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Waste Water Engineering

Waste Water Engineering
In circular sewers if depth of flow is 0.2 times the full depth, the nominal gradient,

Is doubled
Is trebled
Is not enough
Is only provided

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Waste Water Engineering
The gas evolved in sewers is

Methane
Carbondioxide
Hydrogen sulphide
All of these

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Waste Water Engineering
A rainfall may be classified as acidic if its pH value is less or equal to

7
5
6
6.5

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Waste Water Engineering
Sewer manholes are generally provided at

All of these
The change of direction
The junctions of sewers
The change of gradient

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Waste Water Engineering
The underground sewers are more subjected to

Bending force
Tensile force
Compressive force
Shearing force

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Waste Water Engineering
If the length of overland flow from the critical point to the mouth of drain is 13.58 km and difference in level between the critical point and drain mouth is 10 m, the inlet time is

2 hours
4 hours
6 hours
8 hours

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