1.

Which among the following is not a cast iron?(a) White iron(b) Compacted graphite iron(c) Gray cast iron(d) Pig iron

Answer» Right option is (d) Pig iron

The best explanation: Among the following, white iron, compacted cast iron and gray cast iron are different types of cast irons, but pig iron is not. It is from pig iron, that cast irons are made, by re-melting them.


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