Question 221General Subjects - Assistant Engineer

70% to pass

When a metal is undergoing heat treatment for the purposes of annealing, besides refining the grain structure, what is the determining characteristic of the metal?

AChange in chemical composition
BSoftened condition
CHigh tensile strength
DInduction of toughness
AI Explanation

The correct answer is B) Softened condition. During the annealing process, the primary goal is to soften the metal by relieving internal stresses and refining the grain structure. Annealing involves heating the metal to a specific temperature, holding it at that temperature for a certain duration, and then slowly cooling it. This process reduces the hardness and increases the ductility of the metal, resulting in a softened condition. The change in chemical composition, tensile strength, or toughness are not the determining characteristics of the annealing process. The other answer choices are incorrect because: A) Change in chemical composition is not the goal of annealing; the chemical composition remains the same. C) High tensile strength is not the desired outcome of annealing; the process aims to soften the metal. D) Induction of toughness is not the primary purpose of annealing; the focus is on softening the metal.

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