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Environmental Engineering in CE

Environmental Engineering in CE
Tolerable limit of nitrogen oxides in air is __________ ppm.

5
1
0.1
25

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Environmental Engineering in CE
Global warming may result in

Decrease in food productivity
Cyclone
All of these
Flood

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Environmental Engineering in CE
Atmospheric pollution caused by the exhaust gas of supresonic transport air-crafts is mostly in the atmospheric region called

Stratosphere
Troposphere
Thermosphere
Mesosphere

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Environmental Engineering in CE
'Particulate' air pollutants are finely divided solids and liquids. Which of the following is not a 'particulate'?

Smoke & fumes
Dust & mists
Photochemical smog & soot
None of these

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Environmental Engineering in CE
Operating principle of cyclone separator is based on the action of __________ dust particles.

Diffusion of
Centrifugal force on
Electrostatic force on
Gravitational force on

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Environmental Engineering in CE
Septic tanks are used for the __________ of the deposited solids.

Aerobic decomposition
Anaerobic decomposition
Separation
None of these

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