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A. Is applied to the walls of the investment to produce hygroscopic expansion
B. Increase the strength and the setting expansion of the phosphate-bonded investment
C. Acts as a retarder in the silica bonded investments
D. Acts as a refractory in the Silica bonded investments

Correct Answer: Increase the strength and the setting expansion of the phosphate-bonded investment

Last Updated: February 07, 2020