WI CDL AIR BRAKES PRACTICE TEST
6.
In vehicles with air brakes, the brake pedal:
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let the
air out of the spring brakes.
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controls the air pressure applied to the brakes.
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tells you how much pressure is in
the air tanks.
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pumps air into the air storage
tanks.
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7.
Empty trucks have the best braking. True or False?
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It depends on the cargo.
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False.
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It depends on the truck.
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True.
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8.
Emergency brakes must be held on by:
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dynamic pressure.
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hydraulic pressure.
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air pressure.
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mechanical force.
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9.
Front wheel braking is good:
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only in good weather.
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Never.
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under all conditions.
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only in wet conditions.
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10.
When driving in very hot weather, the heat will increase the chances of:
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loss of hydraulic pressure.
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tire failure.
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ABS malfunction.
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suspension system defects.
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