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

Circle method
Equivalent pipe method
Electrical analysis method
Hardy cross method

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Environmental Engineering
Scour valves are provided

At every depression and dead ends to drain out the waste water that may collect there
At street corners to control the flow of water
At the foot of rising main along the slope to prevent back running of water
At every summit of rising mains

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Environmental Engineering
The polluted water is one which

Consists of undesirable substances rendering it unfit for drinking and domestic use
Is safe and suitable for drinking and domestic use
Is contaminated
Contains pathogenic bacteria

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