🔍 Key Concepts

• Effect of temperature on oil viscosity (thickness) • How viscosity affects flow through filters and separation in a centrifuge • Why cleaner separation happens when contaminants and oil can move freely relative to each other

💭 Think About

• Think about what happens to oil when it is heated: does it get thicker or thinner, and how does that help it pass through small filter pores? • In a centrifuge, you want dirt and water droplets to move out of the oil under centrifugal force; would that motion be easier in thick, resistant oil or in thinner, more free‑flowing oil? • Which combination of temperature and viscosity would let the oil flow easily while still allowing the equipment to operate safely without damaging seals or pumps?

✅ Before You Answer

• Recall that higher temperature generally means lower viscosity for oil. • Ask yourself which option describes oil that is thinner/easier to pump and filter. • Eliminate any options where high viscosity would hinder flow through filters or slow separation in a centrifuge.