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Arizona 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 Arizona 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.
You have made error so far
Passing grade —
5 or fewer errors
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1.
When leaving your vehicle unattended:
The parking brake must be always be used.
The parking brake should never be used.
Windows in the cab should be lowered.
2.
If the low air pressure warning signal comes on in a vehicle with air brakes, the driver should:
Test the brakes while driving, but continue driving if nothing seems wrong.
Immediately stop driving.
Drive with the hazard lights activated.
3.
Failing to drain air tanks could result in:
Water accumulations freezing and causing brake failure.
Squishy brakes.
Too much air collecting in the tanks.
4.
The air compressor is connected to the:
Transmission.
Engine.
Radiator.
5.
An emergency brake must be controlled by:
Mechanical force.
Air pressure.
Gravity.
6.
Some water and compressor oil is usually found in the compressed air within an air brake system. The water and compressor oil:
Are necessary for the proper function of the system.
Should take up about 10 percent of the tank.
Should be removed regularly.
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