AIR BRAKES PRACTICE TEST - ALASKA
6.
Which of the following is TRUE about dual air brake systems?
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Each brake system has its own air tanks, hoses and lines.
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most heavy-duty vehicles use dual air brake systems.
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All of the above.
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7.
How do you test hydraulic brakes for leaks?
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Pump the brake pedal three times, then apply firm pressure to the pedal and hold for five seconds. The pedal should not move.
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Pump the brake pedal ten times and see if it holds.
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Pull forward against parking brake to make sure the hydraulic brakes holds.
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8.
The space under a heavily loaded vehicle can be very small. This can cause problems:
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when crossing railroad tracks.
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on dirt roads.
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All of the above.
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9.
Passive railroad crossings:
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should never be crossed using a CMV.
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do not have traffic control devices.
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have at least one traffic control device.
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10.
The supply pressure gauges tell you how much air pressure:
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is going to the brake chambers.
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is in the air tanks.
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you are applying to the brakes.
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