1.

RPM is only used for castings of which of the following material?(a) Ferrous metals(b) Non-ferrous Metals(c) Plastics(d) SiliconeI had been asked this question during an interview.My question comes from Molding Processes topic in section Mold and Mold Making of Casting-Forming-Welding I

Answer» CORRECT CHOICE is (B) Non-ferrous Metals

The best I can explain: Rubber Plaster Moulding process is used for making MOULD that can only be used for producing non-ferrous CASTINGS like copper and aluminum based alloys.


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