Question

Steel can be hardened quickly by the
process of...........
O Induction hardening
O Nitriding
O Cyaniding
O Carburizing​

Answer 1

Steel can be hardened quickly by using the process of induction hardening.  

What is induction hardening?

• Induction hardening or flames is the process of heating the surface of the steel.
• The surface is heated using high temperatures (applying a high oxy-gas flame, or induction heating).
• It is, then, cooled very quickly by putting water on the surface.

Thus, option A is correct.