Question 107Refrigeration & AC - 1st Asst/Chief

The correct answer is B) box temperature actuated thermostat. The box temperature actuated thermostat is the control device that operates the box solenoid valve in a multi-box refrigeration system. This thermostat monitors the temperature inside the refrigerated box and opens or closes the solenoid valve to maintain the desired temperature setpoint. The other options are incorrect because they do not directly control the box solenoid valve. The evaporator outlet temperature (A), discharge pressure (C), and suction pressure (D) are not directly tied to the box temperature and would not be the primary control device for the box solenoid valve.