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Waste Water Engineering

Waste Water Engineering
The factor responsible for purification of sewage in river is

Hydrology
All listed here
Temperature
Dissolved oxygen in water

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Waste Water Engineering
Lead acetate test in sewer manhole is done to test the presence of

Methane gas
Diesel vapours
Carbondioxide gas
Hydrogen sulphide

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Waste Water Engineering
Sewer ventilating columns are generally placed at

All listed here
Every change in the size of sewers
Distances 150 m to 300 m
Upper ends of branch sewers

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Waste Water Engineering
An inverted siphon is designed generally for

Two pipes
Three pipes
Four pipes
One pipe

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

Dysentery
Typhoid
All listed here
Cholera

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Waste Water Engineering
For house drainage minimum gradient is

1 in 400
1 in 60
1 in 10
1 in 80

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