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Waste Water Engineering

Waste Water Engineering
An inverted siphon is designed generally for

One pipe
Three pipes
Two pipes
Four pipes

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Waste Water Engineering
If the discharge of a sewer running half is 628 1.p.s., i = 0.001, and n = 0.010, the diameter of the sewer, is

1.49 m
1.69 m
1.59 m
1.39 m

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Waste Water Engineering
A rainfall may be classified as acidic if its pH value is less or equal to

7
6.5
5
6

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Waste Water Engineering
Boussinesq’s equation for ascertaining unit pressure at a depth on sewers due to traffic loads, is

pt = 2H3p/3 Z5
pt = 3H3p/2 Z5
pt = 3H3p/2 Z5
pt = 2H3p/3 Z5

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

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

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Waste Water Engineering
In sewage having fully oxidised organic matter, the nitrogen exists in the form of

Nitrates
Aluminoid nitrogen
Free ammonia
Nitrites

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