🔍 Key Concepts

• Stripping vs. service suction lines in a lube oil sump diagram • How the sludge tank / oily waste system is connected to the main lube oil sump • Diagram symbols that indicate a manual (hand‑operated) pump or stripping connection versus a normal running pump

💭 Think About

• For each label G, M, N, and D, trace the piping: which one is actually connected to the very bottom of the main lube oil sump and then leads toward the sludge or waste‑oil system? • Which labeled item appears to be used only occasionally (for cleaning or transfer) rather than continuously in normal lube oil circulation to the turbines and bearings? • Does the symbol at any label show a manual or special stripping function (for example, a separate small pump or line going directly to the sludge tank), and how does that compare with the others?

✅ Before You Answer

• Identify which label is on the main service pump discharge or filters; those are NOT for stripping sludge before tank entry. • Confirm which labeled point is tied to the sludge tank / oily waste transfer side rather than returning oil to the system or bearings. • Verify that the chosen label is associated with a dedicated stripping/transfer line from the sump bottom and is not part of the normal operating lube oil circulation.