Which one of the following is the solid carburizing material ?

Which one of the following quenching media is used for hardening H.S.S. tool ?

Which one of the following is the purpose of tempering a hardened steel component ?

The process of increasing carbon percentage on the surface of Low-carbon steel is known as

In a case hardening process, ammonia gas is produced on steel; the process is known as

Which one of the following heat treatment processes produces a scale-free surface on the component ?

Nitriding

The hardness and tensile strength in austenitic stainless steel can be increased by

The heat treatment process used for softening hardened steel is

To reduce internal stresses of a hardened tool, the method of heat treatment generally applied is