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Environmental Engineering in CE

Environmental Engineering in CE
Noise level inside a jet air liner in normal flight is about __________ decibels.

125
80
145
100

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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?

NOx
F
SO₂
Hg

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Environmental Engineering in CE
A masonry structure built below ground level, where biochemical reaction takes place due to anaerobic bacteria is called

Cesspool
Lagoon
Septic tank
Skimming mill

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Environmental Engineering in CE
Insufficient washing of sand grains in a rapid sand filter causes

Air binding
Expansion of filtering media
Shrinkage of filtering media
Mud balls

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Environmental Engineering in CE
A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of __________ high above earth's atmosphere, which absorbs it.

Ozone
Hydrogen
None of these
Carbon dioxide

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Environmental Engineering in CE
The effect of increase in carbon dioxide level of the atmosphere and its profound effect on our climate is called the

Global warming
Catalytic conversion
Green house effect
Both B and C

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