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Environmental Engineering in CE

Environmental Engineering in CE
Presence of dissolved impurities of __________ is responsible for the red brownish color of water.

Iron & manganese
Carbonates
Bi-carbonates
Arsenic

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Environmental Engineering in CE
The permissible color for domestic water supply is __________ ppm.

1000
100
20
1

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Environmental Engineering in CE
Reingleman chart is used for the evaluation of __________ pollution.

Air
Water
Noise
Radioactive

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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)

8B
2B
B
4B

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

0.1
25
5
1

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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

Skimming mill
Lagoon
Cesspool
Septic tank

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