Combination Vehicles 1
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When backing a tractor under a trailer, you should
2 / 19
A trailer is most likely to jackknife when it is
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You should not use the trailer hand valve while driving because
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You should not use the trailer hand brake to straighten out a jackknifing trailer, because
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If your test of the tractor protection valve is successful,
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If your vehicle gets stuck on a railroad track, you should
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As part of your vehicle inspection test, if your vehicle is equipped with air brakes and has a trailer, you will inspect the air connections between the truck or tractor and the trailer. Make sure that the ________ are locked in place and free of damage or air leaks.
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During uncoupling, you should disconnect the electrical cable and
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Before you start to uncouple, you must
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When backing your tractor under a trailer, you should expect:
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The fifth wheel locking lever is not locked after the jaws close around the kingpin; this means:
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You are coupling a semi-trailer to your tractor but have not yet backed under. The trailer is at the right height when:
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There are two things that a driver can do to prevent a roll over. They are: (1) keep the cargo as close to the ground as possible; and (2):
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You supply air to the trailer tanks by:
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Your emergency air line breaks or gets pulled apart while you are driving. The loss of pressure will cause the:
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Which answer is correct for the air valves when testing the trailer spring / parking brakes only?
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How should you test the tractor trailer connection for security?
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Which answer is correct for the air valves when testing the trailer service brakes only?
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When should you use the hand valve to park a combination vehicle?
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