🔍 Key Concepts

• Slugging in a refrigeration compressor and what typically causes liquid return to the compressor • The function of the expansion valve in controlling refrigerant flow and superheat • How low superheat / flooding back is corrected in normal system adjustments

💭 Think About

• Ask yourself: Which option directly affects how much liquid vs. vapor refrigerant leaves the evaporator and returns to the compressor? • Consider which choice would actually stop liquid from coming back, rather than just changing pressures or adding more refrigerant. • Which component is responsible for maintaining proper superheat at the evaporator outlet so only vapor returns to the compressor?

✅ Before You Answer

• Identify which device directly controls refrigerant flow and superheat at the evaporator outlet. • Rule out any option that would likely increase liquid in the system or not address liquid return to the compressor. • Focus on the component whose improper setting is a common cause of both slugging and flooding back.