For a good quality cement, the ratio of lime to the total of the oxides of Si, Al and Fe should be as close as to (A) 1 (B) 2 (C) 4 (D) 3

Question

For a good quality cement, the ratio of lime to the total of the oxides of Si, Al and Fe should be as close as to

(A) 1
(B) 2
(C) 4
(D) 3

Prashant Kotian · Accepted Answer

Correct answer: B. For a good quality cement, the ratio of silica (SiO2) to alumina (Al2O3) should be between 2.5 and 4 and the ratio of lime (CaO) to the total of the oxides of silicon (SiO2) aluminium (Al2O3) and iron (Fe2O3) should be as close as possible to 2.

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