NM CDL AIR BRAKES PRACTICE TEST
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The air brakes endorsement applies to applicants who wish to drive a vehicle with air brakes in Class A, B, or C CDL. To drive a vehicle with air brakes, you must pass the air brake component of the New Mexico CDL knowledge test. The NM CDL air brakes test consists of 25 questions, and you'll need at least 20 correct answers to pass (80%). The test covers the information found in the air brakes section of the New Mexico CDL Manual. Take this NM CDL practice test now to prepare for the actual air brakes test!
1.
How do you check that spring brakes come on automatically?
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Continue to step on and off the brake pedal until the air pressure falls to the manufacturer’s specification.
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On a tractor-trailer combination vehicle, continue to step on and off the brake pedal until the tractor protection valve and the parking brake valve close.
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All of the above.
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2.
When going down grades, you should:
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shift up.
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put the transmission in Neutral.
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downshift to a lower gear.
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3.
If a load is 10 feet long, the minimum number of tie-downs required is:
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3
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2
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1
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4.
The trailer hand valve should:
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never be used to test the trailer brakes.
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be used in driving.
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never be used for parking.
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5.
Rough acceleration:
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is necessary to warm up the engine.
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improves gas mileage.
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can cause mechanical damage.
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