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Waste Water Engineering

Waste Water Engineering
As compared to fresh river water, sea water contains oxygen

10% less
10% more
20% more
20% less

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Waste Water Engineering
A sewer running partially full and hurried with back filled, fails in compression due to

All listed here
Superimposed traffic loads
Weight of the back fill
Weight of the pipe

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Waste Water Engineering
For detecting the nitrates in sewage, the colour may be developed by adding

Potassium permanganate
Phenol-di -sulphuric acid and potassium hydroxide
None of these
Sulphuric acid and napthamine

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Waste Water Engineering
The moisture content of sludge is reduced from 90% to 80% in a sludge digestion tank. The percentage decrease in the volume of sludge, is

0.05
0.5
0.25
0.1

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Waste Water Engineering
House connections to the laterals is generally made by

Glazed stonewares
Cast iron
P.C.C.
R.C.C.

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Waste Water Engineering
The spacing of man holes along a straight portion of a sewer is 300 m, the diameter of the sewer may be

1.2 m
> 1.5 m
0.9 cm
1.5 m

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