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Environmental Engineering

Environmental Engineering
The chemical most commonly used to increase speed of sedimentation of sewage is

Lime
Sodium permanganate
Copper sulphate
Sulphuric acid

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Environmental Engineering
The pathogens can be killed by

Oxidation
Chlorination
None of these
Nitrification

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Environmental Engineering
Which of the following methods of analysis of water distribution system is most suitable for long and narrow pipe system?

Equivalent pipe method
Hardy cross method
Electrical analysis method
Circle method

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Environmental Engineering
The type of valve which allows water to flow in one direction but prevents its flow in the reverse direction is

Reflux valve
Sluice valve
Air relief valve
Pressure relief valve

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Environmental Engineering
Facultative bacteria are able to work in

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

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Environmental Engineering
The suitable layout of a distribution system for irregularly growing town is

Ring system
Dead end system
Grid iron system
Radial system

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