Hydraulics and Fluid Mechanics in ME
The centrifugal pump preferred for a specific speed between 80 to 160 r.p.m. is

Medium speed with radial flow at outlet
High speed with radial flow at outlet
Slow speed with radial flow at outlet
High speed with mixed flow at outlet

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Hydraulics and Fluid Mechanics in ME
The overall efficiency of a reaction turbine is the ratio of

Work-done on the wheel to the energy (or head of water) actually supplied to the turbine
Power produced by the turbine to the energy actually supplied by the turbine
Actual work available at the turbine to the energy imparted to the wheel
None of these

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