AIR BRAKES PRACTICE TEST - DISTRICT OF COLUMBIA
6.
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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the air pressure in the tanks is reduced.
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your speed must be reduced to 5 MPH below your “safe” speed.
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the spring brakes will come on.
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7.
Pressing and releasing the brake pedal unnecessarily can:
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causes all the air to be lost.
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apply more air pressure.
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let air out faster than the compressor can replace it.
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causes friction, which slows the vehicle.
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8.
If air doesn't flow all the way to the back:
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your lower fifth wheel may fall off.
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a rollover is more likely.
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your brakes will not work properly.
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the trailer will tend to swing around.
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9.
The low pressure warning signal will generally activate when the air pressure falls between:
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30–35 psi.
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85–100 psi.
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55–75 psi.
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80–85 psi.
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10.
If an aggressive driver is involved in an accident down the road, you should:
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confront the aggressive driver.
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stop a safe distance from the accident scene, wait for the police and report the behavior you witnessed.
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try to get their vehicle to the side of the road.
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make eye contact with the driver.
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