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Waste Water Engineering

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

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

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Waste Water Engineering
A cylindrical ejector having its height 2 m fills after every 10 minutes with a peak sewage discharge of 0.0157 cumec. The diameter of the ejector chamber, is

2.50 m
2.40 m
2.30 m
2.45 m

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

Nitrites
Free ammonia
Nitrates
Aluminoid nitrogen

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Waste Water Engineering
The screens are fixed

Perpendicular to the direction of flow
None of these
Parallel to the direction of flow
At an angle 30° to 60° to the direction of flow

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Waste Water Engineering
A rain sanitary sewer is constructed to carry

Ground water
Storm sewage
Surface water
Sanitary sewage

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Waste Water Engineering
If a paper moistened with lead acetate for five minutes when placed in manhole turns black. The sewer certainly contains

Methane
Oxygen
Carbon dioxide
Hydrogen sulphide

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