1.

It is always desirable to have a large volume of molten metal in the riser to make casting products.(a) True(b) FalseI had been asked this question during an interview.This question is from Riser Placement topic in portion Cooling and Solidification of Casting-Forming-Welding I

Answer»

Correct choice is (b) False

The best I can explain: The riser basically REPRESENTS waste metal that is to be separated from the casted part and re-melted to make other CASTINGS. It is always desirable to have a minimum volume of molten metal in the riser to make EFFICIENT production of castings. This increases the CASTING yield which SAVES metal and reduces the time of production too.



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