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Waste Water Engineering

Waste Water Engineering
The suitable cross-section of sewers to carry combined flow, is

Rectangular
Horse shoe shaped
Egg shaped
Circular

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Waste Water Engineering
Lead caulked joints are used for laying

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

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Waste Water Engineering
Are available in size Stoneware sewers

10 cm
15 cm
All of these
20 cm

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Waste Water Engineering
The discharge per unit plan area of a sedimentation tank, is generally called

All of these
Over flow rate
Over flow velocity
Surface loading

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Waste Water Engineering
Bio-chemical oxygen demand (BOD) for the first 20 days in generally referred to

First stage demand
Carbonaceous demand
Initial demand
All of these

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Waste Water Engineering
In a sludge digestion tank if the moisture content of sludge V1 litres is reduced from p1 % to p2 % the volume V2 is

[(100 + P2)/(100 – P1)] V1
[(100 – P1)/(100 + P2)] V1
[(100 – P1)/(100 – P2)] V1
[(100 + P1)/(100 – P2)] V1

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