11. Materials after cold working are subjected to following process to relieve stresses
12. Argentite is the principal ore or raw material for
13. Melting point of iron is
14. The metallic structure of mild steel is
15. The basic constituents of Hastelloy are
16. The crystal structure of gamma iron is
17. The coke in the charge of blast furnace
18. The crystal of alpha iron is
19. Which of the following alloys does not contain tin?
20. Railway rails are normally made of
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