Q.65. A 200 mm long down sprue has an area of cross – section of 650 where the pouring basin meets the down sprue (i.e. at the beginning of the down sprue). A constant head of molten metal is maintained by the pouring basin. The molten metal flow rate is 6.5 × /s. Considering the end of down sprue to be open to atmosphere and an acceleration due to gravity of mm/, the area of the down sprue in at its end (avoiding aspiration effect) should be
(A) 650.0
(B) 350.0
(C) 290.7
(D) 190.0
Answer: (A)
Explanation:
