CDL AIR BRAKES PRACTICE TEST - MISSOURI
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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 Missouri CDL knowledge test. The MO 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 Missouri CDL Manual. Take this MO CDL practice test now to prepare for the actual air brakes test!
1.
Most heavy-duty vehicles use:
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triple air brake systems.
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dual air brake systems.
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single air brake systems.
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2.
During a trip you should check:
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pressure gauges.
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temperature gauges.
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All of the above.
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3.
Emergency brakes are:
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not required on doubles.
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required on all vehicles.
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not required on buses.
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4.
In vehicles with air brakes, the two markings on a front brake limiting valve are:
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left and right.
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high and low.
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normal and slippery.
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5.
Which of the following is not a way to know when to change gears?
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Use road speed (mph)
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Check that the pressure gauge shows normal oil pressure
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Use engine speed (rpm)
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