Question 220Refrigeration & AC - Assistant Engineer

The correct answer is A) box temperature actuated thermostat. A box solenoid valve in a multi-box refrigeration system is operated by a box temperature actuated thermostat. The thermostat senses the temperature inside the refrigerated box and opens or closes the solenoid valve to control the flow of refrigerant and maintain the desired temperature. The other options are incorrect because a discharge pressure actuated pressure switch, a suction pressure actuated pressure switch, and an evaporator outlet temperature actuated thermostat are not the control devices that operate the box solenoid valve. These devices may be used for other purposes in the refrigeration system, but they do not directly control the box solenoid valve.