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Mechanical force.
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Air pressure.
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Gravity.
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Delaware CDL Permit Test - Air Brakes
(From the 2021 Delaware 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 or four answer choices. To pass, the applicant must answer at least 20 questions correctly. Test questions come from the State of Delaware 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.
An emergency brake must be controlled by:
2.
A vehicle equipped with an Anti-Lock Braking System (ABS) uses a ____ light to warn that the system is not working properly.
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Green
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Yellow
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Orange
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White
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3.
A dual air brake system:
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Has a single air brake system, but uses two sets of controls.
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Has one air brake system for each side of the truck.
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Has two brakes for each wheel.
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Has two separate air brake systems, but uses a single set of controls.
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4.
The brake pedal is part of which braking system?
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The service brake system
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The parking brake system
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The emergency brake system
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The auxiliary brake system
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5.
If the safety relief valve in an air brake system is releasing air:
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You should not be concerned as this is a normal process.
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There is something wrong with the brakes.
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The valve is operational.
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6.
A wig wag is:
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A low pressure warning device.
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A tube that carries air to the brakes.
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A type of air brake system.
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