question_answer

Given: \[{{\eta }_{s}}=\] Stage efficiency, \[{{\eta }_{n}}=\] Nozzle efficiency, \[{{\eta }_{s}}=\] Blade efficiency, Which one of the following is correct?

A) \[{{\eta }_{n}}={{\eta }_{b}}={{\eta }_{s}}\]             

B) \[{{\eta }_{b}}={{\eta }_{s}}{{\eta }_{n}}\]

C) \[{{\eta }_{s}}\times {{\eta }_{n}}\times {{\eta }_{s}}=1\]        

D) \[{{\eta }_{s}}={{\eta }_{s}}{{\eta }_{n}}\]