ESCO Air Conditioning Practice Exam 2025 - Free AC Certification Practice Questions and Study Guide

The primary function of a liquid receiver in a refrigeration or air conditioning system is to store liquid refrigerant. This component plays a crucial role in maintaining the proper flow and pressure of refrigerant within the system. By providing a designated space for the refrigerant to be held in its liquid state, the receiver ensures that there is enough refrigerant available for the evaporator coil, allowing for efficient heat exchange.

Additionally, the design of the liquid receiver helps to separate the liquid refrigerant from any vapor that may have been produced in the system, allowing for a more controlled and efficient operation. This storage capability ensures that the system can respond to varying cooling loads without the risk of starving the evaporator or overloading the compressor with liquid refrigerant. Thus, the liquid receiver is essential for maintaining a balanced and effective refrigeration cycle.

While other options refer to important functions, they do not capture the primary role of the liquid receiver, which is to provide a reliable volume for liquid refrigerant storage.