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Which of the following is a perfect composition of clay (Bentonite) used in moulding sand?(a) Al2O3(b) Al2O3.2SiO2(c) Al2O3.2H2O(d) Al2O3.2SiO2.2H2OI had been asked this question in an interview for job.Asked question is from Mold Materials topic in section Molding and Core Sands of Casting-Forming-Welding I

Answer»

Correct CHOICE is (d) Al2O3.2SiO2.2H2O

For EXPLANATION: Bentonite is one type of clay used in moulding sand as a BINDER. Its CHEMICAL formula is represented as Al2O3.2SiO2.2H2O.



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