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Railways NTPC (Technical Ability) Metal Forming, Casting and Cutting Question Bank Metal Forming

  • question_answer
    Magnesium is extruded and not rolled because:

    A) It has a low melting point                 

    B) It has a low density                         

    C) Its reactivity with roll material high          

    D) It has a dose-packed hexagonal structure.

    Correct Answer: C

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