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Waste Water Engineering

Waste Water Engineering
The rate of accumulation of sludge per person per year, is

25 litres
20 litres
10 litres
15 litres

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Waste Water Engineering
Dry weather flow is:

Water supply allowance per capita
Average monthly rate of flow
Average annual rate of flow
Average daily rate of flow

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Waste Water Engineering
During preliminary treatment of a sewage

Girt and sand are removed by girt chambers
All listed here
Floating materials are removed by screening
Oil and grease are removed from skimming tanks

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Waste Water Engineering
1000 kg of sewage contains

0.112 kg in suspension
Both A and C of above
0.225 kg in solution
0.112 kg in solution

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

New egged
Circular
Parabolic
Rectangular

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

Nitrites
Free ammonia
Nitrates
Aluminoid nitrogen

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