11.
In grey cast iron, carbon is present in the form of

12.
In malleable iron, carbon is present in the form of

13.
Nodular iron has

14.
Nickel in steel

15.
Dislocations in materials refer to the following type of defect

16.
The main alloying elements high speed steel in order of increasing proportion are

17.
Induction hardening is basically a

18.
Which of the following is not the correct method of increasing fatigue limit?

19.
The property of a material which enables it to retain the deformation permanently, is called

20.
The brown smoke during the operation of a Bessemer converter indicates that the

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