VERMONT CDL AIR BRAKES PRACTICE TEST
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The air brakes endorsement applies to applicants who wish to drive a vehicle with air brakes in Class A, B, or C CDL. To drive a vehicle with air brakes, you must pass the air brake component of the Vermont CDL knowledge test. The VT CDL air brakes test consists of 25 questions, and you'll need at least 20 correct answers to pass (80%). The test covers the information found in the air brakes section of the Vermont CDL Manual. Take this VT CDL practice test now to prepare for the actual air brakes test!
1.
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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helps the engine only under hot conditions.
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2.
Brake drums or discs must not have cracks longer than ____ the width of the friction area.
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1/3
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1/2
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1/4
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3.
Brake fade results from:
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excessive use of the service brakes.
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excessive wear.
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excessive speeding.
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4.
With the air pressure built up to governor cutoff, the maximum leakage rates per minute are ___ psi for single vehicles and ___ psi for a combination of 2 vehicles.
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3; 4
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5; 6
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3; 2
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5.
If air doesn't flow all the way to the back:
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your brakes will not work properly.
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a rollover is more likely.
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the trailer will tend to swing around.
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