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Environmental Engineering in CE

Environmental Engineering in CE
Which of the following is a manmade source of air pollution?

Automobile exhaust
Bacterial action in soil and swamp areas
Forest fire
All of these

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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?

F
SO₂
NOx
Hg

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

145
85
125
105

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Environmental Engineering in CE
The maximum CO₂ is emitted into the atmosphere by

Combustion
Biomass burning
Trees
Urea

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Environmental Engineering in CE
CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing __________ molecules of ozones.

10¹⁵
10⁵
10⁹
10²

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Environmental Engineering in CE
Which of the following pollutants, if present in atmosphere is detectable by its odour?

NO₂
CO₂
CO
SO₂

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