🔍 Key Concepts

• Look at the different section lining (hatching) patterns and solid colors to see where one material stops and another begins. • Remember that a weld is usually shown as a separate material from the base metal of the parts being joined. • Each distinct graphical style (plain, hatched, colored) in a section view usually represents a different material.

💭 Think About

• In each of the examples A through E, identify which portions are the same piece and which are separate pieces joined together. • Count how many different kinds of material regions exist in ONE example (do not add A+B+C+D+E together—just one typical arrangement). • Ask yourself: are the shaft, the hub/flange, and the triangular blue areas all the same metal, or is any of them meant to be a separate filler material?

✅ Before You Answer

• Be sure you only count distinct material types, not the number of parts or views. • Confirm whether the blue triangular areas represent weld metal and should be counted as a separate material. • Verify that areas with the same hatching or lack of hatching are treated as the same material, even if they appear in multiple places.