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Waste Water Engineering

Waste Water Engineering
The gas evolved in sewers is

Carbondioxide
All of these
Methane
Hydrogen sulphide

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Waste Water Engineering
Sewer ventilating columns are generally placed at

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

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Waste Water Engineering
A nuisance is experienced in diluting water if dilution factor is less than

100
40
20
60

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Waste Water Engineering
If a 2% solution of sewage sample is incubated for 5 days at 20°C and the dissolved oxygen depletion was found to be 8 mg/l. The BOD of the sewage is

300 mg/l
400 mg/l
100 mg/l
200 mg/l

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Waste Water Engineering
The most dangerous pollutant in vehicular emissions is

CO₂
SO₂
CO₂
O₂

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Waste Water Engineering
The arrangement made for passing the sewer line below an obstruction below the hydraulic gradient lines called

all of these
Sag pipe
Depressed sewer
Inverted syphon

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MORE MCQ ON Waste Water Engineering

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