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
Pressure relief valve
Air relief valve

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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

Both A and R is true and R is the correct explanation of A
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

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