AIR BRAKES PRACTICE TEST - ILLINOIS
6.
When the low air pressure warning light and buzzer first come on, you should:
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bring the vehicle to a safe stop right away.
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immediately put alcohol into the air system.
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speed up to restore pressure.
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downshift and slow down.
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7.
Service brakes should:
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only be checked by a mechanic.
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always be checked before applying the brakes.
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be checked before each trip.
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All of the above.
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8.
In air brake vehicles, the parking brake should be used:
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when the spring brakes are on.
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any time you park (with a few exceptions).
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as little as possible.
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to hold your speed while going downhill.
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9.
The safety valve is usually set to open at:
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150 psi.
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75 psi.
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100 psi.
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200 psi.
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10.
If you are being tailgated, you should:
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flash your brake lights.
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increase your following distance.
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speed up.
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move to the left lane.
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