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The specific surface of cement should not be lesser than __________

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The specific surface of cement should not be lesser than __________

(a) 550 cm^2/gm

(b) 1250 cm^2/gm

(c) 2250 cm^2/gm

(d) 5250 cm^2/gm

The question was asked during an interview.

Origin of the question is Plain and Reinforced topic in section Miscellaneous Materials, Plain and Reinforced Cement Concrete of Construction & Building Materials

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The correct choice is (c) 2250 cm^2/gm

The best I can explain: The specific surface serves as a measure of the frequency of particles having an average size. The specific surface of cement should not be lesser than 2250 cm^2/gm.

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