11.
Materials after cold working are subjected to following process to relieve stresses

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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