\r\n\r\n\r\n \r\nWhat should be the hardness level of drinking water?\r\n\r\n: (A) Soft water, (B) Moderately hard water, (C) Hard water, (D) Very hard water
Answer is B. Drinking water should be moderately soft. Softening of water is recommended when hardness exceeds 3 meq/ L. Ref: Park 21st edition page: 672.