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Environmental Engineering

Environmental Engineering
The design discharge for the separate sewer system shall be taken as

2 × DWF
Equal to dry weather flow (DWF)
6 × DWF
3 × DWF

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Environmental Engineering
Sewerage system is usually designed for

25 years
28 years
27 years
26 years

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Environmental Engineering
The gas from sludge digestion tank is mainly composed of

Methane
Carbon dioxide
Hydrogen sulphide
Nitrogen

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Environmental Engineering
Facultative bacteria are able to work in

Presence of oxygen only
Presence of water
Absence of oxygen only
Presence as well as in absence of oxygen

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Environmental Engineering
Which of the following is not a water borne disease?

Cholera
Dysentery
Malaria
Typhoid

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Environmental Engineering
The layout of distribution system in which water flows towards the outer periphery is

Radial system
Ring system
Dead end system
Grid iron system

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