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

  • question_answer
    Which of the following is a point imperfection
    1. Vacancy
    2. Interstitially
    3. Frenkel imperfection
    4. Schottky imperfection

    A) 1 and 2 only                 

    B) 2 and 3 only

    C) 2, 3 and 4 only  

    D) 1, 2, 3 and 4

    Correct Answer: D

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