AIR BRAKES PRACTICE TEST - ALABAMA
16.
The one-way check valve:
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keeps the axles in place.
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keeps your wheels from locking up when you brake hard.
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keeps air from going out if the air compressor develops a leak.
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supplies air to the trailer air tanks.
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17.
If the low air pressure warning light comes on, you should:
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call for help.
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continue to drive normally.
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set the parking brake.
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stop immediately.
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18.
If your brakes fail while you are driving on a downgrade, you should:
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take the least hazardous escape route you can.
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use an escape ramp if it's available.
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immediately start looking outside your vehicle for something to stop it.
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All of the above.
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19.
Which of the following is NOT part of the drum brake?
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Safety valve
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Axle
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Brake drum
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Return spring
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20.
Which of the following is TRUE about dual air brake systems?
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A dual air brake system has 2 separate 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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