VIRGINIA CDL AIR BRAKES PRACTICE TEST
16.
If are being followed closely, you should:
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decrease your following distance.
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change lanes quickly.
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increase your following distance.
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17.
A dual air brake system:
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has a single air brake system, which uses a single set of brake controls.
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has two separate air brake systems, which use two separate sets of brake controls.
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has two separate air brake systems, which use a single set of brake controls.
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18.
If you must drive through a deep puddle you should:
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apply the brakes until your speed reaches 40 mph.
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slow down and place transmission in a low gear.
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speed up to get through the puddle as quickly as possible.
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19.
The one-way check valve:
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supplies air to the trailer air tanks.
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keeps your wheels from locking up when you brake hard.
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keeps air from going out if the air compressor develops a leak.
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20.
An alcohol evaporator is important during:
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cold weather.
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dry weather.
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hot weather.
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