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

  • question_answer
                        The mould in shell moulding process is made up of which of the following?

    A) Gypsum + setting agents

    B) Green sand + clay

    C) Sodium silicate + dried sand

    D) dried silica + phenolic resin

    Correct Answer: D

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