🔍 Key Concepts

• Trace the lube oil flow path through and around the cooler on SE-0011 • Identify where the temperature-sensing element is located relative to the lube oil cooler outlet • Distinguish between controlling sea water flow and lube oil flow for temperature regulation

💭 Think About

• Follow the lube oil line from the pump discharge toward the bearings and note any branch that bypasses the cooler—what valve symbol controls that split? • Look for a temperature bulb or thermostatic symbol: is it sensing sea water temperature or lube oil temperature, and is it upstream or downstream of the cooler? • Ask yourself: in a steady‑flow turbine lube system, which is more precise and common—modulating sea water through the cooler, or diverting some of the lube oil around it?

✅ Before You Answer

• Verify whether the thermostatic element is in the lube oil line or the sea water line • Confirm if there is a bypass line around the lube oil cooler that rejoins the main lube oil header • Check if pump speed is shown as fixed or variable anywhere in the lube oil pump symbol legend