AIR BRAKES PRACTICE TEST - MINNESOTA
6.
You supply air to the trailer brake system by:
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pushing in the trailer air supply knob.
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connecting the tractor service air line to the trailer service glad hand.
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pulling out the trailer air supply valve.
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plugging the electrical cord into the trailer.
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7.
With the air pressure built up to governor cutoff, the maximum leakage rates per minute after the initial pressure drop are:
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1 psi for single vehicles and 2 psi for a combination of 2 vehicles.
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4 psi for single vehicles and 2 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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5 psi for single vehicles and 6 psi for a combination of 2 vehicles.
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8.
Empty trucks have the best braking. True or False?
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It depends on the truck.
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False.
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It depends on the cargo.
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True.
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9.
To apply the parking brakes:
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push the parking brake control knob in.
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place the parking brake control knob in Neutral.
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push the brake pedal three times.
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pull the parking brake control knob out.
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10.
If the low pressure warning signal doesn't work:
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in dual systems the stopping distance will be decreased.
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you could lose air pressure and you would know it.
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this could cause sudden emergency braking in a single-circuit air system.
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None of the above.
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