Environmental Health — Flashcards

Flashcard 41: Effective size of sand is _____ in slow sand filters

Answer: 0.2-0.3 mm

Flashcard 42: impounding reservoir is an example of _____ water source

Answer: surface

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Flashcard 43: f88ddafee050488590dfb35b04ed01d4-ao-5

Answer: safe water qualities

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Flashcard 44: 3323f70f79e14b3cbe3e2902781bf872-ao-5

Answer: sand filters

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Flashcard 45: non organic waste is called _____

Answer: rubbish

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Flashcard 46: f88ddafee050488590dfb35b04ed01d4-ao-1

Answer: safe water qualities

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Flashcard 47: _____ is the form of chlorine most commonly used for water chlorination

Answer: Chlorine gas

Extra: Chlorine gas is the most common form used for large-scale municipal water treatment. Bleaching powder (calcium hypochlorite) is typically used for smaller scales such as wells.

Flashcard 48: area of a room in a house should be >_____ per person

Answer: 100 sq feet

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Flashcard 49: water can be defluoridated by _____ technique

Answer: nalgonda

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Flashcard 50: _____ is the indicator for recent contamination of water

Answer: Faecal streptococci