CDL AIR BRAKES PRACTICE TEST - HAWAII
6.
If your vehicle is equipped with air brakes, loss of air pressure in the
emergency line causes:
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the trailer emergency brakes to come on.
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the speed of your vehicle to increase.
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the trailer spring brakes to come on.
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7.
When should you downshift automatic transmissions?
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Watch your tachometer, and downshift when your engine reaches the top of the range.
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When you start to get drowsy.
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When going down steep grades.
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8.
If your truck has automatic transmission, you should downshift:
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whenever road conditions allow.
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after entering a curve.
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when going down grades.
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9.
If the low air pressure warning light comes on, you should:
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continue to drive normally.
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stop immediately.
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call for help.
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10.
Which of the following statements is true?
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Poor cargo ventilation is a common cause of fire.
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Carrying a properly charged and rated fire extinguisher will help prevent fires.
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There is no way that short circuits due to damaged insulation can cause a vehicle fire.
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