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Waste Water Engineering

Waste Water Engineering
If is the diameter of upper circular portion, the overall depth of a standard egg shaped section, is

1.15 D
1.75 D
1.25 D
1.5 D

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

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

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Waste Water Engineering
It is customary to design a sewer for D.W.F. on the basis of

Four times the average demand
Twice the average demand
Average demand
Thrice the average demand

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Waste Water Engineering
The digested sludge from septic tanks, is removed after a maximum period of

4 years
3 years
5 years
3.5 years

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Waste Water Engineering
The sewage treatment in septic tanks is due to

None of these
Parasitic decomposition
Anaerobic decomposition
Aerobic decomposition

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Waste Water Engineering
Which one of the following gases is most significant as air pollutant?

Sulphur-dioxide
Nitrogen
Carbondioxide
Oxygen

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