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Waste Water Engineering

Waste Water Engineering
The following is the physical characteristic of sewage

Colour
Turbidity
All listed here
Odour

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

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

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Waste Water Engineering
The liquid wastes from kitchens, bath rooms and wash basins, is not called

None of these
Sewage
Sullage
Liquid waste

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Waste Water Engineering
A drop manhole is provided if

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

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Waste Water Engineering
You are asked to design sewer pipes of diameters 0.4 m to 0.9 m at maximum flow, you will assume the sewer flow running at

Half full
Two third full
Three fourth full
Full depth

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Waste Water Engineering
Rate of flow of sewage is generally assumed

Less than the rate of water supply
More than the rate of water supply
Equal to the rate of water supply
At 150 litres per capita

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