🔍 Key Concepts

• Centrifugal purifiers work best when separation of water/solids from oil is easiest. • The viscosity of heavy fuel oil changes with temperature and affects separation efficiency. • Understand what throughput, additive percent, cetane number, and TBN number each describe.

💭 Think About

• Which of the four choices is directly related to how long the oil actually stays inside the purifier bowl during operation? • If you want the purifier to remove impurities more effectively, would you prefer the oil to pass through faster or slower? Think about residence time. • Which options (B, C, D) describe fuel QUALITY or chemical properties rather than how the purifier itself is operated?

✅ Before You Answer

• Identify which option controls the rate of flow through the purifier rather than a fuel-spec property. • Eliminate any options that are mainly used to describe diesel combustion characteristics or lubricating/neutralizing properties of the fuel. • Confirm that the remaining option is the one you would adjust on the purifier operating panel to improve separation.