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Environmental Engineering in CE

Environmental Engineering in CE
The earth's atmosphere is an envelope of gases present upto a height of about __________ kms.

10
1000
2000
200

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Environmental Engineering in CE
Salt content in sea water is about __________ percent.

0.5
1
3.5
10

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Environmental Engineering in CE
Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about __________ decibels.

70
30
3
100

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Environmental Engineering in CE
Which of the following is a secondary air pollutant?

Photochemical smog
Nitrogen dioxide
Dust particles
Sulphur dioxide

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Environmental Engineering in CE
TLV of NO₂ & NO exposure for the human being is 5 & 25 ppm respectively. Prolonged exposure of human being to NO₂ causes

Bronchitis
Bone disease
Skin disorder
Cancer

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Environmental Engineering in CE
Dust collection efficiency of a cyclone separator depends upon its

Diameter
All of these
Overall height
Inlet gas velocity

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