OKLAHOMA 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 Oklahoma CDL knowledge test. The OK 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 Oklahoma CDL Manual. Take this OK CDL practice test now to prepare for the actual air brakes test!
1.
Brake fade results from, and is affected by:
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excessive heat caused by using the brakes too much.
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brakes out of adjustment.
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All of the above.
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2.
If you are being tailgated, you should:
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speed up.
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increase your following distance.
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move to the left lane.
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3.
The most common type of brake is the:
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G-cam disc brake
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S-cam drum brake
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R-cam drum brake
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4.
Axle weight is:
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the weight of all the axles added together.
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the weight transmitted to the ground by one axle or one set of axles.
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the maximum safe weight your tires can carry at a specified pressure.
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5.
On
a tractor-trailer equipped with a trailer brake hand
valve, the hand valve can be used to:
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hold compressed air.
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keep from rolling back.
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prevent movement of cargo.
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