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Waste Water Engineering

Waste Water Engineering
In a trickling filter

Neither A nor B
Biological action is used
Filtration process is used
Both A and B

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Waste Water Engineering
Clogging of sewers, is caused due to

Silting
All of these
Low discharge
Greasy and oily matters

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Waste Water Engineering
When drainage to sewage ratio is 20, the peak dry weather flow is

Slightly less than 5% of the design discharge
Slightly more than 5% of the design discharge
None of these
20% of the design discharge

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Waste Water Engineering
Removal of oil and grease from sewage, is known

None of these
Skimming
Screening
Filtration

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Waste Water Engineering
For trunk and out-fall, the type of sewers generally used, is

Parabolic shaped
Horse shoe shaped
Standard egg shaped
Circular shaped

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Waste Water Engineering
In a grit chamber of a sewage treatment plant,

Depth of 0.9 m to 1.20 m is kept
Flow velocity 0.15 m to 0.3 m/sec is kept
One minute of detention period is kept
All of these

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