The specific speed of the pump and turbine respectively are given as
1
\(\frac{{N\sqrt P }}{{{H^{\frac{5}{4}}}}},\frac{{N\sqrt Q }}{{{H^{\frac{3}{4}}}}}\)
2
\(\frac{{N\sqrt Q }}{{{H^{\frac{3}{4}}}}},\frac{{N\sqrt P }}{{{H^{\frac{5}{4}}}}}\)
3
\(\frac{{N\sqrt P }}{{{H^{\frac{3}{4}}}}},\frac{{N\sqrt Q }}{{{H^{\frac{5}{4}}}}}\)
4
\(\frac{{N\sqrt Q }}{{{H^{\frac{5}{4}}}}},\frac{{N\sqrt P }}{{{H^{\frac{3}{4}}}}}\)