🔍 Key Concepts

• Follow the piping from the raised deck fill connection down to see which tank actually stores the bulk of the clean lube oil. • Distinguish between a sump, a sludge tank, and a storage tank by looking at where oil comes from and where it goes. • Check which labeled tank is connected to the sump warmup line / lube oil heater and transfer pump, indicating a main storage and supply function.

💭 Think About

• Which labeled item is the tank that receives oil from the deck fill line and can supply oil back into the system, rather than just collecting drain‑off or sludge? • Which tank is connected to the oily waste or transfer pump routes, suggesting it holds the main inventory of usable lube oil? • Do any of the other labeled tanks (A, B, C) look more like sumps or overhead/settling tanks based on their vents, level indicators, and connections to drains and returns?

✅ Before You Answer

• Verify that the deck fill line terminates at the correct tank before choosing your answer. • Confirm that the tank you pick is not only connected to drains or sludge lines, but can also feed oil back to the system. • Make sure the selected label is on a large, low‑level tank consistent with long‑term storage, rather than a small service or overhead tank.