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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.
You have made error so far
Passing grade —
5 or fewer errors
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1.
What color is the low air pressure warning light?
Green
Orange
Red
Purple
2.
Foundation brakes are used:
Only on the front wheels of a vehicle.
Only on the rear wheels of a vehicle.
On each wheel of a vehicle.
3.
Truck tractors with air brakes built on or after March 1, 1997 must have:
An Anti-Lock Braking System (ABS).
Bluetooth.
A GPS.
4.
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.
5.
A dual air brake system:
Has a single air brake system, but uses two sets of controls.
Has one air brake system for each side of the truck.
Has two brakes for each wheel.
Has two separate air brake systems, but uses a single set of controls.
6.
If you are driving and the ABS light comes on, it means that the ABS:
Cannot work due to weather conditions.
Has just been activated.
Is not working properly.
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