TENNESSEE CDL AIR BRAKES PRACTICE TEST
6.
To check the slack adjusters on S-cam brakes, you should:
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park on level ground and fan off the air pressure by rapidly applying and releasing the foot brake.
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park on level ground, chock the wheels and release the parking brakes, then use gloves and pull hard on each slack adjuster that you can reach.
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release the parking brake valve and begin reducing the air pressure by stepping on and off the brake pedal.
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All of the above.
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7.
Air tank drains:
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are used to move air to the brakes.
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protect the tanks and the rest of the system from too much pressure.
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are used to remove water and oil from the air tanks.
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should not be used in wet weather.
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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.
Air storage tanks:
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use parts of the service brake systems to stop the vehicle in a brake system failure.
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hold compressed air for the brakes.
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are installed in the first tank the air compressor pumps air to.
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pump air into the air storage tanks.
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10.
If the safety relief valve in the air brake system releases air:
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this will supply more power to the brakes.
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the valve is fully operational.
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this will supply more power to the drive wheels.
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something is wrong.
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