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Environmental Engineering in CE

Environmental Engineering in CE
Noise emitted by a ventilation fan at a distance of 3 metres is about __________ decibels.

145
125
85
105

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Environmental Engineering in CE
Smog is not formed due to the presence of __________ in the atmosphere.

NOx
SO₂
Any of these
CO₂

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Environmental Engineering in CE
Presence of soluble organics in polluted water causes

Undesirable plants growth
Depletion of oxygen
Explosion hazards
Fire hazards

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Environmental Engineering in CE
Limestone powder is injected during pulverised coal burning in boilers to __________ the flue gases.

None of these
Increase the dew point of
Catalytically convert SO₂ to SO₃ in
Reduce SO₂ content in

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Environmental Engineering in CE
Smog is

Nothing but black smoke
A solid particle e.g. flyash
A liquid particle resulting from vapor condensation
A combination of smoke and fog

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Environmental Engineering in CE
Noise pollution level in a chemical plant is expressed in

Roentgen
Decibel
Hertz
None of these

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