1.

The stage efficiency (ηS) is given by (where ηB = Blading efficiency, and ηN = Nozzle efficiency)

A. ηS = ηB × ηN
B. ηS = ηB / ηN
C. ηS = ηN / ηB
D. None of these
Answer» B. ηS = ηB / ηN


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