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Waste Water Engineering

Waste Water Engineering
If is the rugosity coefficient, is the bed slope of sewer, the velocity of flow in m/sec may be obtained by the formula V = (1/n) r2/3 s1/2 evolved by

Manning
Bazin
Chezy
Kutter

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Waste Water Engineering
The screens are fixed

Perpendicular to the direction of flow
Parallel to the direction of flow
At an angle 30° to 60° to the direction of flow
None of these

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

Air pressure pump
Pneumatic ejector
Centrifugal pump
Reciprocating pump

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Waste Water Engineering
For efficient working of a sewer, it must be ensured that

Both (A) and (B)
Minimum velocity of 0.45 m/sec, is maintained at its minimum flow
Neither (A) nor (B)
A maximum velocity of 0.90 m/sec, is maintained at its maximum flow

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Waste Water Engineering
The value of Chezy’s constant C = 157.6/(1.81 + K/ ) is used in

Bazin’s formula
Manning’s formula
Kutter’s formula
Chezy’s formula

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Waste Water Engineering
The sewer which received discharge from two or more main sewers, is known as

An intercepting sewer
An outfall sewer
A trunk sewer
A main sewer

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