🔍 Key Concepts

• Oil breakdown and carbonization in compressor crankcases • Relationship between temperature and sludge formation in lubricating oil • Meaning of terms: foaming, cloud/floc point, and their typical effects on oil

💭 Think About

• Which condition would actually cause the oil to chemically degrade and leave solid deposits that look like sludge? • Think about whether sludge is more likely to form when oil is too hot, too cold, or just aerated (foaming). • What do cloud point and floc point usually describe in fuel and oil behavior, and are they associated with sludge inside a warm running compressor?

✅ Before You Answer

• Identify which option clearly involves thermal decomposition or burning of oil components. • Eliminate any options that mainly affect appearance or air bubbles in the oil rather than chemical breakdown. • Confirm which condition is typically associated with varnish, carbon, or sludge deposits in machinery lubricating systems.