MO CDL AIR BRAKES PRACTICE TEST
6.
Vehicles with air brake systems take longer to come to a complete stop than vehicles with hydraulic brakes because of:
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reaction distance.
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brake lag.
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brake fading.
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7.
The safety relief valve is located:
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in the first tank the air compressor pumps air to.
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on each end of the vehicle's axles.
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in the front brake.
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8.
A tank endorsement is:
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required for both liquids and gases.
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only required when transporting gases.
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only required when transporting liquids.
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9.
Front-end header boards:
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protect drivers from spilled cargo.
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protect drivers from cargo in case of an accident or emergency stop.
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should never be used.
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10.
The air brake lag distance at 55 mph on dry pavement adds about:
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32 feet.
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60 feet.
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75 feet.
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