Question

Annealing of steel is the process of heating steel :

• A. to a bright red hot and then cooling it slowly
• B. to a bright red hot and then cooling it suddenly
• C. to a temperature much below redness and cooling it slowly
• D. None of these

Answer 1

The correct option is A to a bright red hot and then cooling it slowly

Annealing is one of the heat treatment process in which the metal is heated below its melting point and then cooled slowly.
Annealing of steel is the process of heating steel to a bright red hot and then cooling it slowly.
It develops certain special properties like hardness, strength, ductility etc. without changing the chemical composition.
It also removes some undesirable properties or gases like entrapped gases, internal stresses, and strains.

Option A is correct.