Q. Slow and uniform cooling of hot iron in its metallurgy is known as :
Answer: annealing
Notes: The process of slow and uniform cooling of hot metals in metallurgy is known as annealing. It is a heat process whereby a metal is heated to a specific temperature /colour and then allowed to cool slowly. This softens the metal which means it can be cut and shaped more easily. Using annealing, mild steel is heated to a red heat and allowed to cool slowly.