🔍 Key Concepts

• Identify how the bearing housing is constructed and whether there is a visible oil reservoir around the shaft. • Look for any oil rings or mechanical parts that dip into a pool and ride on the shaft versus fittings that would indicate grease or a drip oiler. • Consider what piping or external equipment would be required for a forced-feed pressurized oil system and whether any of that appears in the drawing.

💭 Think About

• Compare the drawing to what each choice would physically look like: Which option would require external lines or pumps, and which would be mostly self-contained in the bearing housing? • Ask yourself: Do you see any grease fittings or packed cavities, or do you instead see a ring or device that could carry oil from a sump up to the shaft and bearings? • If there were a drip oiler cup, where would it be mounted and would it be visible in this sectional view?

✅ Before You Answer

• Verify whether there is a distinct oil sump area in the bearing housing under the shaft. • Check carefully for the presence of a ring encircling the shaft that could rotate and pick up oil from below. • Confirm that there are no external pressure lines or pump symbols that would indicate a forced-feed oil system.