Environmental Health — Flashcards

Flashcard 121: 1 mEq of hardness of water= _____ mg of calcium carbonate

Answer: 50

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Flashcard 122: _____ index measures particulate matter in air

Answer: Soiling

Extra: The Soiling Index (also known as the Coefficient of Haze) is an indicator used to measure the density of suspended particulate matter (specifically smoke) in the air. Grit and dust are typically measured using a deposit gauge and expressed by weight, rather than an index.

Flashcard 123: _____ layer is the heart of slow sand filters

Answer: Schmutzdecke

Flashcard 124: _____ reagent is used for chlorine estimation

Answer: orthotolidine

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Flashcard 125: corrected effective air temperature(CET)= effective air temperature(AET) + _____

Answer: radiant heat

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Flashcard 126: 3323f70f79e14b3cbe3e2902781bf872-ao-2

Answer: sand filters

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Flashcard 127: there should be 1 urinal for every _____ students in school

Answer: 60

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Flashcard 128: Ideally, water turbidity should be <_____ NTU

Answer: 1

Extra: Drinking water standards (BIS IS 10500): - Acceptable limit: 1 NTU - Permissible limit: 5 NTU

Flashcard 129: _____ filter is choked most commonly in RO filters

Answer: carbon block

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Flashcard 130: sandbed size is _____ in rapid sand filter

Answer: 1 meter

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