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Which of the following cores are produced by mixing silica?(a) Green sand cores(b) Dry sand cores(c) Oil bonded cores(d) Resin bonded coresI had been asked this question in a national level competition.This interesting question is from Types of Cores topic in division Core and Core Making of Casting-Forming-Welding I

Answer»

Right CHOICE is (C) Oil bonded cores

Explanation: Oil bonded cores are produced by adding SILICA and a small AMOUNT of LINSEED oil, and then polymerized.



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