What is the main purpose of treating sewage before it is discharged into the environment?
Correct answer: A. To remove organic matter and disease-causing organisms
- A. To remove organic matter and disease-causing organisms
- B. To increase the amount of dissolved oxygen demand
- C. To add nutrients for aquatic plant growth
- D. To make sewage suitable for direct household use
Explanation
Sewage treatment reduces organic matter, suspended solids and pathogens before discharge. Increasing oxygen demand worsens water pollution, and treated sewage is not automatically safe for direct household use.
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About Environmental Health and Sanitation
Environmental health examines how water, air, food, housing, waste, noise, chemicals and workplace conditions affect disease and well-being. Sanitation content includes safe water treatment and storage, sewage and solid-waste disposal, food hygiene, vector control and the distinction between personal cleanliness and broader public-health sanitation.
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50 free Environmental Health and Sanitation MCQs from Community Health Nursing, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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