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9 Cards in this Set
- Front
- Back
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There are two things that can prevent a rollover, they are 1) keep the cargo as close to the ground as possible, and 2)
A. make sure the brakes are properly adjusted B. Keep both hands firmly on the steering wheel C. Go slow around turns |
You have pushed in the trailer supply valve. You should not move the tractor until the whole air system is:
A. Empty B. At normal pressure C. Between 60 and 80 psi |
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The best way to tell if your trailer has started to skid is to:
A. Hear the wheels skidding B. See it in your mirrors C. Feel for "pulling" in the cab |
Which of these vehicles off-track the most?
A. 5 axle tractor towing a 52 foot trailer B. 5 axle tractor towing a 45 foot trailer C. 5 axle tractor towing a 42 foot trailer |
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A tractor with a(n) ___________ trailer requires the shortest stopping distance
A. empty B. light loaded C. fully loaded |
A trailer is most likely to jackknife when it is:
A. Loaded to full capacity B. Over loaded C. Empty |
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Under good driving conditions, you should leave at least one second of space between your vehicle and the vehicle ahead for every ______ feet of your vehicles length
A. 10 B. 20 C. 30 |
If you have coupled with a semitrailer, where should the front trailer supports be before driving away?
A. Raised 1/2 way with the crank handle secured in its bracket B. Raised 3/4 way with the crank handle removed C. Fully raised with the crank handle secured in its own bracket |
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The fifth wheel locking lever is not locked after the jaws close around the kingpin. This means that:
A. The trailer will not swivel on the fifth wheel B. The parking lot is off and may drive away C. The coupling is not right and should be fixed before driving the coupled unit |
You should not back a tractor under a trailer until the whole air system is:
A. empty B. at normal pressure C. Between 60 and 80 psi |
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You are coupling a semitrailer to your tractor but have not backed under it. The trailer is at the right height when:
A. The kingpin is about 1 1/4 inches above the fifth wheel B. The end of the kingpin is even with the top of the fifth wheel C. It is raised slightly when the tractor is backed under it |
Glad hands are used to connect the:
A. Electric lines from the truck to the trailer B. Kingpin from the tractor to the locking jaws on the glide plate C. Service and emergency air lines from the truck to the trailer |
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You want to inspect the trailer supports. You should place the tractor transmission in which gear after you have uncoupled the trailer?
A. Low reverse B. Neutral C. High reverse |
How much space should be between the upper and lower fifth wheel after coupling?
A. About 1/4 inch B. Just enough to see light through it C. None |
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Which part of the kingpin should the locking jaws close around?
A. The shank B. The head C. The base |
The front trailer supports are up and the trailer is resting on the tractor. Make sure:
A. there is enough clearance between the upper and lower fifth wheel B. the safety latch is in the unlocked position C. There is enough clearance between the tractor frame and the landing gear |
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When checking the trailers emergency brakes, the tractor protection control valve should be placed in the _______ position.
A. normal B. emergency C. neutral |
Compared to a straight truck or bus, there are ________ things to inspect on a combination vehicle.
A. fewer B. the same amount C. more |
