🔍 Key Concepts

• Function of an oil separator in a refrigeration/recovery system • Difference between oil contamination vs liquid refrigerant slugging in a compressor • What must be true about each statement for choice D) all the above to be correct

💭 Think About

• Look at where the suction-side oil separator is located in relation to the disabled system and the recovery unit’s compressor. What is it trying to keep out of the compressor? • Which of the listed problems would be most immediately dangerous to the recovery compressor’s mechanical parts? Which sound more like maintenance or accounting of oil quantity? • If the separator only does one main job, could it realistically fulfill all three descriptions at once?

✅ Before You Answer

• Identify whether the separator is on the suction line before or after the recovery compressor and what flows through that point (gas, liquid, oil). • Decide which options describe primary protection of the recovery compressor versus secondary benefits to the serviced unit. • Before choosing D, check that each individual option clearly matches what an oil separator actually does in that position in the circuit.