Q. ______ decreases the rate of setting of cement.
A) Silica
B) Alumina
C) Magnesium oxide
D) Gypsum
✔ Correct Answer: Gypsum
Exam Insight
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A) Silica
B) Alumina
C) Magnesium oxide
D) Gypsum
✔ Correct Answer: Gypsum
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