IOWA CDL AIR BRAKES PRACTICE TEST
6.
At passive railroad crossings, even if there are active railroad signals that indicate the tracks are clear, you must _________ to be sure it is safe to proceed.
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stop, look, and listen
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listen, look and stop
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go, stop and listen
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7.
With air brake vehicles, you should use the parking brakes:
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as little as possible.
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whenever you leave the vehicle unattended.
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only during the vehicle inspection test.
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8.
Typically an air system is fully-charged at:
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75 psi
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25 psi
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125 psi
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9.
Slack adjusters:
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regulate the distance that the air brake has to travel to apply friction to the wheel.
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regulate the distance between the rear wheels.
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should move more than one inch where the push rods attach to them.
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10.
An alcohol evaporator is important during:
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hot weather.
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cold weather.
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dry weather.
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