CT CDL AIR BRAKES PRACTICE TEST
16.
When coupling, you should:
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make sure the sliding fifth-wheel is locked.
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make sure the trailer wheels are not chocked.
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make sure the trailer kingpin is bent.
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be aware that wrong coupling and uncoupling can be very dangerous.
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17.
Service brakes should:
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only be checked by a mechanic.
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be checked before each trip.
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always be checked before applying the brakes.
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All of the above.
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18.
Which of the following is TRUE about dual air brake systems?
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Each brake system has its own air tanks, hoses and lines.
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most heavy-duty vehicles use dual air brake systems.
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A dual air brake system has 2 separate air brake systems.
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All of the above.
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19.
Distracted driving may be caused by _________ while driving.
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eating
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maintaining constant speed
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listening to music
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All of the above.
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20.
The __________ keeps air from going out if the air compressor develops a leak.
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one-way check valve
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emergency relay valve
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air compressor drive belt
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tractor protection valve
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