AIR BRAKES CDL PRACTICE TEST - SOUTH CAROLINA
6.
The application pressure gauge:
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protects the tank and the rest of the system from too much pressure.
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shows how much air pressure is being applied to the brakes.
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tells you how much pressure is in the air tanks.
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stops the compressor from pumping air.
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7.
Supply pressure gauges tell you:
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when the pressure in the system drops below 60 psi.
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how much pressure is in the air tanks.
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when the air pressure in the tanks falls below 60 psi.
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how much air pressure you are applying to the brakes.
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8.
Hydroplaning is more likely if:
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tire tread is worn.
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the road is wet.
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tire pressure is low.
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All of the above.
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9.
Before starting down a hill, you should:
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release the accelerator and shift to Neutral at the same time.
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look for an escape route.
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apply the brakes hard.
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slow down and shift to a lower gear.
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10.
Vehicles with ABS have ______ ABS malfunction lamps on the instrument panel.
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yellow
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blue
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green
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orange
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