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

  • question_answer A gating ratio of 1 : 2 : 4 is used to design the gating system for magnesium alloy casting. This gating ratio refers to the cross-section areas of the various gating elements as given below:
    1. Down sprue               
    2. Runner bar
    3. Ingates
    The correct sequence of the above elements in the ratio 1 : 2 : 4 is:

    A) 1, 2 and 3                     

    B) 1, 3 and 2

    C) 2, 3 and 1                     

    D) 3, 1 and 2

    Correct Answer: A


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