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Waste Water Engineering

Waste Water Engineering
Sewer manholes are generally provided at

The junctions of sewers
The change of gradient
All of these
The change of direction

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Waste Water Engineering
The non-clog pump which permits solid matter to pass out with the liquid sewage, is

Centrifugal pump
Reciprocating pump
None of these
Pneumatic ejector

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Waste Water Engineering
Lead acetate test in sewer manhole is done to test the presence of

Hydrogen sulphide
Carbondioxide gas
Methane gas
Diesel vapours

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Waste Water Engineering
At the junction of sewers

None of these
Top of smaller sewer is kept lower
Top of larger sewer is kept lower
Tops of both the sewers are at the same level

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Waste Water Engineering
Primary treatment of sewage consists of removal of

Large suspended organic solids
Sand and girt
Oil and grease
Floating materials

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Waste Water Engineering
1000 kg of sewage contains

0.112 kg in solution
0.225 kg in solution
Both A and C of above
0.112 kg in suspension

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