The term "oil foaming" in refrigeration...

Question 1 / 2707066636eee28f7522a1c51f46b

Question 1 of 2707066636eee28f7522a1c51f46b

The term "oil foaming" in refrigeration practice, is used to describe what event?

Question 1 of 27070

The term "oil foaming" in refrigeration practice, is used to describe what event?

🔍 Key Concepts

• Behavior of refrigerant and lubricating oil inside a compressor crankcase • What happens when pressure or temperature suddenly changes in the crankcase • Difference between dissolved gases/liquids and entrapped (bubbled or mixed) gases/liquids

💭 Think About

• Think about which substance is mainly responsible for visible foaming in the crankcase: is it the oil, the refrigerant, moisture, or air? • Ask yourself: when a compressor starts or stops, what could suddenly change that might cause bubbles or foam to appear in the oil? • Consider which option would create the most violent, rapid bubbling action inside the crankcase.

✅ Before You Answer

• Verify which fluid (refrigerant, moisture, or air) is most likely to be dissolved in the lubricant under normal operating pressure. • Check which event would cause a sudden release of bubbles from the oil, making it look like foam. • Eliminate any answers that involve substances that are normally kept out of the system (like moisture and non‑condensable air).

Question 1 of 27070

The term "oil foaming" in refrigeration practice, is used to describe what event?

release of dissolved lubricant from the refrigerant in the crankcase

sudden evaporation of dissolved refrigerant from the lubricant in the crankcase

sudden evaporation of entrapped moisture from the crankcase lubricant

sudden evaporation of entrapped air from the refrigerant liquid

Question 1 / 2707066636eee28f7522a1c51f46b

Question 1 of 2707066636eee28f7522a1c51f46b

The term "oil foaming" in refrigeration practice, is used to describe what event?

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Question 1 of 27070

The term "oil foaming" in refrigeration practice, is used to describe what event?