AIR BRAKES PRACTICE TEST - TENNESSEE
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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 Tennessee CDL knowledge test. The TN 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 Tennessee CDL Manual. Take this TN CDL practice test now to prepare for the actual air brakes test!
1.
In vehicles with air brakes, water and compressor oil in the bottom of the air tank:
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should be drained completely.
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should not be removed.
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should be added regularly.
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None of the above.
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2.
Before driving a vehicle with a dual brake brake system, the driver should:
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wait at least 5 minutes before driving.
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wait at least 10 minutes before driving.
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allow time for the air compressor to build up a minimum of 100 psi pressure in both the primary and secondary systems.
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pump the brake pedal 10 times to build pressure.
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3.
Empty trucks require _____ stopping distances because empty vehicles have ______ traction.
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greater; more
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less; more
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less; less
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greater; less
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4.
Which of the following is NOT TRUE? When you drive a tractor-trailer combination with ABS, you should:
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monitor your tractor and trailer as you slow down, and if it is safe to do so, back off the brakes to stay in control.
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use only the braking force necessary to stop safely.
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brake the same way, regardless of whether you have ABS on the tractor, the trailer, or both.
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drive slower to keep your vehicle in a straight line.
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5.
If a load is placed on one side of the trailer:
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the steering axle weight will be too light to steer safely.
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your brakes won't work.
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making turns may be easier.
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a rollover is more likely.
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