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Waste Water Engineering

Waste Water Engineering
If the pH value of sewage is 7

It is neutral
It is acidic
None of these
It is alkaline

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Waste Water Engineering
The pH value of sewage is determined with the help of

Turbid meter
None of these
Potentiometer
Imhoff Cone

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Waste Water Engineering
The maximum depth of sedimentation tanks, is kept

3.5 m
3 m
4 m
4.5 m

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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

Three fourth full
Full depth
Two third full
Half full

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Waste Water Engineering
If D is the diameter of a circular sewer and D’ is the top horizontal diameter of an equivalent egg shaped section, the relationship which holds good, is

D’ = 0.64 D
D’ = 0.94 D
D’ = 0.84 D
D’ = 0.74 D

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Waste Water Engineering
The sewer that unloads the sewage at the point of treatment is called

Branch sewer
Main sewer
Outfall sewer
House sewer

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