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Which of the following is a principle binder used in carbon dioxide moulding?

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Which of the following is a principle binder used in carbon dioxide moulding?

(a) Carbon

(b) Carbon Dioxide

(c) Sodium

(d) Sodium silicate

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Asked question is from Molding Processes topic in division Mold and Mold Making of Casting-Forming-Welding I

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The correct choice is (d) Sodium silicate

The best explanation: Sodium silicate is the principle binder used in carbon dioxide moulding process. The mixture of sodium silicate and sand is treated with carbon dioxide to form a bond.

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