Hydraulics and Fluid Mechanics in ME
Manometric head, in case of a centrifugal pump, is equal to

Work-done per kN of water Losses within the impeller
Energy per kN at outlet of impeller Energy per kN at inlet of impeller
Suction lift + Loss of head in suction pipe due to friction + Delivery lift + Loss of head in delivery pipe due to friction + Velocity head in the delivery pipe
All of these

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Hydraulics and Fluid Mechanics in ME
A piece of metal of specific gravity 13.6 is placed in mercury of specific gravity 13.6, what fraction of it volume is under mercury?

The metal piece will simply float over the mercury
Metal piece will sink to the bottom
The metal piece will be immersed in mercury by half
Whole of the metal piece will be immersed with its top surface just at mercury level

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Hydraulics and Fluid Mechanics in ME
For similarity, in addition to models being geometrically similar to prototype, the following in both cases should also be equal

ratio of inertial force to force due to surface tension
ratio of inertial force to force due to gravitation
all the four ratios of inertial force to force due to viscosity, gravitation, surface tension, and elasticity
ratio of inertial force to force due to viscosity

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Hydraulics and Fluid Mechanics in ME
Discharge of a centrifugal pump is

Inversely proportional to (diameter)² of its impeller
Inversely proportional to diameter of its impeller
Directly proportional to (diameter)² of its impeller
Directly proportional to diameter of its impeller

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