AIR BRAKES PRACTICE TEST - WEST VIRGINIA
16.
Emergency brakes and parking brakes must be held on by:
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hydraulic pressure.
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mechanical force.
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air pressure.
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All of the above.
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17.
Antifreeze:
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helps the engine under hot conditions as well as cold conditions.
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helps the engine only when the temperature is below freezing.
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doesn't help the engine in any way.
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helps the engine only under hot conditions.
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18.
ABS helps you:
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increase your normal braking capability.
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steer gently and smoothly while you are braking.
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stop much faster.
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avoid wheel lock up and maintain control of your vehicle when you brake.
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19.
In a dual-air system - with engine at operating RPM, the pressure should build from 85 to 100 psi within how many seconds?
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12
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60
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20
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45
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20.
Why should you check your mirrors regularly to know where other vehicles are around you?
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To know whether you can make a quick lane change in an emergency.
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To better assess your own speed.
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To move out of their way if they want to get past.
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To flash the brake lights if you are being tailgated.
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