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Waste Water Engineering

Waste Water Engineering
In circular sewers if depth of flow is 0.2 times the full depth, the nominal gradient,

Is trebled
Is only provided
Is doubled
Is not enough

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Waste Water Engineering
Design period of 40 to 50 years is adopted for

Main sewers
Branch sewers
All listed here
Trunk sewers

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Waste Water Engineering
In sewage having fully oxidised organic matter, the nitrogen exists in the form of

Nitrites
Free ammonia
Nitrates
Aluminoid nitrogen

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Waste Water Engineering
The rate of accumulation of sludge in septic tanks is recommended as

25 litres/person/month
30 litres/person/year
30 litres/person/month
25 litres/person/year

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Waste Water Engineering
The quantity of liquid waste which flows in sewers during the period of rainfall, is known

Storm sewage
Sanitary sewage
None of these
Industrial waste

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

Over flow velocity
All of these
Surface loading
Over flow rate

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