🔍 Key Concepts

• Function of lube oil in a compressor crankcase (cooling, lubrication, sealing) • Effects of foaming on lubrication (air entrainment, loss of oil film strength) • Relationship between poor lubrication and component temperature or damage

💭 Think About

• If the crankcase oil is full of foam (air bubbles), what happens to its ability to carry away heat from moving parts? • Which component in the compressor relies most directly on a solid, continuous oil film to prevent metal-to-metal contact? • Look at each option: which one is MOST directly and immediately caused by loss of effective lubrication, rather than long-term deposits or low-temperature issues?

✅ Before You Answer

• Verify which option is tied to loss of oil film and increased friction. • Eliminate any answers that involve slow, long-term buildup rather than an immediate operational condition. • Check which choice does NOT fit with what happens when refrigerant separates out as foam in the crankcase oil (think heat and friction, not low-temperature effects).