AIR BRAKES PRACTICE TEST - MARYLAND
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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 Maryland CDL knowledge test. The MD 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 Maryland CDL Manual. Take this MD CDL practice test now to prepare for the actual air brakes test!
1.
When you push the brake pedal down, air brakes work:
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only when ABS is working.
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after about 15 seconds.
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after a short delay.
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immediately.
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2.
After starting the engine, oil pressure should rise to a normal level:
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within seconds.
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within 2 minutes.
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within 3 miles.
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within 6 minutes.
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3.
Axle weight is:
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the weight transmitted to the ground by one axle or one set of axles.
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the weight of all the axles added together.
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the value specified by the manufacturer as the loaded weight of one axle.
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the maximum safe weight your tires can carry at a specified pressure.
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4.
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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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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5 psi for single vehicles and 6 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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5.
When the wheels of a trailer lock up:
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ABS will increase stopping power.
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the trailer will tend to swing around.
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the vehicle will gradually come to a complete stop.
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All of the above.
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