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Waste Water Engineering

Waste Water Engineering
The algae dies out in the zone of

Degradation
Active decomposition
Recovery
Cleaner water

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Waste Water Engineering
The sludge does not contain waste water from

Toilets
Kitchen sinks
Wash basins
Bath rooms

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Waste Water Engineering
A safety lamp when inserted in the upper portion of a manhole causes flames. It indicates the presence of

Petrol vapours
Methane gas
Carbondioxide gas
Hydrogen sulphide gas

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Waste Water Engineering
The width of a rectangular sewer is twice its depth while discharging 1.5 m/sec. The width of the sewer is

0.88 m
1.36 m
1.76 m
0.68 m

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Waste Water Engineering
In detritus tanks,

All listed here
Detention period is kept 3 to 4 minutes
Organic and inorganic materials are separated
Flow velocity is kept 0.09 m/sec

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Waste Water Engineering
In very first stage of decomposition of the organic matter in sewage

Nitrates are formed
Carbondioxide is formed
Nitrites are formed
Ammonia is formed

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MORE MCQ ON Waste Water Engineering

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