Environmental Health — Flashcards

Flashcard 151: disadvantage of deep well is _____

Answer: hard water

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Flashcard 152: DDT has a residual effect of _____

Answer: 10-12 weeks

Extra: DDT (50% WP) is used for Indoor Residual Spray (IRS) at a dose of 1 g/m². According to NVBDCP guidelines, its residual effect lasts for 10-12 weeks (Park mentions 6-10 weeks).

Flashcard 153: Effective size of sand in **rapid sand filter** is _____ mm and in **slow sand filter** is _____ mm

Answer: 0.4-0.7

Flashcard 154: height of a house window should be _____ from the ground

Answer: <3 feet

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Flashcard 155: 568ee3640c184fbaa2379da689136973-ao-1

Answer: trench method of solid waste disposal

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Flashcard 156: incinerator decreases the volume of waste by _____ %

Answer: 80-95

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Flashcard 157: instrument:_____ Use:_____

Answer: anemometer

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Flashcard 158: _____ is segregated into the yellow category of BMW

Answer: Human anatomical waste

Flashcard 159: f88ddafee050488590dfb35b04ed01d4-ao-6

Answer: safe water qualities

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Flashcard 160: _____ air changes/hour are required for healthy living

Answer: 2-3

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