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Waste Water Engineering

Waste Water Engineering
A manhole is generally provided at each

Bend
Junction
All of these
Change of gradient

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Waste Water Engineering
A drop manhole is provided if

A sewer drops from a height
None of these
A branch sewer joins the main sewer at higher level
A lamp is inserted to check obstruction

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Waste Water Engineering
For a peak discharge of 0.0157 cumec, with a velocity of 0.9 m/sec, the diameter of the sewer main, is

15 cm
10 cm
12 cm
18 cm

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Waste Water Engineering
The most widely used pump for lifting sewage is

Pneumatic ejector
Centrifugal pump
Reciprocating pump
Air pressure pump

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Waste Water Engineering
To maintain aerobic biological activity, the moisture content of the compost mass should be about

0.55
0.5
0.45
0.6

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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
Depressed sewer
all of these
Inverted syphon

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