NEW MEXICO CDL AIR BRAKES PRACTICE TEST
6.
To check the slack adjusters on S-cam brakes, you should:
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release the parking brake valve and begin reducing the air pressure by stepping on and off the brake pedal.
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park on level ground, chock the wheels and release the parking brakes, then use gloves and pull hard on each slack adjuster that you can reach.
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park on level ground and fan off the air pressure by rapidly applying and releasing the foot brake.
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7.
To perform an applied leakage test, the vehicle’s air pressure should be built up to maximum pressure. Check the air gauge to see that the air pressure should drop no more than:
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1 psi for single vehicles and 3 psi for a combination of 2 vehicles.
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2 psi for single vehicles and 5 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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8.
Which of the following is not part of the air brake system?
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Air storage tanks
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Air filter
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Air compressor
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9.
If you are being tailgated, you should:
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avoid quick changes.
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increase your following distance.
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All of the above.
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10.
After supplying air to the trailer brake system, you should check the brake system for crossed air lines by:
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applying and releasing the trailer brakes and listening for the sound of trailer brakes.
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shutting the engine off so you can hear the brakes.
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All of the above.
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