If P is the percentage of water required for determination of normal consistency of cement, then percentage of water to be added for determination of initial setting time is

0.70 P

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0.75 P

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0.80 P

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0.85 P

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Solution

The correct option is D 0.85 P
As per IS: 4031 Part 5-1988, initial setting time test on cement is conducted by gauging the cement with 0.85 times the water required to give a paste of standard consistency.

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