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Waste Water Engineering

Waste Water Engineering
For a grit chamber, if the recommended velocity of flow is 0.2 m/sec and detention period is 2 minutes, the length of the tank, is

16 m
20 m
24 m
30 m

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Waste Water Engineering
Sewer manholes are generally provided at

The junctions of sewers
The change of direction
All of these
The change of gradient

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Waste Water Engineering
Maximum permissible velocity 1.5 m/sec, is adopted in drains

With beds of rocks and gravels
Lined with stones
Both A. and B.
Neither A. nor B.

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

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

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Waste Water Engineering
Primary treatment of sewage consists of removal of

Large suspended organic solids
Oil and grease
Floating materials
Sand and girt

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Waste Water Engineering
During purification process of sewage the gas given off, is

Carbon dioxide
All listed here
Ammonia
Hydrogen

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