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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 Alabama CDL knowledge test. The AL 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 Alabama CDL Manual. Take this AL CDL practice test now to prepare for the actual air brakes test!
1.
The s-cam:
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forces the brake shoes away from one another and presses them against the inside of the brake drum.
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pulls the brake shoes away from the drum.
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helps ensure that air flows to all trailers.
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All of the above.
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2.
The air tanks should be drained completely to remove:
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air.
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carbon monoxide.
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the radiator cap.
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water and oil.
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3.
As part of the final air brake check, you should:
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Test air leakage rate.
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Test low pressure warning signal.
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Check air compressor governor cut-in and cut-out pressure.
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All of the above.
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4.
If the spring brakes do not release when you push the trailer air supply control, you should:
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check the electrical cables.
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rev or
lug the engine.
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pump the brakes.
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check the air line connections.
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5.
When driving a 60 foot truck at 35 mph in ideal conditions, you should keep at least _______ of space in front of you.
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5 seconds
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6 seconds
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4 seconds
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12 seconds
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6.
If an aggressive driver is involved in an accident down the road, you should:
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try to get their vehicle to the side of the road.
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make eye contact with the driver.
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stop a safe distance from the accident scene, wait for the police and report the behavior you witnessed.
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confront the aggressive driver.
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7.
To use the controlled braking method in an emergency, you should:
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apply your brakes all the way, and release the brakes when the wheels lock up.
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pump the brake pedal 3 times.
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apply the brakes as hard as you can without locking the wheels.
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apply the brakes when the wheels lock up.
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8.
Rough acceleration:
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is recommended during long trips.
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improves gas mileage.
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can cause mechanical damage.
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is necessary to warm up the engine.
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9.
Empty trucks have the best braking. True or False?
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False.
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True.
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It depends on the cargo.
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It depends on the truck.
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10.
When the spring brakes are on, you should:
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press the accelerator.
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exceed the posted speed limit.
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not push the brake pedal down.
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pump the brakes.
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