Question 219Refrigeration & AC - Assistant Engineer

You are correct, the answer is A) the refrigerated box temperature. The thermostat controlling the solenoid valve to a refrigerated box evaporator senses the temperature inside the refrigerated box, not the compressor discharge temperature, evaporator coil outlet temperature, or evaporator coil inlet temperature. The thermostat is designed to maintain the desired temperature setpoint within the refrigerated box by opening and closing the solenoid valve to control the flow of refrigerant to the evaporator coil. The other options are incorrect because they do not directly relate to the control of the refrigerated box temperature. The compressor discharge temperature, evaporator coil outlet temperature, and evaporator coil inlet temperature are more relevant to the overall refrigeration system performance, but do not directly impact the thermostat's control of the solenoid valve.