🔍 Key Concepts

• Function of fuel oil settling tanks in a marine fuel system • Difference between settling, purifying/centrifuging, and heating for atomization • What happens to water and sediment in fuel when left undisturbed

💭 Think About

• Think about what physical process occurs when fuel stands still in a tank for several hours and how gravity affects contaminants of different densities. • Consider which part of the fuel system is mainly responsible for getting fuel to the correct viscosity/temperature before the burners. • Ask yourself: which option best matches the word "settling" in terms of what is actually settling and why?

✅ Before You Answer

• Identify which component (settling tank, service tank, heaters, purifiers) is used to heat fuel for burner atomization. • Recall what a purifier/centrifuge does versus what simply leaving fuel undisturbed in a tank does. • Confirm that the main purpose of a settling tank is related to separation by gravity, not removal of gases or air bubbles.