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Waste Water Engineering

Waste Water Engineering
Which one of the following tests is used for testing sewer pipes?

Mirror test
Water test
Ball test
All of these

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Waste Water Engineering
The pH value of sewage is determined with the help of

Imhoff Cone
Potentiometer
None of these
Turbid meter

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Waste Water Engineering
pH value of sludge during alkaline regression stage, is

More than 6
Less than 6
Less than 7
More than 7

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Waste Water Engineering
For design purposes, the normal rate of infiltration of ground water into the sewer, is

2000 litres/km/cm
500 litres/km/cm
1500 litres/km/cm
1000 litres/km/cm

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Waste Water Engineering
Disposal to sewage in large cities, is done in

Oxidation
Dilution
Irrigation
Purification

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Waste Water Engineering
The settling velocity of the particles larger than 0.06 mm in a settling tank of depth 2.4 is 0.33 m per sec. The detention period recommended for the tank, is

1 hour and 30 minutes
30 minutes
1 hour
2 hours

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