CA CDL AIR BRAKES PRACTICE TEST
21.
During a trip you should check:
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pressure gauges.
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temperature gauges.
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All of the above.
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22.
When should you downshift automatic transmissions?
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When you start to get drowsy.
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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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23.
The parking brake:
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should be used whenever you park.
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should be used when driving in bad weather.
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should be used when you need to apply the brakes firmly.
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24.
In vehicles with air brakes, water and compressor oil in the bottom of the air tank:
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should be drained completely.
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should be added regularly.
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should not be removed.
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25.
Emergency brakes must be held on by:
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air pressure.
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hydraulic pressure.
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mechanical force.
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