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Virginia 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 Virginia 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.
The two markings on a front brake limiting valve usually read:
"Normal" and "slippery."
"Low" and "high."
"Left" and "right."
2.
Using an Anti-Lock Braking System (ABS):
Is required in some states.
Shortens brake response time.
Provides additional control.
3.
When leaving your vehicle unattended:
The parking brake should be used.
The parking brake only needs to be used if the vehicle is parked on a slope.
The parking brake should not be used, as it can damage the tires.
4.
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.
5.
Which of the following is not part of a vehicle’s air brake system?
Air gauges
Low pressure warning device
Air filter
6.
Air tank drains should:
Only be used by mechanics.
Only be used when it is wet outside.
Be used to drain the tanks completely.
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