OR CDL AIR BRAKES PRACTICE TEST
6.
Your truck has a dual air system. If either system is very low on pressure:
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either the front or the rear brake will not be fully operational.
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the ABS will not work properly.
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the tractor protection valve will not work properly.
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the low pressure warning signal will stop working.
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7.
If you are feeling sleepy, you should:
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get some coffee.
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slow down.
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drive faster.
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pull off the road and rest.
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8.
Most heavy duty vehicles use ___ air brake systems for safety.
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reduced
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single
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dual
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triple
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9.
Which of the following is NOT part of the air brake system?
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Anti-lock brake system
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Service brake system
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Parking brake system
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Emergency brake system
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10.
When you make a quick lane change, the crack-the-whip effect can turn the trailer over. The crack-the-whip effect is caused by:
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the rear trailer of a triple.
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strong wind.
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worn tire tread.
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rearward amplification.
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