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Waste Water Engineering

Waste Water Engineering
During purification process of sewage the gas given off, is

Hydrogen
Carbon dioxide
All listed here
Ammonia

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Waste Water Engineering
Ventilating shafts are provided to a sewer line at every

200 m
100 m
300 m
150 m

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Waste Water Engineering
Pick up the incorrect size of stone ware sewers

67.5 cm
82.5 cm
None of these
52.5 cm

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Waste Water Engineering
Drop manholes are the manholes

Without manhole covers
With depths more than 3.5 m
Without entry ladders
Having drains at different levels

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Waste Water Engineering
A five day B.O.D. at 15°C of the sewage of a town is 100 kg/day. If the 5 day B.O.D. per head at 15°C for standard sewage is 0.1 kg/day, the population equivalent is

1000
5000
10000
100

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Waste Water Engineering
The temperature affects the

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

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