Which of the following is the lowest part of the blast furnace?

Which of the following is the black oxide of iron?

Smith’s test is used to find out ________

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

____________ is the process of taking out stones from natural rock beds.

Commonly used fluxing material used in the process of smelting is _______

Pyrite is an oxide of iron.

Which tool is used to make blast holes in the process of blasting?