AIR BRAKES CDL PRACTICE TEST - WYOMING
6.
What factors can cause brakes to fade or fail?
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Overheating, low air pressure or water in the air tanks.
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Going too slow.
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Not taking your foot off the accelerator.
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Not pressing the brake pedal hard enough.
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7.
Rough acceleration:
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improves gas mileage.
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can cause mechanical damage.
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is necessary to warm up the engine.
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is recommended during long trips.
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8.
In a vehicle with a dual air brake system:
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one system supplies air to the trailer.
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each system has its own air tanks.
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both systems typically operate the regular brakes on the rear axle.
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All of the above.
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9.
Empty trucks require _____ stopping distances because empty vehicles have ______ traction.
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less; less
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less; more
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greater; more
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greater; less
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10.
Which of the following is NOT a reason for hydraulic brake failure?
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Brake fade on long hills
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Loss of hydraulic pressure
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Stab braking
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All of the above.
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