AIR BRAKES CDL PRACTICE TEST - NEW JERSEY
21.
The spring brakes come on:
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when main air pressure is lost.
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when you bring the vehicle to a complete stop right away.
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when air pressure in both air brake systems rises to a value set by the manufacturer.
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when you lose ABS control.
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22.
To use the controlled braking method in an emergency, you should:
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apply the brakes when the wheels lock up.
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pump the brake pedal 3 times.
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apply your brakes all the way, and release the brakes when the wheels lock up.
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apply the brakes as hard as you can without locking the wheels.
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23.
Air tank drains:
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are used to remove water and oil from the air tanks.
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protect the tanks and the rest of the system from too much pressure.
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should not be used in wet weather.
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are used to move air to the brakes.
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24.
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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1 inch
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1/4 inch
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1/2 inch
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2 inches
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25.
When driving on slippery roads, you should NOT:
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watch far enough ahead to keep a steady speed.
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use the engine brake.
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go slowly.
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try to anticipate stops early.
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