AIR BRAKES CDL PRACTICE TEST - PENNSYLVANIA
21.
If the air tanks are not drained:
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your speed must be reduced to 5 MPH below your “safe” speed.
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the spring brakes will come on.
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the water can freeze in cold
weather and cause brake failure.
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the air pressure in the tanks is reduced.
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22.
Empty trucks require _____ stopping distances because empty vehicles have ______ traction.
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less; less
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greater; less
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greater; more
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less; more
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23.
The s-cam:
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pulls the brake shoes away from the drum.
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helps ensure that air flows to all trailers.
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forces the brake shoes away from one another and presses them against the inside of the brake drum.
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All of the above.
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24.
If your ABS is not working:
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you still have normal brake functions, and should drive and brake as you always have.
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you should immediately bring your vehicle to a complete stop.
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it will slow your truck to a halt and force you to pull over.
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the drive wheels will begin to spin, and you should take your foot off the accelerator.
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25.
If your vehicle has an alcohol evaporator, every day during cold weather, you should:
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fill it up with oil to prevent alcohol from freezing.
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fill it up with oil to prevent the pipes from freezing.
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ensure that compressed air usually has some water and some compressor oil in it.
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check the alcohol container and fill up as necessary.
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