VA CDL AIR BRAKES PRACTICE TEST
11.
When the spring brakes are on, you should push the brake pedal down:
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Only when driving downhill.
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Only when driving uphill.
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Never.
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12.
If you are driving a 30-foot vehicle at 55 mph, you should leave at least _____ between you and the vehicle ahead.
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2 seconds
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3 seconds
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4 seconds
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13.
Air tank drains:
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are used to remove water and oil from the air tanks.
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protect the tanks and the rest of the system from too much pressure.
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should not be used in wet weather.
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14.
The alcohol evaporator:
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ensures the coolant temperature gauge remains in the normal range.
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helps to reduce the risk of ice in air brake valves and other parts in cold weather.
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eliminates the need for daily air tank drainage.
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15.
In vehicles with air brakes, water and compressor oil in the bottom of the air tank:
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should be added regularly.
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should not be removed.
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should be drained completely.
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