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Waste Water Engineering

Waste Water Engineering
Clogging of sewers, is caused due to

All of these
Low discharge
Greasy and oily matters
Silting

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Waste Water Engineering
The arrangement made for passing the sewer line below an obstruction below the hydraulic gradient lines called

Sag pipe
all of these
Depressed sewer
Inverted syphon

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Waste Water Engineering
The average temperature of sewage in India, is

15°C
10°C
20°C
25°C

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Waste Water Engineering
The normal values of over flow rates for sedimentation tanks using coagulant, ranges between

25,000 to 35,000 litres/sqm/day
80,000 to 100,000 litres/sqm/day
40,000 to 50,000 litres/sqm/day
50,000 to 60,000 litres/sqm/day

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Waste Water Engineering
The rate of accumulation of sludge in septic tanks is recommended as

30 litres/person/month
25 litres/person/year
25 litres/person/month
30 litres/person/year

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Waste Water Engineering
The formula V = (1/n) r2/3

Chezy’s formula
Bazin’s formula
Kutter’s formula
Manning’s formula

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