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Oregon 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 Idaho Commercial Driver’s 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.
What is brake lag?
The time required for the brakes to work after the brake pedal is pushed
The distance between the brake pedal’s resting position and the floor
The amount of air pressure used to stop a vehicle
How faded the brakes are
2.
How many air storage tanks are used in an air brake system?
Two tanks
Four tanks
Six tanks
The number varies.
3.
Most heavy-duty vehicles use ____ air brake systems.
Single
Dual
Triple
Quad
4.
Most heavy-duty vehicles use:
Single air brake systems.
Dual air brake systems.
Triple air brake systems.
Quadruple air brake systems.
5.
To stop a vehicle using air brakes:
The brake pedal should be depressed.
The brake pedal should be lifted.
The brake knob should be pulled out.
The brake knob should be pushed in.
6.
All air tanks must include:
A drain valve.
A lock.
A trap door.
A warning sticker.
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