Question 51Refrigeration & AC - QMED

The correct answer is B) The control bulb is located on the evaporator coil outlet. The thermostatic expansion valve regulates the flow of refrigerant into the evaporator coil based on the temperature of the refrigerant at the evaporator outlet. The control bulb, which senses the temperature, is located on the evaporator coil outlet to monitor the superheat of the refrigerant. This allows the expansion valve to adjust the refrigerant flow to maintain the proper amount of superheat, ensuring efficient operation of the refrigeration system. The other options are incorrect because: A) The thermostatic expansion valve does not directly regulate the temperature of the refrigerated space. C) The thermostatic expansion valve regulates superheat, not the solenoid valve. D) The external equalizing pipe is connected to the evaporator coil outlet, not the liquid receiver.