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The percentage absorption by weight of a good stone, after how many hours should not exceed .6?

a) 6 hrs
b) 12 hrs
c) 48 hrs
d) 24 hrs

Answer: d
Explanation: As per IS standards, 24 hrs is the time a stone has to be immersed in water to check for water absorption. Time less or more than this would not result in providing the appropriate data.

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