In Partnership with Iowa Tribe of Oklahoma Library
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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.
At 55 mph, the total stopping distance for vehicles with air brake systems traveling in ideal conditions is:
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over 450 feet.
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less than 250 feet.
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over 250 feet.
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2.
With a dual air brake system:
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each system has its own air tanks, hoses and lines.
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each system shares the same lines and hoses.
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each system shares air tanks.
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3.
In a vehicle with a dual air brake system:
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one system supplies air to the trailer.
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each system has its own air tanks.
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both systems typically operate the regular brakes on the rear axle.
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4.
If you must stop on a one-way or divided highway, you should place warning devices _______ toward the approaching traffic.
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10, 100 and 200 feet
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5, 50 and 500 feet
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5, 25 and 50 feet
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5.
When driving at night, you should:
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drive slowly enough to see obstacles with your headlights.
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look directly at the lights of oncoming vehicles.
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put your own high beams on if other drivers don't put their low beams on.
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