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CSS Solved Papers
Physics Chemistry

Engineering :: Concrete Technology

  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

Answer: Option A
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