AIR BRAKES PRACTICE TEST - NEBRASKA
21.
Combination vehicles have __ air lines.
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4
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1
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2
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3
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22.
The wig wag is:
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a noise reduction mechanism.
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when your tires might grab unexpectedly and you lose control of your vehicle.
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a type of rollover.
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a low air pressure warning system.
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23.
To test the air leakage rate, with a fully-charged air system you should ____________ and time the air pressure drop.
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turn off the engine, release the parking brake
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release the parking brake, leave the engine running
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put alcohol into the air system, run the engine at a fast idle
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check the air compressor's drive belt, chock the wheels
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24.
If are being followed closely, you should:
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increase your following distance.
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change lanes quickly.
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decrease your following distance.
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flash your brake lights.
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25.
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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