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Environmental Engineering in CE

Environmental Engineering in CE
In water chemical treatment plant, use of chloramines ensures

Weed control in reservoirs
Disinfection
Removal of permanent hardness
Taste & odour control

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Environmental Engineering in CE
Septic tanks are used for the __________ of the deposited solids.

Aerobic decomposition
Anaerobic decomposition
Separation
None of these

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Environmental Engineering in CE
Permissible safe limit (TLV) of __________ toxic gas is 100-1000 parts per million (ppm).

Highly
Very extremely
Moderately
Extremely

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Environmental Engineering in CE
Presence of nitrogen and phosphorous in waste water discharged into lakes and ponds causes

Odour nuisances
Undesirable plant growth
Turbidity
Foaming

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Environmental Engineering in CE
In water treatment, alum[Al2(SO₄)3] is used for the process of

Filtration
Disinfection
Sedimentation
Coagulation

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Environmental Engineering in CE
Which of the following is the most active zone of atmosphere in which weathering events like rain, storm & lightning occur?

Troposphere
None of these
Stratosphere
Thermosphere

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