🔍 Key Concepts

• Centrifugal purifier internal flow path for oil, water, and solids • Where heavier solids migrate to in a centrifugal field • Difference between a purifier and a simple filter or overflow system

💭 Think About

• In a centrifugal purifier, which component or area is designed to collect the heaviest contaminants? • Which of the listed choices actually exists as a normal discharge stream in a lube oil purifier: clean oil, separated water, or accumulated sludge? • Think about what would happen if most solids regularly went out with the water or overflow—would the machine need frequent cleaning or not?

✅ Before You Answer

• Identify which parts of a centrifugal bowl are intended for sludge (solids) accumulation. • Confirm which streams are normally continuously discharged (oil and/or water) and which is periodically removed (sludge). • Eliminate any options that describe components not typically part of the centrifugal purifier itself (vs. the larger system).