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New Mexico 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 New Mexico 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
Which of the following is not part of a vehicle’s air brake system?
Air gauges
Low pressure warning device
Air filter
The ____ between an air compressor and reservoir tank prevents air from escaping if the air compressor has a leak.
Slack adjuster
One-way check valve
Tractor protection valve
Vehicles equipped with Anti-Lock Braking Systems (ABS) have ____ malfunction lamps to indicate when the ABS is not working.
Using the brakes creates heat. If too much heat is produced:
The brakes may not work.
The brakes may squeak more than usual.
The brakes will brake unevenly.
You must have an air brake endorsement:
To use a vehicle with air brakes.
To drive any truck with a trailer.
To transport hazardous materials.
During a static leakage test, what is the maximum leakage rate that is safe for a double combination vehicle?
3 psi in one minute.
6 psi in one minute.
8 psi in one minute.
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