AIR BRAKES CDL PRACTICE TEST - HAWAII
16.
When you release the brake pedal, the _____ rotates back and a spring pulls the brake shoes away from the drum.
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air compressor belt
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pressure gauge
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S-cam
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17.
Spring brakes:
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will apply the brakes when a leak in the air brake system causes all the air to be lost.
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are usually held back by air pressure.
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All of the above.
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18.
If the air tanks are not drained:
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the water can freeze in cold
weather and cause brake failure.
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your speed must be reduced to 5 MPH below your “safe” speed.
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the air pressure in the tanks is reduced.
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19.
Which of the following is a reason why air tanks must be drained?
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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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Your brakes may fail due to the water freezing.
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20.
The service brake applies and releases:
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the parking brake when you use the parking brake control.
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the brake when you use the brake pedal during normal driving.
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the brake in an emergency situation.
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