NEW HAMPSHIRE CDL AIR BRAKES PRACTICE TEST
21.
Before starting down a hill, you should slow down and shift down:
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to a speed that you can control without using the brakes hard.
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so you can coast downhill.
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to a gear that will cause your brakes to overheat.
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to a gear that will cause your engine to exceed its redline.
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22.
The safety valve is usually set to open at:
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150 psi.
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100 psi.
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200 psi.
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75 psi.
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23.
The air compressor is connected to:
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the suspension system.
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the radiator.
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the engine.
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the transmission.
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24.
Slack adjusters:
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are the linkage between the operating rod in the brake chamber and drum brakes or disk brakes in an air brake system.
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are used to adjust the brakes on an air-brake system.
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regulate the distance that the air brake has to travel to apply friction to the wheel.
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All of the above.
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25.
When driving on slippery roads, you should NOT:
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try to anticipate stops early.
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watch far enough ahead to keep a steady speed.
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go slowly.
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use the engine brake.
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