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Waste Water Engineering

Waste Water Engineering
The rational formula for peak drainage discharge, was evolved by

All of these
Lloyd David
Kuichling
Fruhling

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Waste Water Engineering
The detention time (t) of a settling tank, may be defined as the time required for

The flow of sewage to fill the tank
A particle to travel along its length
A particle to travel from top surface to bottom sludge zone
None of these

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Waste Water Engineering
In sewers designed with self cleansing velocity,

Both silting and scouring occur at the bottom
Neither silting nor scouring occurs at the bottom
The bottom is silted
The bottom is scoured

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Waste Water Engineering
Sewer pipes need be checked for

None of these
Both A and B
Maximum flow
Minimum flow

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Waste Water Engineering
Hume steel pipes are

Steel shell coated from inside with cement mortar
Both B and C
Steel shell coated from outside with cement mortar
Steel pipes

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Waste Water Engineering
The detention period for plain sedimentation water tanks, is usually

24 to 36 hours
4 to 8 hours
16 to 24 hours
8 to 16 hours

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