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Which of the following sand is freely available?(a) Silica sand(b) Zircon(c) Olivine(d) DolomiteI have been asked this question in an international level competition.My doubt stems from Refractory Sands in section Molding and Core Sands of Casting-Forming-Welding I

Answer»

Right choice is (a) Silica sand

To explain I would SAY: Silica sand has this as ONE of its advantages, that it is AVAILABLE without any DIFFICULTY in abundance. Hence, the COST of silica sand is also low.



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