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Waste Water Engineering

Waste Water Engineering
For trunk and out-fall, the type of sewers generally used, is

Parabolic shaped
Standard egg shaped
Horse shoe shaped
Circular shaped

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Waste Water Engineering
Facultative bacteria survive in

Both cases A and B
The presence of oxygen
Neither A nor B
The absence of oxygen

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Waste Water Engineering
The gas evolved in sewers is

Carbondioxide
Methane
All of these
Hydrogen sulphide

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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

Sulphuric acid
Citric acid
Hydrochloric acid
Nitric acid

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Waste Water Engineering
The small sewers are cleaned by

Wooden pills
Flushing
None of these
Cane rodding

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Waste Water Engineering
Pathogens (or pathogenic bacterias) in water may cause

Typhoid
Dysentery
Cholera
All listed here

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