Question 113Refrigeration & AC - QMED

The correct answer is B) gray or metallic. When a refrigeration compressor experiences bearing wear or piston scoring, the resulting metal particles from the wear will be visible in the compressor's oil, causing the oil to appear gray or metallic in color. This is because the metal particles from the damaged components are suspended in the oil, which alters its appearance. The other answer choices are incorrect because: A) the heavier metal particles would not gravitate to the bottom of the sump, but rather remain suspended in the oil; C) a light blue-green color would not be indicative of bearing wear or piston scoring; and D) black oil would indicate a different issue, such as contamination, rather than the specific problem described in the question.