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Waste Water Engineering

Waste Water Engineering
In a city the ratio of the drainage to sewage is 20, the percentage discharge passing through non-monsoon periods, is

5
15
20
10

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Waste Water Engineering
Which one of the following resists hydrogen sulphide corrosion?

R.C.C.
Asbestos cement
Glazed stone wares
Glazed ware

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Waste Water Engineering
The most efficient cross section of sewers in a separate sewerage system is

Parabolic
New egged
Rectangular
Circular

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Waste Water Engineering
Sewer ventilating columns are generally placed at

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

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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?

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

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Waste Water Engineering
15 cumecs, the depth d and width are related by For drains up to

B = 0.5 d
B = 0.2 d
d = 0.2 B
d = 0.5 B

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