9. What are the different ways of ensuring that only clean metal enters the casting cavity? I 10. A vertical gating system has a sprue height of 250 mm, one ingate located 150 mm below the mould top...

Q no:10

Extracted text: 9. What are the different ways of ensuring that only clean metal enters the casting cavity? I 10. A vertical gating system has a sprue height of 250 mm, one ingate located 150 mm below the mould top and the second ingate 200 mm below mould top. What should be the ratio of cross-sections of the two ingates to ensure equal flow rate from both. 11. What are the different ways of controlling the ingate velocity?