Engineering Materials
Which of the following represents the allotropic forms of iron?

Alpha iron, gamma from and delta iron
Body centered cubic iron and face centered cubic iron
Alpha iron, beta iron and gamma iron
Alpha iron and beta iron

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Engineering Materials
Free carbon in iron makes the metal

Soft and gives a fine grained crystalline structure
Soft and gives a coarse grained crystalline structure
Hard and gives a fine grained crystalline structure
Hard and gives a coarse grained crystalline structure

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