🔍 Key Concepts

• Study how the part labeled F is shaped and how it fits between the two major metal pieces in the cross‑section. • Think about the difference between a gasket (for sealing) and a pin/dowel (for alignment and positioning). • Recall that a dowel or guide pin is usually used to precisely locate one component relative to another in machinery like a purifier bowl.

💭 Think About

• Is the part at F providing a soft seal against leakage, or is it a rigid piece that aligns two components so they always return to the same position? • Compare the size and orientation of F with nearby fasteners and seals in the drawing—does it look more like a ring, a pin, or a gasket? • Which of the choices would most logically be used to ensure the upper bowl section goes back together in exactly the same orientation each time it is assembled?

✅ Before You Answer

• Verify whether F appears as a solid cylindrical piece crossing the joint between two components (typical of a locating or guide pin). • Check if there is a separate gasket-shaped ring drawn anywhere near F and make sure you do not confuse that with the item in question. • Confirm in your mind the primary function of each option: sealing vs guiding vs accurately locating before selecting your answer.