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

  • question_answer
    For obtaining a cup of diameter 25 mm and height 15 mm by drawing the size of the round blank should be approximately:

    A) 42 mm             

    B) 44 mm

    C) 46 mm             

    D) 48 mm

    Correct Answer: C

    Solution :

    \[D=\sqrt{{{d}^{2}}+4dh}\] \[=\sqrt{{{25}^{2}}+4\times 25\times 15}=46\,mm\]


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