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Waste Water Engineering

Waste Water Engineering
In 1000 kg of sewage, the total solids approximate

0.5 to 1.0 kg
1 kg to 2.0 kg
5 kg to 7.5 kg
7.5 kg to 10 kg

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Waste Water Engineering
The sewer which resists sulphide corrosion, is

Brick sewer
Lead sewer
Cast iron sewer
R.C. sewer

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Waste Water Engineering
To test chemical oxygen demand (C.O.D.) of sewage, organic matter is oxidised by potassium dichromate in the presence of

Hydrochloric acid
Nitric acid
Citric acid
Sulphuric acid

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Waste Water Engineering
If is the rugosity coefficient, is the bed slope of sewer, the velocity of flow in m/sec may be obtained by the formula V = (1/n) r2/3 s1/2 evolved by

Manning
Chezy
Bazin
Kutter

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Waste Water Engineering
In septic tanks, decomposition of organic bacteria, is done by

Both types of bacterias
None of these
Anaerobic bacteria
Aerobic bacteria

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Waste Water Engineering
A manhole is classified as shallow if its depth is between

0.4 to 0.5 m
0.9 to 1.20 m
0.5 to 0.7 m
0.7 to 0.9 m

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