Question 48Refrigeration & AC - QMED

The correct answer is D) release of miscible refrigerant from the lubricant in the crankcase. The term 'oil foaming' in refrigeration practice refers to the release of miscible refrigerant from the lubricant in the crankcase. This happens when the refrigerant dissolves into the lubricating oil, and then suddenly evaporates, causing the oil to foam up. This can be a problem in refrigeration systems, as it can lead to issues with lubrication and system performance. The other options are incorrect because they do not accurately describe the phenomenon of 'oil foaming' in refrigeration practice. Option A refers to the release of dissolved lubricant, which is not the same as the release of miscible refrigerant. Options B and C describe the evaporation of moisture or air, which are not the focus of the 'oil foaming' term.