Environmental Health — Flashcards

Flashcard 21: _____ is an instrument used to measure relative humidity.

Answer: Sling psychrometer

Flashcard 22: _____ is the general microbiological indicator of water

Answer: E.coli

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Flashcard 23: upper permissible limit for color of water is _____ TCU

Answer: 15

Extra: According to IS 10500 standards for drinking water: - Acceptable limit: 5 TCU - Permissible limit (in absence of alternate source): 15 TCU

Flashcard 24: disinfectant is put for _____ time in blood spill covered with paper

Answer: 20 mins

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Flashcard 25: insecticide dust is useful for _____ mosquito

Answer: anopheles

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Flashcard 26: hot air leads to _____ in relative humidity

Answer: decrease

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Flashcard 27: 609e056481f64927865c5657f343b82c-ao-2

Answer: septic tank excreta disposal method at unsewered areas

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Flashcard 28: mc route of lead toxicity is _____

Answer: inhalation

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Flashcard 29: _____ is the MC used insect repellent

Answer: DEET

Extra: DEET is a repellent, meaning it discourages insects from landing or climbing on the surface, rather than killing them (insecticide).

Flashcard 30: _____ are the biological indicators for air pollution

Answer: Lichens

Extra: Lichens are particularly sensitive to sulfur dioxide (SO2). Their disappearance from an area (forming "lichen deserts") is a key indicator of air pollution.