123) Stage efficiency is also known as

124) A single stage turbine is not used because it requires large reduction gearing due to very high rotational speed.

125) In turbines, the fluid undergoes a continuous steady flow process and the speed of flow is

126) A nozzle is said to be a convergent-divergent nozzle, when the cross-section of a nozzle first decreases from its entrance to throat and then increases from its throat to exit.

127) In an impulse reaction turbine, the pressure drops gradually and continuously over