AL CDL AIR BRAKES PRACTICE TEST
11.
The supply pressure gauges tell you how much air pressure:
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is in the air brakes.
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is going to the brake chambers.
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you are applying to the brakes.
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is in the air tanks.
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12.
Why must air tanks be drained?
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The alcohol evaporator might stop working.
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There might not be enough antifreeze in the system.
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Your transmission fluid may drain out.
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The water can freeze in cold weather and cause brake failure.
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13.
The space under a heavily loaded vehicle can be very small. This can cause problems:
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on unpaved yards.
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when crossing railroad tracks.
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on dirt roads.
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All of the above.
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14.
The air compressor governor controls:
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when air tank pressure falls below the “cut-out” level.
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the speed of the air compressor.
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the air pressure applied to the brakes.
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when the air compressor will pump air into the air storage tanks.
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15.
ABS:
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improves your visibility at night.
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helps you stop faster.
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helps you avoid skids caused by over braking.
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may cause your wheels to lock when you break hard.
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