Question 113Refrigeration & AC - 1st Asst/Chief

The correct answer is D) the refrigerated box temperature. The thermostat controlling the solenoid valve to a refrigerated box evaporator senses the temperature inside the refrigerated box, not the temperature at the evaporator coil outlet, compressor discharge, or evaporator coil inlet. The thermostat's purpose is to maintain the desired temperature within the refrigerated box, so it needs to measure the actual box temperature to properly control the evaporator operation. The other options are incorrect because they do not represent the temperature that the thermostat is monitoring to regulate the refrigeration system. The evaporator coil outlet, compressor discharge, and evaporator coil inlet temperatures are important for the overall system performance, but they are not the direct control point for the solenoid valve operation.