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The relation between hydraulic efficiency ($${\eta _{\text{h}}}$$), mechanical efficiency ($${\eta _{\text{m}}}$$) and overall efficiency ($${\eta _{\text{o}}}$$) is

The relation between hydraulic efficiency ($${\eta _{\text{h}}}$$), mechanical efficiency ($${\eta _{\text{m}}}$$) and overall efficiency ($${\eta _{\text{o}}}$$) is Correct Answer $${\eta _{\text{o}}} = {\eta _{\text{h}}} \times {\eta _{\text{m}}}$$

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The stage efficiency ($${\eta _{\text{S}}}$$) is given by (where $${\eta _{\text{B}}}$$ = Blading efficiency and $${\eta _{\text{N}}}$$ = Nozzle efficiency)
The relation between hydraulic efficiency (ηh), mechanical efficiency (ηm) and overall efficiency (ηo) is
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