Which of the following identifies the three types of feeds in refrigeration systems?

The correct answer identifies the three types of feeds in refrigeration systems as DX (direct expansion), overfeed, and flooded.

In refrigeration, these terms refer to different methods of refrigerant distribution within a system. Direct expansion systems are characterized by refrigerant being introduced directly into the evaporator, allowing for efficient heat absorption and cooling. Overfeed systems involve feeding more refrigerant into the evaporator than is necessary for the cooling process, ensuring that the evaporator is fully utilized and operates under optimal conditions. Flooded systems, on the other hand, maintain a liquid refrigerant in the evaporator to maximize heat absorption.

Understanding these types helps in designing and troubleshooting refrigeration systems, as each system type has its pros and cons, applicable conditions, and efficiency metrics. The correct identification of these systems is essential for effective refrigeration management and optimization.