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South Carolina
Air Brakes #4
Practice Test
How can you check that your service brakes are functioning properly?
Drive at a high speed, then slam on the brakes to see if the vehicle stops quickly.
Park on a slight slope, drain off air pressure, set the parking brake and check movement.
Park on level ground, wait until normal air pressure is reached, release the parking brake and move forward slowly at about 5 mph. Then apply the brakes firmly.
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