Hydraulics and Fluid Mechanics in ME
Alcohol is used in manometers because

It can provide longer column due to low density
It has low surface tension
It is clearly visible
It has low vapour pressure

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Hydraulics and Fluid Mechanics in ME
The purpose of a surge tank is

To control the pressure variations due to rapid changes in the pipe line flow
All of these
To eliminate water hammer possibilities
To regulate flow of water to turbines by providing necessary retarding head of water

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