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Waste Water Engineering

Waste Water Engineering
In sewage having fully oxidised organic matter, the nitrogen exists in the form of

Nitrites
Nitrates
Free ammonia
Aluminoid nitrogen

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Waste Water Engineering
The most efficient cross-section of sewers in a combined sewerage system is

Circular
Parabolic
New egged
Rectangular

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Waste Water Engineering
The maximum depth of sedimentation tanks, is kept

4 m
4.5 m
3 m
3.5 m

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Waste Water Engineering
The temperature affects the

Biological activity of bacteria in sewage
Viscosity of sewage
Solubility of gases in sewage
All of these

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Waste Water Engineering
The sewage treatment units in which anaerobic decomposition of organic matter is used, are called

Sludge sedimentation tanks
None of these
Imhoff tanks
Trickling filters

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Waste Water Engineering
The sewage treatment in septic tanks is due to

Aerobic decomposition
Parasitic decomposition
Anaerobic decomposition
None of these

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