🔍 Key Concepts

• Identify which component remains fixed and supports or houses the other seal/coupling parts — this is often called the base ring. • Compare the stationary view and rotating view to see which labeled part serves as the main support for the flexible/working elements. • Notice which letter points to the ring that forms the primary seating surface or support for the other rings and plates.

💭 Think About

• In the stationary view, which labeled ring do all the moving or flexible elements appear to be mounted against or supported by? • Looking at the rotating view, which labeled part clearly rotates with the shaft, and which part stays as the underlying support? The base ring will be the supporting one, not the flexible element itself. • Among A, B, C, and D, which label is attached to a solid, continuous ring rather than to multiple thin or toothed elements? That solid support is most likely the base ring.

✅ Before You Answer

• Be sure you distinguish between flexible/laminated rings and the solid supporting ring behind them. • Verify in both views that the part you pick actually serves as the foundation for the stack of plates/rings, not just one of the plates itself. • Confirm that the letter you choose marks a single solid ring that encircles the shaft and does not appear as multiple separate segments.