1. Civil Engineering
  2. Environmental Engineering
  3. The permissible hardness of water for pu...
Q.

The permissible hardness of water for public supplies is

A. 400 mg/litre
B. 10 mg/litre
C. 25 mg/litre
D. 75 mg/litre
E. 115 mg/litre
Answer» E. 115 mg/litre
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