Hydraulics and Fluid Mechanics in ME
A glass tube of smaller diameter is used while performing an experiment for the capillary rise of water because

It is easier to see through the glass tube
All of these
It is not possible to conduct this experiment with any other tube
Glass tube is cheaper than a metallic tube

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Hydraulics and Fluid Mechanics in ME
In case of flow through parallel pipes,

Both (A) and (B)
The head loss for all the pipes is same
The total discharge is equal to the sum of discharges in the various pipes
The total head loss is the sum of head losses in the various pipes

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