Which feature makes a household grease trap useful in sanitation?
Correct answer: A. It removes oils and fats before wastewater enters drains
- A. It removes oils and fats before wastewater enters drains
- B. It sterilises sewage before it reaches a drain
- C. It converts drinking water into wastewater
- D. It increases the flow of solid refuse through pipes
Explanation
A grease trap collects fats, oils and grease before they enter drainage pipes, helping prevent blockage and foul odours. It is not a substitute for sewage disinfection or drinking-water treatment.
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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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