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It is always desirable to have a large volume of molten metal in the riser to make casting products.

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in Casting-Forming-Welding I by (687k points)
It is always desirable to have a large volume of molten metal in the riser to make casting products.

(a) True

(b) False

I 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

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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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