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The ratio of the percentage of alumina to that of oxide of iron in the cement should not be less than ________

The ratio of the percentage of alumina to that of oxide of iron in the cement should not be less than ________ Correct Answer 0.66

The ratio of the percentage of alumina to that of oxide of iron in the cement should not be less than 0.66. However, the ratio of the percentage of lime to those of iron oxide, alumina and silica should not be greater than 1.02.

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