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Kentucky CDL Permit Test - Air Brakes

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.
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Passing grade —
5 or fewer errors
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7.
What do the two systems of a dual air brake system share?
Hoses
An air compressor
Air tanks
8.
If the safety relief valve in the air brake system releases air:
The compressor needs more air.
The air pressure has become too high.
The brakes are fully operational.
9.
Brake fade is a result of:
Brakes being exposed to sunlight.
Brakes being exposed to moisture.
Excessive use of the brakes.
10.
Emergency brakes:
Are not required on vehicles with air brakes.
Are required only on buses.
Are required on all vehicles.
11.
Brakes can get out of adjustment quickly, especially:
If they are hot.
In the winter time.
If they are used frequently.
12.
An emergency brake must be controlled by:
Mechanical force.
Air pressure.
Gravity.
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