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Waste Water Engineering

Waste Water Engineering
The rate of accumulation of sludge per person per year, is

20 litres
10 litres
25 litres
15 litres

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Waste Water Engineering
The ratio of minimum hourly flow to the average flow of sewage is

43834
43833
43894
43832

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Waste Water Engineering
The digested sludge from septic tanks, is removed after a maximum period of

3 years
4 years
5 years
3.5 years

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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

120 cm
100 cm
110 cm
150 cm

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Waste Water Engineering
If is the diameter of upper circular portion, the overall depth of New Egg shaped sewer section, is

1.350 D
1.625 D
1.250 D
1.425 D

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Waste Water Engineering
For detecting the nitrates in sewage, the colour may be developed by adding

Phenol-di -sulphuric acid and potassium hydroxide
Potassium permanganate
Sulphuric acid and napthamine
None of these

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