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Environmental Engineering in CE

Environmental Engineering in CE
TLV of mercury in potable (drinking) water is about __________ ppm.

0.001
0.1
5
1

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Environmental Engineering in CE
TLV of NO₂ & NO exposure for the human being is 5 & 25 ppm respectively. Prolonged exposure of human being to NO₂ causes

Skin disorder
Bone disease
Cancer
Bronchitis

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Environmental Engineering in CE
Carbonaceous particles having size less than 1 μm are called

Aerosols
Aggregates
Grit
Smoke

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Environmental Engineering in CE
The main pollutant in waste water discharged from a petroleum refinery is oil (both in free and emulsified form). Free oil is removed by

Aerated lagoons
Trickling filters
Biological oxygen pond
Gravity separator having oil skimming devices

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Environmental Engineering in CE
Presence of bacteria in potable (drinking) water causes

Turbidity
Bad odour
Bad taste & colour
Disease

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Environmental Engineering in CE
Presence of carbon monoxide in atmosphere produced by decomposition of chlorophyl and haemoglobin breakdown of some animals, beyond TLV (>50 ppm)

Inhances the green house effect
Causes increase in sea level
Acts as a green house gas thereby raising earth's temperature
Causes asphyxia

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