WY 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 Wyoming CDL knowledge test. The WY 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 Wyoming CDL Manual. Take this WY CDL practice test now to prepare for the actual air brakes test!
1.
The air brake lag distance at 55 mph on dry pavement adds about:
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16 feet.
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32 feet.
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60 feet.
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75 feet.
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2.
When driving on long and/or steep downgrades, to select an appropriate safe speed you should consider:
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the length of the grade.
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the road conditions.
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the total weight of the vehicle and cargo.
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All of the above.
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3.
If a vehicle is equipped with ABS, when you start the engine:
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the ABS indicator light on the dash should come on and then turn off.
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the trailer emergency brakes will come on.
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the wheels will lock up.
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the spring brakes will come on.
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4.
The braking power of the spring brakes:
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depends on the brakes being in adjustment.
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is not affected by the condition of the service brakes.
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is not affected by the air pressure level.
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All of the above.
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5.
A broken exhaust system:
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poses no threat to the driver.
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can improve fuel efficiency.
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can let poisonous carbon monoxide to leak into the cab.
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does not cause problems.
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