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Waste Water Engineering

Waste Water Engineering
During purification process of sewage the gas given off, is

Ammonia
Carbon dioxide
Hydrogen
All listed here

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Waste Water Engineering
Pick up the incorrect size of stone ware sewers

67.5 cm
52.5 cm
None of these
82.5 cm

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Waste Water Engineering
The reduced levels of the string at the consecutive sight rails A and B are 203.575 m, 203.475 m respectively. If the difference of their R.D.s is 10 m, the gradient of the sewer line is

1 in 503 upward
1 in 100 downward
1 in 500 upward
1 in 100 upward

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Waste Water Engineering
The sewerage system consists of

House sewer
All of these
Lateral sewer
Branch sewer

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Waste Water Engineering
15 cumecs, the depth d and width are related by For drains up to

d = 0.2 B
B = 0.5 d
B = 0.2 d
d = 0.5 B

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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

0.1
0.5
0.25
0.05

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