AIR BRAKES CDL PRACTICE TEST - MISSISSIPPI
6.
In vehicles with air brakes, the air compressor governor:
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controls when the air storage tanks will pump air into the air compressor.
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controls when the air compressor will pump air into the air storage tanks.
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controls how much air the air compressor will pump into the air storage tanks.
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None of the above.
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7.
After starting the engine, oil pressure should rise to a normal level:
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within 6 minutes.
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within seconds.
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within 3 miles.
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within 2 minutes.
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8.
To prevent rollover, you should:
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keep the cargo as close to the ground as possible.
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put the lightest parts of the cargo under the heaviest parts.
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place the cargo near the rear of the trailer.
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place the cargo near the front of the trailer.
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9.
How do you test hydraulic brakes for leaks?
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Pull forward against parking brake to make sure the hydraulic brakes holds.
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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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None of the above.
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10.
A broken exhaust system:
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poses no threat to the driver.
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can let poisonous carbon monoxide to leak into the cab.
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does not cause problems.
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can improve fuel efficiency.
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