five feet eight inches.
B It must be slightly lower than the center of the fifth wheel.
C Four feet eight inches.

10. Why should you never unlock the pintle hook with the dolly still under the rear trailer?
A The dolly tow bar may fly up.
B There may not be enough grease on the pintle hook to enable it to ride smoothly.
C It may be too hard to unlock it next time.


Score =
Correct answers:






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