🔍 Key Concepts

• Trace the piping from the line labeled "To SSDGs, EDG and Aux. Boiler" back to the tank(s) it comes from in the diagram. • Understand the normal roles of a service tank versus a settling tank, boiler tank, and booster tank in a fuel oil system. • Remember that the emergency generator must have a reliable, clean, ready‑to‑use fuel supply that does not depend on many other systems first.

💭 Think About

• Starting from the label for the emergency generator supply, where does that pipe lead back to on the tank arrangement at the top of the drawing? • Which one of the listed tanks would reasonably hold clean, ready fuel that can be used immediately by emergency equipment without additional settling, heating, or transfer steps? • Looking at the illustration, which tank is directly associated with supplying diesel to multiple small consumers (SSDGs, EDG, Aux boiler) rather than just serving as a preparation, settling, or heating stage?

✅ Before You Answer

• Verify which tank’s outlet line is directly connected (through the mixing/3‑way valve) to the line going "To SSDGs, EDG and Aux. Boiler". • Confirm which type of tank is normally meant to store clean, ready‑for-use diesel oil (not for settling, not dedicated just to a boiler, not just for boosting). • Make sure you are not choosing a tank whose primary purpose is settling, heating for boilers only, or boosting pressure rather than supplying clean fuel.