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Environmental Engineering in CE

Environmental Engineering in CE
Algae growth in water is controlled by

Chlorination
Deoxidation
Aeration
Bleaching

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Environmental Engineering in CE
The major reason of hydrodynamic noise (i.e., noise resulting from liquid flow) is

Cavitation
Fluctuation in liquid flow
Pipe vibrations
Boundary layer separation

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Environmental Engineering in CE
Radioactive solid nuclear wastes are disposed off by

High temperature incineration
Pyrolysis
Underground burial in concrete containers
Pathological incineration

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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
4B
B

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Environmental Engineering in CE
Which of the following dust collection equipments is the least efficient (for sub-micronic particles)?

Dust catcher (gravity type)
Bag filter
Hollow wet scrubber
Cyclone separator

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Environmental Engineering in CE
COD of raw municipal sewage may be in the range of about __________ mg/litre.

5-10
1-2
90-120
1500-2500

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