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.
You must take the CDL skills tests in the type of vehicle for which you wish to be licensed. If your test vehicle does not have air brakes:
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you'll need to take another knowledge test about air brakes.
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you'll have to immediately retake your test using another vehicle.
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you will be restricted to driving vehicles without air brakes.
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2.
Typically an air system is fully-charged at:
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75 psi
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125 psi
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25 psi
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3.
If your vehicle does not have automatic air tank drains, how often should you drain air tanks to remove moisture and oil?
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Every 4 hours.
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Once a week.
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At the end of each working day.
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4.
The ________ brake system applies and releases the brakes when the driver uses the brake pedal during normal driving.
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service
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parking
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emergency
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5.
You are driving on a steep downgrade. If your safe speed is 35 mph, you should apply the brakes when your speed reaches:
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25 mph
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30 mph
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35 mph
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