Environmental Engineering
Assertion A: The consumption of water increases with increase in the distribution pressure.Reason R: Higher distribution pressure causes more loss and waste of waterSelect your answer according to the coding system given below

A is true but R is false
A is false but R is true
Both A and R is true but R is not the correct explanation of A
Both A and R is true and R is the correct explanation of A

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Environmental Engineering
The major disadvantage of lime soda process of water softening is that

Huge amount of precipitate is formed which creates a disposal problem
It is unsuitable for turbid and acidic water
It is unsuitable for softening the water of excessive hardness
The effluent cannot be reduced to zero hardness

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Environmental Engineering
Scour valves are provided

At every summit of rising mains
At the foot of rising main along the slope to prevent back running of water
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

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