SOUTH DAKOTA CDL AIR BRAKES PRACTICE TEST
6.
You should NOT use the parking brakes if:
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the brakes are very hot.
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the brakes are cold.
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the brakes are too dry.
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All of the above.
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7.
When should you downshift automatic transmissions?
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When you want to go faster.
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Watch your tachometer, and downshift when your engine reaches the top of the range.
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When going down steep grades.
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When you start to get drowsy.
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8.
When the air pressure is built up to governor cutoff, the air leakage rate for combination vehicles with the engine off and the foot brake fully applied should be less than_____ in one minute.
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5 psi
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2 psi
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4 psi
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3 psi
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9.
If you're feeling tired while driving you should:
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drink coffee.
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eat something.
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increase your speed to get to your destination quicker.
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stop driving and get some rest.
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10.
Antifreeze:
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helps the engine under hot conditions as well as cold conditions.
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helps the engine only when the temperature is below freezing.
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helps the engine only under hot conditions.
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doesn't help the engine in any way.
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