UTAH CDL AIR BRAKES PRACTICE TEST
6.
Controlled braking:
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involves locking the wheels and then releasing the brakes.
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involves pumping the brakes while keeping steering wheel movements very small.
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can be used to keep your vehicle in a straight line and allow you to turn if necessary.
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must be used when you need to turn sharply while braking.
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7.
What is an important thing to remember about emergency braking?
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You should never use stab braking.
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Pushing down on the brake pedal as hard as you can will only keep the wheels locked up and cause a skid.
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The more heavily loaded semitrailer trailer should be in the rear.
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Your natural response (hitting the brakes) is never the right solution.
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8.
If your brakes fail while you are driving on a downgrade, you should:
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immediately start looking outside your vehicle for something to stop it.
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take the least hazardous escape route you can.
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use an escape ramp if it's available.
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All of the above.
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9.
Some air brake systems have an alcohol evaporator. Checking the alcohol container and filling it up as necessary:
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helps keep the engine cool, as well as lubricating it.
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helps you avoid wheel lock up.
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reduces the risk of having an accident due to drowsy driving.
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reduces the risk of ice in air brake valves during cold weather.
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10.
The stop light switch:
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should be used to fend off tailgaters.
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tells you when you need to use your parking brake instead of the service brake.
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turns on the brake lights when you put on the air brakes.
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warns you when the air supply pressure drops below 55 psi.
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