🔍 Key Concepts

• Location of an oil separator in a typical refrigeration or air conditioning cycle • Difference between compressor suction and compressor discharge lines • Approximate temperature and phase (gas or liquid) of refrigerant at different points in the system

💭 Think About

• In a refrigeration system, at what point does oil tend to leave the compressor and travel with the refrigerant? Is it when the refrigerant is a gas or a liquid? • Is the compressor suction line usually hot or cold compared to the discharge line? Think about compression and what it does to temperature. • Would you normally try to separate oil from a gas or from a high‑pressure liquid in these systems?

✅ Before You Answer

• Identify where the compressor discharge is in the cycle and whether the refrigerant there is hot or cold, gas or liquid. • Confirm whether an oil separator is generally installed on the suction side or the discharge side of the compressor. • Eliminate any choices that describe conditions where the refrigerant would mainly be a liquid, rather than a gas, leaving the compressor.