WHICH_OF_THE_FOLLOWING_CAST_IRONS_CANNOT_BE_MACHINED??$

1.	WHICH_OF_THE_FOLLOWING_CAST_IRONS_CANNOT_BE_MACHINED??$
A.	White cast iron
B.	Grey cast iron
C.	Malleable cast iron
D.	Spheroidal graphite cast iron
Answer» B. Grey cast iron

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