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Environmental Engineering in CE

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

Thermosphere
Trophosphere
Stratosphere
Mesosphere

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Environmental Engineering in CE
Presence of __________ in water stream are deleterious to aquatic life.

All of these
Suspended solids
Heavy metals and cynides
Soluble and toxic organics

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Environmental Engineering in CE
BOD of raw municipal sewage may be in the range of about __________ mg/litre.

5-10
1-2
150-300
2000-3000

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Environmental Engineering in CE
Which of the following fine dust removal equipments is the most efficient?

Bag filter
Cyclone separator
Electrostatic precipitator
Scrubber

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Environmental Engineering in CE
Siderosis is a disease caused by the inhalation of __________ dust.

Iron
None of these
Silica
Coal

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Environmental Engineering in CE
As per the world health organisation (WHO) specification, the maximum permissible concentration (i.e., TLV) of particulate matter in air is __________ μg/m³.(μg-microgram)

800
750
90
10

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