AIR BRAKES PRACTICE TEST - WISCONSIN
21.
When backing a trailer, turn the wheel right to make the cab go ________ and the trailer go ________.
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left; left
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left; right
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right; right
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right; left
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22.
If you get stuck on railroad tracks, you should:
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check the engine compartment quickly.
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have a helper push your vehicle.
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get out of the vehicle and away from the tracks.
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stay in the vehicle and call for help.
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23.
If you are driving a 30-foot vehicle at 55 mph, you should leave at least _____ between you and the vehicle ahead.
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2 seconds
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5 seconds
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3 seconds
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4 seconds
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24.
Brake drums or discs must not have cracks longer than ____ the width of the friction area.
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1/2
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1/3
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1/5
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1/4
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25.
Slack adjusters:
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regulate the distance that the air brake has to travel to apply friction to the wheel.
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are the linkage between the operating rod in the brake chamber and drum brakes or disk brakes in an air brake system.
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are used to adjust the brakes on an air-brake system.
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All of the above.
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