A 1st class brick immersed in water for 24 hours, should not absorb water (by weight) more than
A. 10%
B. 15%
C. 20%
D. 25%
Answer: Option C
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First class brick water absorb maximum =20%
2nd class brick maximum absorb =23%
3rd class crick=25%
For 1st Class Brick, it is limited to 15%. Pls recheck examveda.
1st class< 20%
2nd class