ARKANSAS CDL AIR BRAKES PRACTICE TEST
6.
A warning signal must come on before the air pressure in the tanks falls below:
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30 psi.
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120 psi.
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20 psi.
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60 psi.
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7.
When you release the brake pedal, the _____ rotates back and a spring pulls the brake shoes away from the drum.
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hydraulic brake system
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air compressor belt
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pressure gauge
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S-cam
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8.
Which of the following is NOT part of the drum brake?
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Safety valve
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Axle
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Brake drum
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Return spring
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9.
Do NOT use the parking brakes:
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to test that they work.
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when you park for less than two hours.
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if the brakes are very hot.
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when you leave your vehicle.
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10.
To test the low pressure warning signal, you should:
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check the air hoses connected to the brake chambers to make sure they aren't cut.
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manually let the air out of your brakes and see if the signal comes on.
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shut the engine off when you have enough air pressure, turn the electrical power on and step on and off the brake pedal until the low air pressure warning signal comes on.
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pump the brakes while your vehicle is running.
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