🔍 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.