Which variety of cast iron is obtained by melting cast iron with wrought iron scrap?

Dolerite is an example of ____ rock.

Aston’s process is used to manufacture _____

In which type of casting, the outer surface is made hard while the inner surface remains relatively soft?

Which of the following is not a classification of rocks from which building stones are obtained?

Which of the following is the red oxide of iron?

Which of the following is not a physical classification of rocks?

Dolomite is a bicarbonate of _____ and _______