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Q: What is the maximum percentage of absorption allowed for bricks?
  • A. 90%
  • B. 75%
  • C. 20%
  • D. None of these
Correct Answer: Option C - 20% of its dry weight, water absorption of a burnt clay building brick up to class 12.5 as per IS 1077-1992, is immerged in cold water for a duration of 24 hour. • Water absorption of IInd and IIIrd class brick, when immerged in cold water for duration of 24 hour are 22.5% and 25%.
C. 20% of its dry weight, water absorption of a burnt clay building brick up to class 12.5 as per IS 1077-1992, is immerged in cold water for a duration of 24 hour. • Water absorption of IInd and IIIrd class brick, when immerged in cold water for duration of 24 hour are 22.5% and 25%.

Explanations:

20% of its dry weight, water absorption of a burnt clay building brick up to class 12.5 as per IS 1077-1992, is immerged in cold water for a duration of 24 hour. • Water absorption of IInd and IIIrd class brick, when immerged in cold water for duration of 24 hour are 22.5% and 25%.