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The time required for the brakes to work after the brake pedal is pressed
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The distance between the brake pedal and the floor
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The amount of air pressure used to stop the vehicle
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Kentucky CDL Permit Test - Air Brakes
(From the 2020 Kentucky CDL driver handbook)
| Number of questions: | 25 |
| Passing score: | 20 |
Directions:
This endorsement is required for driving a vehicle with air brakes. To receive this endorsement, applicants must pass a written test. The test consists of 25 multiple choice questions. Each question has three answer choices. To pass, the applicant must answer at least 20 questions correctly. Test questions come from the Kentucky Commercial Driver License Manual. Questions come from the chapter covering: Air Brakes. The Air Brakes endorsement may be used with the Class A, B or C CDL.
Passing grade —
5 or fewer errors
advertising
1.
What is brake lag?
2.
If the low air pressure warning signal comes on in a vehicle with air brakes, the driver should:
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Test the brakes while driving, but continue driving if nothing seems wrong.
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Immediately stop driving.
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Drive with the hazard lights activated.
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3.
To make a stop in a vehicle equipped with air brakes, the driver should:
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Press the brake pedal down.
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Lift the brake pedal up.
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Pull out the air brake knob.
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4.
Braking mechanisms are located inside:
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The fifth wheel.
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A brake drum.
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The landing gear.
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5.
When you are about to start down a hill, you should switch into a ____ gear.
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Higher
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Faster
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Lower
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6.
In a dual air brake system:
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Air tanks are shared between both systems.
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Each system has its own air tanks.
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You must designate which system you are using.
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