HAWAII CDL AIR BRAKES PRACTICE TEST
11.
Empty trucks require _____ stopping distances because empty vehicles have ______ traction.
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less; more
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greater; more
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greater; less
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12.
The low pressure warning signal will generally activate when the air pressure falls between:
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55–75 psi.
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80–85 psi.
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85–100 psi.
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13.
When parking a trailer without spring brakes, it is very important for safety that you use wheel chocks. Why?
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The air could leak out of the trailer air tank, releasing its emergency brakes.
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You may not notice a major leak in the service line until you try to put the brakes on.
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if you don't use wheel chocks, supply air will be sent to the service line instead of going to charge the trailer air tanks.
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14.
ABS:
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helps you avoid wheel lock up.
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makes it easier to break.
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allows the wheels to lock up.
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15.
Air pressure should build up in a single air system, within about:
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3 minutes.
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15 minutes.
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10 minutes.
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