TX 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 Texas CDL knowledge test. The TX 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 Texas CDL Manual. Take this TX CDL practice test now to prepare for the actual air brakes test!
1.
When you make a quick lane change, the crack-the-whip effect can turn the trailer over. The crack-the-whip effect is caused by:
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rearward amplification.
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the rear trailer of a triple.
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strong wind.
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worn tire tread.
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2.
Which of the following is not a way to know when to change gears?
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Check that the pressure gauge shows normal oil pressure
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Use road speed (mph)
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Watch your tachometer
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Use engine speed (rpm)
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3.
Air tanks usually hold enough compressed air to allow the brakes to be used _________ even if the compressor stops working.
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for 3 days
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for one stop
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several times
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for one day
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4.
The spring brakes come on:
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when main air pressure is lost.
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when you bring the vehicle to a complete stop right away.
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when air pressure in both air brake systems rises to a value set by the manufacturer.
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when you lose ABS control.
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5.
Your mirrors should be adjusted so that:
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a part of the vehicle is visible in the mirror.
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more than half of the mirror shows the vehicle.
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the rear of the vehicle is visible in the mirror.
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no part of the vehicle is visible in the mirror.
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