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Environmental Engineering in CE

Environmental Engineering in CE
Which of the following is not a weightless pollutant?

Radioactive rays
SPM
Noise pollution
Thermal pollution

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Environmental Engineering in CE
Higher concentration of nitrogen dioxide in atmospheric air causes

Cancer
Corrosion
Asphyxiation
Bronchitis

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Environmental Engineering in CE
Removal of __________ is accomplished by aeration of water.

Dissolved solids
None of these
Dissolved gases
Suspended solids

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Environmental Engineering in CE
TLV of ammonia, nitrogen dioxide and phenol vapor in air is __________ ppm.

5
1000
100
2000

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Environmental Engineering in CE
The major reason of hydrodynamic noise (i.e., noise resulting from liquid flow) is

Fluctuation in liquid flow
Pipe vibrations
Boundary layer separation
Cavitation

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Environmental Engineering in CE
Direct reaction of unsaturated hydrocarbons with either NO or NO₂ produces an eye irritating pollutant compound known as

Poly acrylonitrile
Photochemical smog
Peroxy acetyl nitrate (PAN) or methyl nitrile
Benzopyrene

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