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

  • question_answer
    Consider the following ingredients used in moulding:
    1. Dry silica sand                       
    2. Clay
    3. Phenol formaldehyde              
    4. Sodium silicate
    Those used for shell mould casting include:

    A) 1, 2 and 4                     

    B) 2, 3 and 4

    C) 1 and 3            

    D) 1, 2, 3 and 4

    Correct Answer: C

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