Environmental Health — Flashcards

Flashcard 51: chlorine demand is calculated by _____

Answer: horrocks apparatus

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Flashcard 52: house should be _____ meters away from the road

Answer: >15

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Flashcard 53: sanitary well should be within _____ distance from household

Answer: 100 m

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Flashcard 54: 537ad22c5d234041adada02f7b416b76-oa-2

Answer: sanitary latrine excreta disposal method at unsewered areas

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Flashcard 55: Identify the mosquito larva with _____ and a _____ resting position: Anopheles larva

Answer: no siphon tube

Extra: Anopheles larvae are characterized by the absence of a respiratory siphon and a resting position parallel to the water surface (maintained by palmate hairs). Comparison: - Anopheles: No siphon, rests parallel. - Culex: Long siphon, rests at an angle. - Aedes: Short/stout siphon, rests at an angle.

Flashcard 56: _____ air changes/hour are recommended in OPD for a room of 24m3

Answer: 6

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Flashcard 57: The window sill in a school classroom should be _____ above floor level.

Answer: 2.5 feet

Flashcard 58: _____ gas causes lung cancer, while Ozone layer depletion causes skin cancer.

Answer: Radon

Extra: Radon is the second leading cause of lung cancer after smoking. Ozone layer depletion allows more UV-B radiation to reach the earth, increasing the risk of skin cancers (basal and squamous cell carcinomas, melanoma) and cataracts.

Flashcard 59: temperature of incinerators is _____ degree celsius

Answer: 800-1100

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Flashcard 60: The _____ is an instrument used to measure relative humidity.

Answer: Hygrometer