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Waste Water Engineering

Waste Water Engineering
Lead caulked joints are used for laying

I. pipes
Stone ware pipes
G.I. pipes
Earthenware pipes

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Waste Water Engineering
With self cleansing velocity in sewers

Neither silting nor scouring occurs at bottom
Both silting and scouring occur at bottom
Silting occurs at bottom
Scouring occurs at bottom

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Waste Water Engineering
The sewerage system originates from

Branch sewers
Main sewers
Lateral sewers
House sewers

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Waste Water Engineering
Boussinesq’s equation for ascertaining unit pressure at a depth on sewers due to traffic loads, is

pt = 2H3p/3 Z5
pt = 2H3p/3 Z5
pt = 3H3p/2 Z5
pt = 3H3p/2 Z5

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

40,000 to 50,000 litres/sqm/day
25,000 to 35,000 litres/sqm/day
80,000 to 10,000 litres/sqm/day
50,000 to 60,000 litres/sqm/day

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Waste Water Engineering
The gradient of sewers depends upon

Discharge
All listed here
Velocity of flow
Diameter of the sewer

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