Refrigeration Plant Operator B Practice Test

The fan is critical for controlling airflow in a cooling system because it actively circulates air across the evaporator and condenser coils, aiding in heat exchange. By drawing air over the evaporator, the fan allows for the absorption of heat from the air into the refrigerant, which cools the air before it is recirculated into the space being cooled. Additionally, the fan helps reject heat from the refrigerant into the outdoor environment when working with the condenser.

While other components, such as the thermostat, compressor, and expansion valve, play significant roles in the overall refrigeration cycle, they do not directly control airflow. The thermostat manages temperature settings, the compressor circulates the refrigerant through the system, and the expansion valve regulates refrigerant flow to the evaporator. Therefore, the fan is the component specifically tasked with ensuring proper airflow in the cooling system.