Question: choose the correct answer and justify in details your answer A water treatment plant has a flow rate of 0.6m3/s. The settling basin at the

choose the correct answer and justify in details your answer

A water treatment plant has a flow rate of 0.6m3/s. The settling basin at the plant has effective settling volume dimensions of length 20m, depth 3m, and width 6m. What percentage of the particles having a settling velocity of 0.004m/sec is removed? 1. 80% 2. 92% 3. 75% 4. 100% Dosage of coagulants do not depend on the which of the following factor? 1. Turbidity of water 2. Temperature of water 3. Time of settlement 4. Viscosity of water Dosage of coagulants do not depend on the which of the following factor? 1. Turbidity of water 2. Temperature of water 3. Time of settlement 4. Viscosity of water xv Which of the following is not a water borne disease? 1. Typhoid fever 2. Dysenteries 3. Cholera

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