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Waste Water Engineering

Waste Water Engineering
The porosity of sediments in sewer pipes, is usually taken as

0.01
0.013
0.012
0.011

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Waste Water Engineering
The presence of free ammonia in sewage, is detected by

Adding potassium permanganate
Boiling
Adding sulphuric acid
Phenol-di-sulphuric acid

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Waste Water Engineering
The quantity of liquid waste which flows in sewers during the period of rainfall, is known

Industrial waste
None of these
Sanitary sewage
Storm sewage

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Waste Water Engineering
If 2% solution of a sewage sample is incubated for 5 days at 20°C and depletion of oxygen was found to be 5 ppm, B.O.D. of the sewage is

200 ppm
None of these
250 ppm
225 ppm

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

100 m
200 m
150 m
300 m

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Waste Water Engineering
The sewage is pumped up

From flat areas
From low lying areas
From basements
All listed here

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