MS 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 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.
An alcohol evaporator:
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protects the air brake system from too much pressure.
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used to reduce the chance of the front wheels skidding.
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to hold compressed air.
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is used to reduce the risk of ice in air brake valves and other parts during cold weather.
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2.
With the air pressure built up to governor cutoff, the maximum leakage rates per minute after the initial pressure drop are:
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5 psi for single vehicles and 6 psi for a combination of 2 vehicles.
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1 psi for single vehicles and 2 psi for a combination of 2 vehicles.
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4 psi for single vehicles and 2 psi for a combination of 2 vehicles.
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3 psi for single vehicles and 4 psi for a combination of 2 vehicles.
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3.
When going down grades, you should:
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rely solely on engine braking to reduce your speed.
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put the transmission in Neutral.
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downshift to a lower gear.
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shift up.
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4.
The most common foundation brakes found on vehicles with air brakes are the:
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wedge brakes.
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S-cam brakes.
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parking brakes.
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disc brakes.
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5.
On
a tractor-trailer equipped with a trailer brake hand
valve, the hand valve can be used to:
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hold compressed air.
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keep from rolling back.
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reduce the chance of the front wheels skidding.
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prevent movement of cargo.
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