IN CDL AIR BRAKES PRACTICE TEST
6.
Some air brake systems have an alcohol evaporator to:
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reduce the danger of slipping.
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reduce the stopping power of the vehicle.
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prevent ice from forming in the brake system.
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force the brake shoes away from one another.
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7.
During a trip you should check:
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pressure gauges.
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temperature gauges.
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mirrors.
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All of the above.
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8.
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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1/4
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1/5
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9.
An alcohol evaporator:
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protects the air brake system from too much pressure.
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to hold compressed air.
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used to reduce the chance of the front wheels skidding.
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is used to reduce the risk of ice in air brake valves and other parts during cold weather.
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10.
To test the air leakage rate, with a fully-charged air system you should ____________ and time the air pressure drop.
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check the air compressor's drive belt, chock the wheels
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turn off the engine, release the parking brake
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put alcohol into the air system, run the engine at a fast idle
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release the parking brake, leave the engine running
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