CDL AIR BRAKES PRACTICE TEST - MINNESOTA
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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 Minnesota CDL knowledge test. The MN 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 Minnesota CDL Manual. Take this MN CDL practice test now to prepare for the actual air brakes test!
1.
If air pressure does not build up fast enough:
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the pressure may drop too low during driving.
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you should turn the electrical power on and step on and off the brake pedal.
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you may be forced to turn off the engine and release the parking brake.
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you should put the parking brake on and gently pull against it in a low gear.
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2.
Your vehicle has air brakes. To stop, you should:
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release the accelerator, push in the clutch, and shift to Neutral at the same time.
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pull the parking brake control knob out.
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push the brake pedal down.
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pump the brake pedal 3 times.
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3.
Trailers built on or after March 1, 1998 are required to be equipped with anti-lock brakes. These trailers will have:
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yellow malfunction lamps on the right side.
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blue malfunction lamps on the right side.
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red malfunction lamps on the left side.
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yellow malfunction lamps on the left side.
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4.
If your truck has automatic transmission, you should downshift:
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after entering a curve.
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when going down grades.
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whenever road conditions allow.
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when you need to accelerate.
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5.
As part of your vehicle inspection, you are checking that air flows to all trailers. After using the trailer handbrake to provide air to the service line, you go to the rear of the rig. When you open the emergency line shut-off valve at the rear of the last trailer, you should hear:
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the service line valve close.
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a mechanical vibration.
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a thumping sound.
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air escaping from the open valve.
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