Grimsley High
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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 North Carolina CDL knowledge test. The NC 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 North Carolina CDL Manual. Take this NC CDL practice test now to prepare for the actual air brakes test!
1.
Dual tires:
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should not come in contact with each other.
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are dangerous.
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should come in contact with each other whenever possible.
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should always come in contact with each other.
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2.
The ABS malfunction lamp on the instrument panel is:
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Blue
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Red
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Orange
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Yellow
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3.
If a vehicle is equipped with ABS, when you start the engine:
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the spring brakes will come on.
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the wheels will lock up.
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the trailer emergency brakes will come on.
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the ABS indicator light on the dash should come on and then turn off.
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4.
The supply pressure gauges tell you how much air pressure:
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is going to the brake chambers.
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you are applying to the brakes.
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is in the air brakes.
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is in the air tanks.
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5.
During a trip you should check:
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temperature gauges.
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pressure gauges.
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mirrors.
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All of the above.
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