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Waste Water Engineering

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

Hydrology
Temperature
All listed here
Dissolved oxygen in water

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Waste Water Engineering
A drop manhole is provided if

A lamp is inserted to check obstruction
A branch sewer joins the main sewer at higher level
A sewer drops from a height
None of these

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Waste Water Engineering
Clogging of sewers, is caused due to

Silting
All of these
Greasy and oily matters
Low discharge

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Waste Water Engineering
The most effective arrangement for diverting excess storm water into a natural drainage, is

Leaping weir
Siphon spill way
None of these
Overflow weir

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Waste Water Engineering
The self-cleansing velocity of water flowing through pipe lines, is

2 metres/sec
0.25 metre/sec
1 metre/sec
0.5 metre/sec

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Waste Water Engineering
Are available in size Stoneware sewers

All of these
10 cm
20 cm
15 cm

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