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Waste Water Engineering

Waste Water Engineering
Removal of oil and grease from sewage, is known

Filtration
Skimming
Screening
None of these

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Waste Water Engineering
The minimum diameter of sewer to be adopted is

10 cm
25 cm
15 cm
12.5 cm

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Waste Water Engineering
‘Cowl’ is provided at

First step in manhole
Upper end of the manhole
Lower end of ventilating column
Upper end of ventilating column

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Waste Water Engineering
Setting out the alignments of sewers may start from

City
Out-fall
Any point
Tail end

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Waste Water Engineering
The moisture content of sludge is reduced from 90% to 80% in a sludge digestion tank. The percentage decrease in the volume of sludge, is

0.25
0.1
0.5
0.05

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Waste Water Engineering
Dry water flow in a combined sewer, is

Domestic sewage
Inclusive of domestic and industrial sewage but excludes storm water
Storm water
Industrial sewage

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