RHODE ISLAND CDL AIR BRAKES PRACTICE TEST
6.
In a dual-air system - with engine at operating RPM, the pressure should build from 85 to 100 psi within how many seconds?
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12
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20
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45
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7.
Empty trucks:
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are higher than loaded trucks.
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require greater stopping distances.
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All of the above.
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8.
Air tanks must be drained completely to:
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pump water and compressor oil into the tanks.
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remove all the air.
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remove all moisture and oil.
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9.
If the drive wheels begin to spin when accelerating, you should:
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take your foot off the accelerator.
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continue to accelerate.
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brake gently.
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10.
To avoid becoming a distracted driver you should:
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not engage in complex conversations with others.
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adjust all vehicle controls and mirrors while driving.
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not turn off all communication devices.
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