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Waste Water Engineering

Waste Water Engineering
The sludge does not contain waste water from

Toilets
Bath rooms
Wash basins
Kitchen sinks

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Waste Water Engineering
The dimensions of a rectangular settling tank are: length 24 m, width 6 m and depth 3 m. If 2 hour detention period for tanks is recommended, the rate of flow of sewage per hour, is

208 cu.m
212 cu.m
204 cu.m
216 cu.m

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

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

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Waste Water Engineering
For house drainage minimum gradient is

1 in 400
1 in 60
1 in 80
1 in 10

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Waste Water Engineering
The presence of free ammonia in sewage, is detected by

Adding potassium permanganate
Phenol-di-sulphuric acid
Boiling
Adding sulphuric acid

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Waste Water Engineering
In 1000 kg of sewage, the total solids approximate

1 kg to 2.0 kg
5 kg to 7.5 kg
7.5 kg to 10 kg
0.5 to 1.0 kg

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