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Environmental Engineering in CE

Environmental Engineering in CE
Waste/polluted water discharged from electroplating, blast furnace and coal mining industries contain mainly __________ substances.

Inorganic
Organic
Radioactive
None of these

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Environmental Engineering in CE
Particulates (< 1μm size) remaining suspended in air indefinitely and transported by wind currents are called

Aerosols
Smoke
Mists
Fumes

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Environmental Engineering in CE
Tri-sodium phosphate is used in boiler water treatment to reduce

Turbidity
Dissolved oxygen
Suspended silica
Caustic embrittlement

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Environmental Engineering in CE
Most of the atmospheric air pollutants are present in large quantity in

Mesosphere
Thermosphere
Stratosphere
Trophosphere

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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)

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

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Environmental Engineering in CE
Which of the following causes death by asphyxiation, if its presence in atmospheric air exceeds maximum allowable concentration (i.e. > 50 ppm)?

Peroxyacyl nitrate
Benzopyrene
Sulphur dioxide
Carbon monoxide

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