🔍 Key Concepts

• Study the small detail view showing items #11 and #12 and trace where any piping or passages lead in relation to the bearing surfaces. • Recall how large thrust bearings / line shaft bearings on main propulsion shafts are usually lubricated (gravity-feed or low‑pressure circulating oil vs. special high‑pressure systems). • Consider whether special synthetic oils or extremely high‑pressure systems are normally required for this type of marine shaft bearing.

💭 Think About

• From the illustration, does item #11 look like an oil supply arrangement feeding the working faces, or something else? What does #12 appear to represent? • If this device were using an extremely high‑pressure hydrostatic system, what extra components (pumps, accumulators, piping) would you expect to see sketched, and do you see them here? • Think about whether the thrust/line shaft bearing for a slow‑speed diesel is usually tied into the main engine sump and lube system, or completely separate with exotic lubricants.

✅ Before You Answer

• Verify which parts of the bearing are clearly in contact with oil and whether there is an obvious inlet path and drain path for lube oil. • Check whether the drawing or choices mention any special oil type requirement and ask yourself if that matches standard marine practice for these bearings. • Compare the arrangement to a normal line shaft bearing lubrication diagram in your notes and decide if this looks essentially the same or something fundamentally different.