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Environmental Engineering

Environmental Engineering
The pathogens can be killed by

Nitrification
Chlorination
Oxidation
None of these

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Environmental Engineering
The type of valve which is provided to control the flow of water in the distribution system at street corners and where the pipe lines intersect is

Sluice valve
Safety valve
Scour valve
Check valve

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Environmental Engineering
The maximum discharge of a tube well is about

500 liters/sec
1000 liters/sec
50 liters/sec
5 liters/sec

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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?

Hardy cross method
Electrical analysis method
Circle method
Equivalent pipe method

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Environmental Engineering
The distribution mains are designed for

Maximum hourly demand
Maximum hourly demand on maximum day
Average daily demand
Maximum daily demand

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Environmental Engineering
The effective size of sand particles used in slow sand filters is

0.60 to 1.00 mm
0.35 to 0.60 mm
1.00 to 1.80 mm
0.25 to 0.35 mm

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