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Waste Water Engineering

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

All listed here
Hydrology
Temperature
Dissolved oxygen in water

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Waste Water Engineering
The most widely used pump for lifting sewage is

Pneumatic ejector
Reciprocating pump
Air pressure pump
Centrifugal pump

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Waste Water Engineering
The minimum diameter of sewer to be adopted is

15 cm
12.5 cm
25 cm
10 cm

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Waste Water Engineering
The following is the physical characteristic of sewage

Colour
Turbidity
All listed here
Odour

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Waste Water Engineering
For evaporation and measurement of settable solids, the apparatus used, is

A test tube
An Imhoff cone
A jar
A breaker

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Waste Water Engineering
If q is the average sewage flow from a city of population P, the maximum sewage flow

Q = [(4 + )/(18 + )] q
Q = [(5 + )/((15 + )] q
Q = [(18 + )/(4 + )] q
Q = [(18 + P)/(4 + )] q

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