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Waste Water Engineering

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

Methane gas
Diesel vapours
Carbondioxide gas
Hydrogen sulphide

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Waste Water Engineering
If the diameter of sewer is 225 mm, the gradient required for generating self cleansing velocity, is

1 in 100
1 in 120
1 in 60
None of these

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Waste Water Engineering
In a fully mechanised composting plant, involves

All of these
Mechanized pulverising of refuse
Mechanized receipt
Mechanized segregation

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Waste Water Engineering
The grit chambers of sewage treatment plants, are generally cleaned after

14 days
2 days
7 days
12 days

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Waste Water Engineering
The sewage discharge in a detritus tank of a treatment plant is 576 litres/sec with flow velocity of 0.2 m/sec. If the ratio of width to depth is 2, the depth is

150 cm
100 cm
120 cm
110 cm

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Waste Water Engineering
Flocculated particles do not change their

Weight
None of these
Shape
Size

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