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Waste Water Engineering

Waste Water Engineering
A manhole is generally provided at each

Bend
All of these
Junction
Change of gradient

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Waste Water Engineering
In a sludge tank, the gas mainly produced, is

Nitrogen
Carbon dioxide
Hydrogen
Oxygen

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Waste Water Engineering
In SI units the power of sound is represented in

Newtons
Joules
Kgs
Watts

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Waste Water Engineering
15 cumecs, the depth d and width are related by For drains up to

B = 0.5 d
d = 0.2 B
d = 0.5 B
B = 0.2 d

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Waste Water Engineering
If a 2% solution of sewage sample is incubated for 5 days at 20°C and the dissolved oxygen depletion was found to be 8 mg/l. The BOD of the sewage is

300 mg/l
200 mg/l
100 mg/l
400 mg/l

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Waste Water Engineering
At the junction of sewers

Top of larger sewer is kept lower
Tops of both the sewers are at the same level
None of these
Top of smaller sewer is kept lower

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