CDL AIR BRAKES PRACTICE TEST - WISCONSIN
11.
The ______ puts alcohol into the air system.
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air tank drains
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alcohol evaporator
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alcohol tank drains
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alcohol storage tank
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12.
On
a tractor-trailer equipped with a trailer brake hand
valve, the hand valve can be used to:
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reduce the chance of the front wheels skidding.
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keep from rolling back.
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prevent movement of cargo.
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hold compressed air.
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13.
You are coming down a long, steep downgrade. Which of the following is a sign that your brakes may have started to fade?
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You have to apply your brakes harder and harder to get the same stopping power.
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The brake pedal feels spongy or goes to the floor.
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The steering feels heavy.
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You hear a loud "bang".
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14.
When the air system is fully-charged, the air loss rate for a single vehicle with the engine off should be less than:
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2 psi in 30 seconds.
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2 psi in one minute.
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4 psi in one minute.
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3 psi in one minute.
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15.
When you apply the brakes, the brake shoes and linings are pushed against:
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the s-cam.
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the air compressor.
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slack adjusters.
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the inside of
the brake drum.
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