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Waste Water Engineering

Waste Water Engineering
Which one of the following part of human body withstands minimum radiation?

Ovaries/testis
Eyes
Kidneys
Thyroid

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Waste Water Engineering
Large diameter sewers subjected to external pressure alone, are reinforced

Near the inner surface of the pipe
With elliptical cage
Near the outer surface of the pipe
Both A and B

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Waste Water Engineering
In trickling filter, B.O.D. is reduced to

40 to 60%
30 to 40%
60 to 80%
80 to 90%

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Waste Water Engineering
Fresh sewage is generally

Acidic
Alkaline
Highly decomposed
A source of objectionable odour

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Waste Water Engineering
The sewer which received discharge from two or more main sewers, is known as

A main sewer
A trunk sewer
An intercepting sewer
An outfall sewer

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Waste Water Engineering
The settlement of a particle in sedimentation tank, is affected by

Size and shape of solid
Viscosity of water
All listed here
Velocity of flow

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