AIR BRAKES PRACTICE TEST - VERMONT
11.
When you pull hard on a slack adjuster and it moves more than about _____ where the push rod attaches to it, the slack adjuster probably needs adjustment.
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2 inches
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1 inch
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1/2 inch
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12.
Which of the following is NOT a way to determine if your trailer is equipped with ABS (antilock braking system)?
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It was built after March 1, 1998.
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The letters "ABS" are printed on the side of the steering wheel.
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It has yellow ABS malfunction lamps.
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13.
The best way to recognize that your trailer has started to skid is:
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by recognizing tire failure.
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by seeing it in your mirrors.
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by feeling the brakes come on.
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14.
Why must air tanks be drained?
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To keep from fouling the air compressor oil.
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Water and
oil reduce the air pressure.
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Water can freeze in cold weather and cause brake failure.
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15.
Spring brakes:
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apply when air pressure leaves the brake chamber and release when air pressure builds up in the chamber.
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are air applied like service brakes.
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are not designed to work in an emergency when your service brakes fail.
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