AIR BRAKES PRACTICE TEST - WYOMING
16.
To prevent drowsiness you should:
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get adequate sleep before a trip.
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schedule trips for the middle of the night.
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never drive with a passenger.
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avoid exercise to save more energy.
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17.
If your tires are hot, you should NOT:
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stop to let the tires cool down.
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once the tires have cooled down, make another stop to check the tires.
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let air out of the tires so the pressure goes back to normal.
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drive until you correct the cause of the overheating.
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18.
Front brake limiting valves were used to:
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reduce your speed so further braking or shifting is not required.
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reduce exhaust emissions.
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prevent overheating of the front tires.
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reduce the chance of the front wheels skidding on slippery surfaces.
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19.
How do you check that spring brakes come on automatically?
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Continue to step on and off the brake pedal until the air pressure falls to the manufacturer’s specification.
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On a tractor-trailer combination vehicle, continue to step on and off the brake pedal until the tractor protection valve and the parking brake valve close.
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On single vehicles, continue to step on and off the brake pedal until the parking brake valve pops out.
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All of the above.
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20.
You should NOT use the parking brakes if:
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the brakes are too dry.
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the brakes are very hot.
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the brakes are cold.
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All of the above.
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