AIR BRAKES CDL PRACTICE TEST - MISSISSIPPI
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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 Mississippi CDL knowledge test. The MS 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 Mississippi CDL Manual. Take this MS CDL practice test now to prepare for the actual air brakes test!
1.
The use of brakes on a steep downgrade is:
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the main braking factor.
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dangerous, and should be avoided at all costs.
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a supplement to the braking effect of the engine.
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much more effective than the engine braking effect.
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2.
You hear a loud "bang" which sounds like a tire blowout. You should:
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check the tires at the next stop.
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assume you
have a tire failure.
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keep driving as normal.
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inspect your tires with your mirrors.
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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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Check air compressor governor cut-in and cut-out pressure.
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Test low pressure warning signal.
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All of the above.
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4.
When meeting an oncoming vehicle at night, if the other driver does not put their low beams on, you should:
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look slightly to the right to avoid looking directly at the lights of the oncoming vehicle.
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flash your high beams at the other driver.
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"get back at the other driver" by putting your own high beams on.
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slow down and look straight ahead in your lane.
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5.
In combination vehicles with air brakes, the trailer air supply control should pop out when the air pressure falls within the range of:
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10 to 20 psi
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50 to 75 psi
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100 to 120 psi
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20 to 45 psi
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