122) The stage efficiency is the ratio of energy supplied to the blades per kg of steam to the total energy supplied per stage per kg of steam.

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.