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Which of the following is not used as an additive?(a) Dextrin(b) Coal dust(c) Pitch(d) ZincI had been asked this question by my school principal while I was bunking the class.I want to ask this question from Mold Materials topic in portion Molding and Core Sands of Casting-Forming-Welding I |
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Answer» The CORRECT choice is (d) ZINC |
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