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A permeability of a core should be _________(a) Low(b) Moderate(c) High(d) Has no effect on castingThe question was asked in exam.My question is taken from Different Functions of Core topic in portion Core and Core Making of Casting-Forming-Welding I

Answer»

Right choice is (c) High

To explain I would say: The permeability of the material should be high so as to EASE the flow of fluids through it during solidification, MAY work as gas exchanger or water ABSORBER.



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