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Waste Water Engineering

Waste Water Engineering
If the diameter of a sewer is 150 mm, the gradient required for generating self cleansing velocity, is

1 in 100
None of these
1 in 120
1 in 60

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Waste Water Engineering
The rational formula for peak drainage discharge, was evolved by

Lloyd David
Fruhling
Kuichling
All of these

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Waste Water Engineering
The small sewers are cleaned by

Wooden pills
None of these
Cane rodding
Flushing

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Waste Water Engineering
If q is the average sewage flow from a city of population P, the maximum sewage flow

Q = [(18 + P)/(4 + )] q
Q = [(4 + )/(18 + )] q
Q = [(5 + )/((15 + )] q
Q = [(18 + )/(4 + )] q

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Waste Water Engineering
The intensity of rain is expressed in

cm/day
None of these
cm/minute
cm/hour

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Waste Water Engineering
Which of the following pumps in used to pump sewage solids with liquid sewage without clogging the pump is?

None of these
Pneumatic ejector
Centrifugal pump
Reciprocating pump

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