Environmental Health — Flashcards

Flashcard 91: heat production in composting is _____ degree celsius

Answer: >60

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Flashcard 92: _____ enzyme test results in  negative  after pasteurisation of milk

Answer: phosphatase

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Flashcard 93: _____ air changes/hour are recommended in high risk areas for a room of 24m3

Answer: 12

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Flashcard 94: _____ days is the optimum time for water storage

Answer: 10-14

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Flashcard 95: f88ddafee050488590dfb35b04ed01d4-ao-2

Answer: safe water qualities mg/l = ppm

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Flashcard 96: Daylight factor (DF) formula is:

Answer: (Illuminance inside / Illuminance outside) × 100

Extra: The daylight factor is the ratio of the light level inside a structure to the light level outside the structure. It is expressed as a percentage.

Flashcard 97: SO2 is an indicator for _____

Answer: industrial air pollution

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Flashcard 98: horrocks apparatus contains _____ cups

Answer: 6

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Flashcard 99: AQI is _____ in severe air pollution

Answer: 401-500

Flashcard 100: Airborne particle (droplet nuclei) size is _____

Answer: < 5 microns

Extra: Droplet nuclei (airborne transmission) are typically < 5 microns in size and can remain suspended in the air for long periods. Particles > 5 microns are considered droplets (droplet transmission). In environmental health, PM10 refers to particles < 10 microns which are inhalable.