Question

1) upon heating, one phase results in another solid phase and a liquid phase during (.........) reaction.\

a) peritectic

b)eutectic

c)peritecid

d)eutectiod

2) when steel with exactly 0.8% of carbon by weight is cooled slowly, the BCC structure of the mixture tries to revert back to its original FCC structure

a) True

B) False

3) the line above which the alloy liquid is called?

a) liquid line

b)tie line

c) solidous line

d) lever line

Answer 1

Ans(1) : (a) Peritectic. This reaction is a type of reaction in which a solid phase and a liquid phase will together form a second solid phase at a given temperature and composition and on heating it will again break into that solid and liquid phase differently.

Ans(2) : The above statement is False as it's opposite takes place and in this condition the FCC structure of the mixture will revert back to its BCC structure.

Ans(3) : (a) The line above which the alloy is being termed as liquid is Liquidus line or we can say Liquid line. So the option a is correct.

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