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Waste Water Engineering

Waste Water Engineering
The water carried sewerage system removes

All listed here
Industrial sewage
Domestic sewage
Storm sewage

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Waste Water Engineering
For the COD test of sewage, organic matter is oxidised by K₂Cr₂O₇ in the presence of

None of these
HCl
H₂SO₄
HNO₃

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Waste Water Engineering
For sewers, inverted siphon is provided for

Four pipes
Three pipes
Two pipes
One pipe

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Waste Water Engineering
The detention time of a circular tank of diameter d and water depth H, for receiving the sewage Q per hour, is

d (0.285d + 0.011H)/Q
d (0.785d + 0.011H)/Q
d (0.022d + 0.085H)/Q
d² (0.011d + 0.785H)/Q

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Waste Water Engineering
Large diameter sewers subjected to external pressure alone, are reinforced

With elliptical cage
Near the inner surface of the pipe
Near the outer surface of the pipe
Both A and B

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Waste Water Engineering
The sewage is pumped up

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

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