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Environmental Engineering in CE

Environmental Engineering in CE
Presence of volatile compounds like gasoline, oil, alcohol, ether etc. in municipal sewers may cause

Corrosion
Undesirable plant growth
Explosion
Non biodegradable foam

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Environmental Engineering in CE
A 'body' which allows the short wavelength incoming solar radiation to enter in, but does not allow long wave length outgoing infra red radiation to escape out is called the

Green house
Global warming
Ionosphere
Atmospheric effect

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Environmental Engineering in CE
The most commonly used chemical coagulant in water treatment is

Hydrazine
Lime
Ferrous sulphate
Alum

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Environmental Engineering in CE
Which of the following is the common pollutant emitted from metallurgical smelters, thermal power plant and cement plants?

Hg
F
NOx
SO₂

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Environmental Engineering in CE
Presence of iron and manganese in water causes

Discoloration of bathroom fixtures
None of these
Reduction in its dissolved oxygen content
Temporary hardness

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Environmental Engineering in CE
Scale formation in boiler is controlled by

Reduction in hardness, silica & alumina in feed water
Keeping the pH value of feed water just below 7
Eliminating H₂S in feed water
Preheating of feed water

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