AZ CDL AIR BRAKES PRACTICE TEST
6.
If you must drive slowly, how should you alert following drivers?
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Turn on your taillights
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Use your emergency flashers if it is legal
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Flash your brake lights
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7.
The spring brakes come on:
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when air pressure in both air brake systems rises to a value set by the manufacturer.
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when main air pressure is lost.
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when you bring the vehicle to a complete stop right away.
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8.
To test the low pressure warning signal, you should:
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pump the brakes while your vehicle is running.
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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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check the air hoses connected to the brake chambers to make sure they aren't cut.
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9.
The low pressure warning signal will generally activate when the air pressure falls between:
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80–85 psi.
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55–75 psi.
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85–100 psi.
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10.
To perform an applied leakage test, the vehicle’s air pressure should be built up to maximum pressure. Check the air gauge to see that the air pressure should drop no more than:
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1 psi for single vehicles and 3 psi for a combination of 2 vehicles.
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3 psi for single vehicles and 4 psi for a combination of 2 vehicles.
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2 psi for single vehicles and 5 psi for a combination of 2 vehicles.
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