The device shown in the illustration is used to __________. GS-0029

Correct Answer: Option D — unload the cylinders of an air compressor

Unloaders are mechanical devices designed to hold the suction valves open during the starting cycle or when the compressor reaches its cut-out pressure. This reduces the motor's starting torque requirements and allows the compressor to run in an unloaded state, preventing excessive cycling and mechanical strain on the drive motor.