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What is the softening point of western montmorillonite?(a) 800°F – 1150°F(b) 1200°F – 1650°F(c) 1750°F – 2100°F(d) 2100°F – 2450°FThis question was addressed to me in semester exam.This intriguing question comes from Molding Sands Binders in chapter Molding and Core Sands of Casting-Forming-Welding I

Answer»

The correct answer is (d) 2100°F – 2450°F

Explanation: Bentonite is classified into 2 types, namely, Sodium MONTMORILLONITE and Calcium montmorillonite. WESTERN bentonite also CALLED as Sodium montmorillonite is KNOWN to have its softening POINT in the range of 2100°F – 2450°F.



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