Question 91Refrigeration & AC - QMED

The correct answer is D) at the suction side of the compressor. The low-pressure cutout switch is designed to protect the refrigeration system by shutting off the compressor when the suction pressure drops too low, which could indicate a problem like a lack of refrigerant. By connecting the sensing line to the suction side of the compressor, the switch can accurately monitor the suction pressure and trigger the cutoff when necessary. The other options are incorrect because they would not provide an accurate reading of the suction pressure. Connecting the sensing line to the discharge side, receiver inlet, or receiver outlet would not give an indication of the suction pressure, which is the critical factor for the low-pressure cutout switch.