If N is the RPM of the full scale turbine, then the RPM of the model will be

Question

A model of a hydraulic turbine is tested at a head of ¼^th of that under which the full scale turbine works. The diameter of the model is half of that of the full scale turbine. If N is the RPM of the full scale turbine, then the RPM of the model will be                                                           

      (a) N/4                                                                (b) N/2

      (c) N                                                                   (d) 2N

Answer 1

Here is the answer!