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Environmental Engineering

Environmental Engineering
If Biochemical oxygen demand (BOD) of a town is 20000 kg/day and BOD per capita per day is 0.05 kg, then population equivalent of town is

1,00,000
4,00,000
4000
1000

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Environmental Engineering
The devices which are installed for drawing water from the sources are called

Aquiclude
Intakes
Filters
Aquifers

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Environmental Engineering
Which of the following chemical compounds can be used for de-chlorination of water?

Bleaching powder
Carbon dioxide
Chloramines
Sulphur dioxide

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Environmental Engineering
If the sewage contains grease and fatty oils, these are removed in

Detritus tanks
Skimming tanks
Sedimentation tanks
Grit chambers

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Environmental Engineering
The relative stability of a sewage sample, whose dissolved oxygen is same as the total oxygen required to satisfy BOD, is

1
Infinite
Zero
100

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Environmental Engineering
The process of lagooning is primarily a means of

Increasing the capacity of storage reservoirs
Reducing the excessive flow in sewers
Increasing flow of sewage through imhoff tanks
Disposing of sludge

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