Fluid Mechanics
While starting a centrifugal pump, its delivery valve should be kept

Opened
Either opened or closed ; it does not make any difference
Either opened or closed; depending on the fluid viscosity
Closed

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Fluid Mechanics
Select the wrong statement pertaining to flow of an incompressible fluid through a venturimeter.

For frictionless flow, the fluid pressure entering the venturi meter will be exactly equal to that leaving the venturimeter
Venturimeter occupies less space than an orificemeter
Venturimeter incurs less power loss compared to an equivalent orificemeter
Discharge of fluid through a venturimeter depends upon the gage difference irrespective of the orientation of venturimeter

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