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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

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

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Environmental Engineering
The pipe which is used to carry the discharge from sanitary fittings like bath rooms, kitchens etc. is called

Vent pipe
Waste pipe
Anti-siphonage pipe
Soil pipe

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Environmental Engineering
A pipe which is installed in the house drainage to preserve the water seal of traps is called

Waste pipe
Anti-siphonage pipe
Vent pipe
Soil pipe

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

B
4B
8B
2B

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Environmental Engineering
The suitable method of forecasting population for a young and rapidly increasing city is

Incremental increase method
Graphical method
Geometrical increase method
Arithmetical increase method

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Environmental Engineering
The maximum efficiency of BOD removal is achieved in

Trickling filters
Oxidation pond
Oxidation ditch
Aerated lagoons

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