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Waste Water Engineering

Waste Water Engineering
A nuisance is experienced in diluting water if dilution factor is less than

40
60
20
100

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Waste Water Engineering
If the diameter of sewer is 225 mm, the gradient required for generating self cleansing velocity, is

None of these
1 in 100
1 in 120
1 in 60

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Waste Water Engineering
In circular sewers if depth of flow is 0.2 times the full depth, the nominal gradient,

Is trebled
Is only provided
Is not enough
Is doubled

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Waste Water Engineering
The sewer which collects the discharge from a collecting system and delivers it to a treatment plant, is known

House sewer
Branch sewer
Sewer outfall
Lateral sewer

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

Lung cancer
Bronchitis
Heart disorder
Skin cancer

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Waste Water Engineering
In olden days the type of section adopted in trunk and out fall sewers was

Parabolic shaped
Circular shaped
Horse shoe shaped
Egg shaped

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