Casey County Public Library
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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 Kentucky CDL knowledge test. The KY 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 Kentucky CDL Manual. Take this KY CDL practice test now to prepare for the actual air brakes test!
1.
On
a tractor-trailer equipped with a trailer brake hand
valve, the hand valve can be used to:
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hold compressed air.
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reduce the chance of the front wheels skidding.
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prevent movement of cargo.
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keep from rolling back.
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2.
A passive railroad crossing is one that:
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does not have any type of traffic control device.
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has a traffic control device installed at the crossing to regulate traffic.
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requires you to stop and wait until the traffic control device installed at the crossing tells you to proceed.
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has at least two traffic control devices installed at the crossing to regulate traffic.
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3.
To avoid becoming a distracted driver you should:
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adjust all vehicle controls and mirrors while driving.
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not engage in complex conversations with others.
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eat and drink while you drive.
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not turn off all communication devices.
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4.
When the spring brakes are on, you should push the brake pedal down:
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Never.
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Only when driving downhill.
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Only when driving uphill.
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Only when approaching railroad-highway crossings.
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5.
The air brake lag distance at 55 mph on dry pavement adds about:
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75 feet.
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60 feet.
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16 feet.
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32 feet.
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