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Waste Water Engineering

Waste Water Engineering
The width of a settling tank with 2 hour detention period for treating sewage 378 cu m per hour, is

5 m
5.5 m
6.5 m
7 m

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Waste Water Engineering
The sewer which collects the discharge from a collecting system and delivers it to a treatment plant, is known

Branch sewer
House sewer
Lateral sewer
Sewer outfall

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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
Hume steel pipes are

Steel pipes
Steel shell coated from inside with cement mortar
Both B and C
Steel shell coated from outside with cement mortar

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

Over flow rate
Over flow velocity
All of these
Surface loading

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Waste Water Engineering
The flow velocity in detritus tanks is

1.25 m/sec
0.09 m/sec
0.05 m/sec
None of these

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