AIR BRAKES CDL PRACTICE TEST - VERMONT
11.
The safety relief valve is located:
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in the first tank the air compressor pumps air to.
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in the front brake.
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on each end of the vehicle's axles.
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12.
How should you apply the brakes when going down a steep downgrade?
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Apply the brakes when you reach the bottom of the downgrade.
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Apply the brakes as hard as you can without locking the wheels.
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Apply the brakes whenever you reach your safe speed, until your speed has been reduced to 5 mph below your safe speed.
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13.
If you must drive through a deep puddle you should:
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speed up to get through the puddle as quickly as possible.
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slow down and place transmission in a low gear.
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apply the brakes until your speed reaches 40 mph.
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14.
Which of the following is a reason why air tanks must be drained?
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Your brakes may fail due to the water freezing.
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Your battery fluid may drain out.
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The governor may stop the compressor from pumping air.
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15.
If you are driving a 30-foot vehicle at 55 mph, you should leave at least _____ between you and the vehicle ahead.
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4 seconds
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3 seconds
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2 seconds
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