A Pelton wheel is running at 2000 r.p.m. and it develops 68.67 kW shaft power. The discharge through a nozzle is 0.02 m3/s and the net head on the Pelton wheel is 500 m. The overall efficiency of the Pelton wheel is

A Pelton wheel is running at 2000 r.p.m. and it develops 68.67 kW shaf

1.	A Pelton wheel is running at 2000 r.p.m. and it develops 68.67 kW shaft power. The discharge through a nozzle is 0.02 m3/s and the net head on the Pelton wheel is 500 m. The overall efficiency of the Pelton wheel is
A.	0.45
B.	0.5
C.	0.7
D.	0.9
Answer» D. 0.9