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

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

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Engineering Materials
Free carbon in iron makes the metal

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

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