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

  • question_answer
    A given steel test specimen is studied under metallurgical microscope, magnification used is 100 X. In that different phases are observed. One of them is \[F{{e}_{3}}C.\] The observed phase \[F{{e}_{3}}C\] is also known as:

    A) Ferrite               

    B) cementite

    C) Austenite                      

    D) martensite

    Correct Answer: B

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