Environmental Health — Flashcards

Flashcard 71: 609e056481f64927865c5657f343b82c-ao-4

Answer: septic tank excreta disposal method at unsewered areas

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Flashcard 72: Incineration reduces the weight of waste by _____%

Answer: 75-80

Extra: Incineration reduces volume by ~90% and weight by 75-80%. The residual ash is approximately 20-25% of the original weight.

Flashcard 73: per child sitting area should not be <_____

Answer: 10 sq. feet

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Flashcard 74: _____ are segregated into the Yellow category (e) of BMW

Answer: Discarded containers of chemicals and disinfectants

Flashcard 75: chlorine level in a water tanker should be _____ ppm

Answer: 2-3

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Flashcard 76: In **slow sand filters**, the thickness of the sand bed is approximately _____

Answer: 1 meter

Extra: **Sand Bed Thickness Comparison:** * **Slow Sand Filter (SSF):** ~1 meter * **Rapid Sand Filter (RSF):** 0.4–0.7 meters **Other dimensions for Slow Sand Filter:** * Supernatant water depth: 1–1.5 meters * Support gravel depth: 0.3 meters

Flashcard 77: AQI of <_____ means good air quality

Answer: 50

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Flashcard 78: Turbidity of water is measured in _____ units

Answer: nephelometric

Flashcard 79: sewage is _____

Answer: liquid waste with faecal matter 

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Flashcard 80: cool air leads to _____ in relative humidity

Answer: increase

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