directions: identify the alphabet on the given machine parts.

Answer:
1. Phantom Line
2. Section Line
3. Cutting Plane Line
4. Leader Line
5. Hidden Line( Thread Sym.)
6. Hidden Line
7. Center Line
8. Extension Line
9. Break Line(Zig Zag)
10. Visible Object Line
11. Break Line (Free Hand)
12. Dimension Line
Explanation: