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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.
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Passing grade —
5 or fewer errors
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1.
Brake linings should be:
Loose.
Free of oil.
Soft.
2.
Lights that indicate that anti-lock brakes are not working are:
Gray.
Blue.
Yellow.
3.
Air pressure should build up in a single air system within:
15 minutes.
12 minutes.
Three minutes.
4.
The air storage tanks:
Hold only enough air for one braking cycle.
Hold enough air for the brakes to be used several times if the compressor stops working.
Do not hold air unless there is an emergency.
5.
ABS brakes:
Help you avoid wheel lockup.
Lock up your vehicle's wheels.
Prevent your vehicle from accelerating when going uphill.
6.
A safety valve is set to open at ____ pounds per square inch (psi).
100
150
200
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