A schematic diagram of the poring basin and the sprue of a gating syst – McqOptions

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1.	A schematic diagram of the poring basin and the sprue of a gating system is shown in the figure. The depth of molten metal in the pouring basin is 100 mm and the height of the sprue is 1,500 mm.Considering the cross-section of the sprue is circular, the ratio d1 : d2 to avoid aspiration is
A.	3 : 2
B.	5 : 6
C.	15 : 16
D.	1 : 2
Answer» E.

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