Water Treatment Questions and Answers | Latest Version | 2025/2026 | Correct & Verified

Water Treatment Questions and Answers | Latest Version | 2025/2026 | Correct & Verified What is turbidity, and why is it measured? Turbidity is the cloudiness of water caused by suspended particles, and it indicates water clarity. What is the purpose of adding fluoride to drinking water? To help prevent tooth decay. Why is aeration used in water treatment? To remove dissolved gases and oxidize iron and manganese. What is the role of a chemical feed system? To accurately dose chemicals into the water for treatment. Why must water filters be backwashed regularly? To remove trapped particles and maintain filter efficiency. 2 What does residual chlorine indicate in treated water? It shows that disinfection levels are sufficient in the distribution system. Why is coagulation important in water treatment? It helps small particles clump together for easier removal. What is the purpose of flocculation in water treatment? To gently mix water to form larger flocs from coagulated particles. Why is sedimentation a critical step in water treatment? It allows heavy particles to settle and be removed by gravity. What is the function of a filtration system in water treatment? To remove remaining suspended particles and microorganisms. Why is chlorine commonly added to water? To disinfect and kill harmful pathogens. 3 Why is monitoring pH important in water treatment? Because it affects chemical reactions, corrosion control, and disinfection efficiency. What is water hardness, and why is it controlled? Hardness is caused by calcium and magnesium ions, and it is controlled to prevent scaling. What is the purpose of activated carbon in water