🔍 Key Concepts

• Location and function of the evaporator in a refrigeration cycle • Difference between liquid, saturated mixture, and superheated vapor states • What happens to pressure and temperature of the refrigerant as it absorbs heat in the evaporator

💭 Think About

• Think about what the refrigerant is doing inside the evaporator: is it giving up heat or absorbing heat, and how does that change its state? • Trace the standard refrigeration cycle: compressor → condenser → expansion device → evaporator. In which section is the refrigerant mostly liquid, and in which is it mostly vapor? • Ask yourself: if the refrigerant left as a liquid, would it be safe for the compressor, or does the compressor want vapor only?

✅ Before You Answer

• Confirm the primary purpose of the evaporator (what it does to the refrigerant and cargo/space being cooled) • Identify whether the outlet of the evaporator goes to the suction side of the compressor and what state the refrigerant must be in there • Eliminate any choices that describe a clearly liquid-only condition if you know the compressor should not ingest liquid