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

Water Treatment Questions and Answers | Latest Version | 2025/2026 | Correct & Verified What is the main purpose of water treatment? To remove contaminants and make water safe for human use. Why is coagulation used in water treatment? To clump together suspended particles for easier removal. What is flocculation in water treatment? The process of gently mixing water to form larger particle clumps. Why is sedimentation important in water treatment? To allow heavy particles to settle out of water naturally. What is the role of a filter in water treatment? To remove remaining suspended particles after sedimentation. 2 Why is chlorination used in water treatment? To disinfect water by killing bacteria and other pathogens. What is the purpose of pH adjustment in water treatment? To control acidity and improve chemical treatment efficiency. Why is water softening necessary? To remove hardness-causing minerals like calcium and magnesium. What is the role of an aerator in water treatment? To increase oxygen levels and remove dissolved gases. Why is fluoride sometimes added to water? To prevent tooth decay in the population. What is the function of activated carbon in water treatment? To remove odors, color, and organic contaminants. 3 Why is turbidity measured in water? To assess the clarity and particle content of the water. What is the main purpose of a sedimentation basin? To provide time for suspended particles to settle. Why is a coagulant such as alum added to water? To destabilize particles and promote floc formation. What is the role of a rapid mix tank? To quickly disperse coagulants throughout the water. Why is chlorine residual monitored in treated water? To ensure sufficient disinfection has been maintained. What is the purpose of backwashing a filter? To clean the filter media and remove trapped particles.