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Environmental Engineering in CE

Environmental Engineering in CE
A shallow pond in which the sewage is retained and biologically treated is called

Skimming tank
Imhoff tank
Oxidation
Lagoon

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Environmental Engineering in CE
Which of the following is the most active zone of atmosphere in which weathering events like rain, storm & lightning occur?

Stratosphere
None of these
Thermosphere
Troposphere

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Environmental Engineering in CE
Fresh domestic sewage is __________ in color.

Red
Black
Grey
Dark brown

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Environmental Engineering in CE
Main pollutant present in automobile exhaust is

CO
Hydrocarbons
NO
CO₂

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Environmental Engineering in CE
Particles having diameter greater than 75 μm (micrometer = 10-6 mm) are called

Dust
Powder
Smoke
Grit

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Environmental Engineering in CE
Noise level heard inside a bus in busy city traffic or inside a sub-way train corresponds to about __________ decibels.

95
120
140
75

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