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Waste Water Engineering

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

Ovaries/testis
Thyroid
Kidneys
Eyes

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Waste Water Engineering
If the flame of a miner's safety lamp in the upper layers of the sewer forms an explosive, the sewer certainly contains

Methane
Hydrogen sulphide
Oxygen
Carbon dioxide

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Waste Water Engineering
Sewer ventilating columns are generally placed at

Upper ends of branch sewers
Distances 150 m to 300 m
Every change in the size of sewers
All listed here

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Waste Water Engineering
Sewer pipes are designed for maximum discharge with 25% to 33% vacant cross-sectional area for

All of these
Unexpected increase in the population
Under estimates of maximum and average flows
Unexpected large scale infiltration of stream water

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Waste Water Engineering
Depletion of ozone layer in the outer atmosphere may cause

Heart disorder
Skin cancer
Bronchitis
Lung cancer

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Waste Water Engineering
In a residential colony, sewers of diameters 100 mm, 150 mm and 225 mm were laid with a gradient 1 in 120. Which portion of the sewage system does not choke in due course of time?

100 mm dia
150 mm dia
225 mm dia
All of these

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