OH CDL AIR BRAKES PRACTICE TEST
21.
In vehicles with air brakes, water and compressor oil in the bottom of the air tank:
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should be added regularly.
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should be drained completely.
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should not be removed.
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22.
Older trailers do not have spring brakes. If the air supply leaks away:
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there will be no emergency brakes.
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the trailer will stop normally.
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the ABS won't work properly.
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23.
Front wheel braking is good:
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Never.
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only in wet conditions.
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under all conditions.
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24.
If the low pressure warning signal doesn't work:
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this could cause sudden emergency braking in a single-circuit air system.
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you could lose air pressure and you would know it.
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None of the above.
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25.
If the air compressor is belt-driven, you should check the air compressor drive belt before each trip. The belt should be:
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loose.
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tight.
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cracked.
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