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Railways NTPC (Technical Ability) Materials Science Question Bank Materials Science

  • question_answer
    Heating the hypo-eutectoid steels to \[30{}^\circ C\] above the upper critical temperature line, soaking at the temperature and then cooling slowly to room temperature to form a pearlite and ferrite structure, is known as;

    A) Hardening                     

    B) Normalizing

    C) Tempering                     

    D) Annealing

    Correct Answer: D

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