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Waste Water Engineering

Waste Water Engineering
The maximum diameter of sewers adopted in the designs is

1.0 m
2.0 m
4.0 m
3.0 m

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Waste Water Engineering
For trunk sewers more than 1.25 m in diameter, the ratio of the maximum daily sewage flow to the average daily sewage flow is assumed

1.5
2
3
2.5

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Waste Water Engineering
For house drainage minimum gradient is

1 in 10
1 in 60
1 in 80
1 in 400

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Waste Water Engineering
The sewer which resists sulphide corrosion, is

Lead sewer
Brick sewer
Cast iron sewer
R.C. sewer

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Waste Water Engineering
In case of Imhoff tanks,

All of these
Detention period is 2 hours
The velocity of flow is restricted to 0.30 m/minute
The shape is rectangular

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

Heart disorder
Lung cancer
Skin cancer
Bronchitis

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