The head available to both the Francis turbines A and B is 80. m. The mean atmospheric pressure is 101.043 kPa and the vapour pressure for water is 2.943 kPa. The height of the runner of turbine A above the tail water level is 0.5 m and for turbine B it is 0.6 m. If the critical cavitation factor is 0.1144, then which one of the following, statements is only correct?
1
Cavitation does not occur in any of the turbines.
2
Cavitation occurs in both the turbines.
3
Cavitation occurs only in turbine A.
4
Cavitation occurs only in turbine B.