NCCER Level 4 Module 1: Water Treatment Questions and Answers | Latest Version | 2024/2025 | Correct & Verified

NCCER Level 4 Module 1: Water Treatment Questions and Answers | Latest Version | 2024/2025 | Correct & Verified What is the primary purpose of water treatment? To remove contaminants and make water safe for drinking, industrial use, or discharge into the environment. Why is sedimentation used in water treatment? Sedimentation allows heavier particles to settle at the bottom, making the water clearer. What is the role of chlorine in water treatment? Chlorine is used to disinfect water and kill harmful bacteria and viruses. Why is pH adjustment important in water treatment? To balance the water’s acidity or alkalinity, ensuring it is safe for use and preventing pipe corrosion. 2 What is a common method to remove large debris from water? Screening is used to filter out large debris like leaves, branches, and trash. What is reverse osmosis in water treatment? Reverse osmosis uses a semi-permeable membrane to remove dissolved salts, impurities, and contaminants. What does coagulation achieve in the treatment process? Coagulation gathers small particles into larger clumps, making them easier to remove in subsequent steps. Why is aeration used in water treatment? Aeration adds oxygen to water, reducing odors, improving taste, and removing gases like carbon dioxide. What is the purpose of activated carbon in water treatment? Activated carbon removes organic contaminants, chlorine, and odors by adsorption. 3 What is the significance of turbidity in water treatment? Turbidity measures the cloudiness of water and indicates the presence of suspended particles. How is hardness removed from water? Hardness is removed by processes like ion exchange or the use of water softeners. What is the role of filtration in water treatment? Filtration removes suspended particles by passing water through materials like sand, gravel, or membranes. What is a common indicator of biological contamination in water? The presence of coliform bacteria often indicates biological contamination. Why are sedimentation tanks used in water treatment plants? They provide a space for solids to settle out of the water by gravity. What does a flocculant do in water treatment? A flocculant helps gather small particles into larger flocs for easier removal. 4 Why is fluoride added to drinking water in some treatment systems? Fluoride is added to help prevent tooth decay in communities. What is the purpose of ultraviolet (UV) disinfection? UV disinfection uses light to kill or inactivate bacteria, viruses, and other pathogens. How does a water softener work? A water softener exchanges calcium and magnesium ions with sodium or potassium ions to reduce hardness. What is sludge in the context of water treatment? Sludge is the semi-solid material left after the removal of impurities during water treatment. Why is continuous monitoring important in water treatment systems? Continuous monitoring ensures water quality standards are met and helps detect issues quickly. 5 What is the purpose of a distribution system in water treatment? To deliver treated water from the plant to homes, businesses, and other facilities. What is the function of a settling basin? A settling basin allows particles to settle out of water during the treatment process. Why is water pre-treatment important? Pre-treatment removes large contaminants and prepares water for more detailed treatment processes. What is the purpose of desalination in water treatment? Desalination removes salt and minerals from seawater or brackish water to make it potable. Why are chemicals added during the coagulation