The proportion of lime, silica, alumina and iron oxide in a good Portland cement should be

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Mr. Dubey

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Q. The proportion of lime, silica, alumina and iron oxide in a good Portland cement should be

(A) 63 : 22 : 6 : 3
(B) 62 : 22 : 3 : 6
(C) 22 : 63 : 6 : 3
(D) 22 : 63 : 3 : 6

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✅ Correct Answer: (A) 63 : 22 : 6 : 3

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