The purpose of an air compressor unloading device is to （）<br>A:drain water from the air receiver<br>B:drain water from the cylinders<br>C:delay the compression process until the motor is up to speed<br>D:check pump alignment

The purpose of an air compressor unloading device is to （）
A:drain water from the air receiver
B:drain water from the cylinders
C:delay the compression process until the motor is up to speed
D:check pump alignment

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