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Environmental Engineering in CE

Environmental Engineering in CE
Ozone is

Impervious to ultra-violet rays
Both B & C
A secondary pollutant
A primary pollutant

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Environmental Engineering in CE
The lowest layer of atmosphere is known as the

Stratosphere
None of these
Ionosphere
Troposphere

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Environmental Engineering in CE
The length of rectangular sedimentation tank should not be more than(Where ‘B’ is the width of the tank)

4B
B
8B
2B

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

Biomass burning
Urea
Combustion
Trees

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Environmental Engineering in CE
Noise level audible to audience sitting in the 5th row from the stage during a large orchestra show corresponds to about __________ decibels.

160
135
105
185

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Environmental Engineering in CE
Iron & manganese present in the polluted water is removed by

Chlorination only
Chemical coagulation
Simple filtration
Oxidation followed by settling & filtration

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