Railways Technical Ability Metal Forming, Casting and Cutting Question Bank Metal Forming

  • question_answer In drawing operation if \[{{D}_{i}}=\] initial diameter and \[{{D}_{0}}=\] outgoing diameter, then what is the degree of drawing equal to?

    A) \[\frac{{{D}_{i}}-{{D}_{0}}}{{{D}_{i}}}\]                  

    B) \[\frac{D_{i}^{2}-D_{0}^{2}}{D_{i}^{2}}\]

    C) \[\frac{D_{i}^{2}-D_{0}^{2}}{D_{i}^{2}}\]              

    D) \[\sqrt{\frac{D_{i}^{2}-D_{0}^{2}}{D_{i}^{2}}}\]

    Correct Answer: C


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