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Waste Water Engineering

Waste Water Engineering
The minimum diameter of sewer to be adopted is

25 cm
12.5 cm
15 cm
10 cm

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Waste Water Engineering
‘Cowl’ is provided at

Lower end of ventilating column
First step in manhole
Upper end of the manhole
Upper end of ventilating column

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Waste Water Engineering
With self cleansing velocity in sewers

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

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Waste Water Engineering
The settlement of a particle in sedimentation tank, is affected by

Viscosity of water
All listed here
Size and shape of solid
Velocity of flow

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Waste Water Engineering
The most efficient cross section of sewers in a separate sewerage system is

Rectangular
Parabolic
New egged
Circular

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Waste Water Engineering
If the peak discharge of a storm water drain (S.W. Drain) is expected to exceed 150 cumecs, the free board to be provided, is

50 cm
80 cm
90 cm
100 cm

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