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Waste Water Engineering

Waste Water Engineering
In normal conditions, the period for sludge digestion, is

60 days
20 days
10 days
30 days

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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

1.625 D
1.425 D
1.250 D
1.350 D

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Waste Water Engineering
Acid regression stage of sludge digestion at a temperature 21°C extends over a period of

90 days
30 days
60 days
15 days

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Waste Water Engineering
Which one of the following part of human body withstands minimum radiation?

Eyes
Thyroid
Ovaries/testis
Kidneys

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Waste Water Engineering
If the diameter of a sewer is 100 mm, the gradient required for generating self cleansing velocity is

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

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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
Sulphuric acid and napthamine
None of these
Potassium permanganate

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