# Mechanical Engineering - Steam Nozzles and Turbines - Discussion

### Discussion :: Steam Nozzles and Turbines - Section 3 (Q.No.3)

3.

In a 50% reaction turbine stage, tangential component of absolute velocity at rotor inlet is 537 m/s and the blade velocity is 454 m/s. The power output in kW of steam will be

 [A]. 260 kW [B]. 282 kW [C]. 296 kW [D]. 302 kW

Explanation:

No answer description available for this question.

 Ganesh said: (Oct 3, 2013) 50% reaction turbine there is one formula, Work done = Vb (2V1cos alpha-vb)/(1000). Substitute and we can get it 454/1000(2*537-434) = 282.

 Engr Arshad Jamali said: (Dec 4, 2016) I think this can be obtained from velocity triangle method.

 V Bhanu said: (Feb 6, 2017) For 50% reaction turbine; Workdone = Vb (2V1cos α-vb)/(1000). Substitute it 454/1000(2 * 537 - 454) = 282.

 Maharaja said: (Jul 29, 2017) Work done = [454(2 * 537 - 454)]/1000 = 282.

 Anjana Yadav said: (Jun 10, 2018) What is the value of cos α?

 Jitesh said: (Jan 14, 2019) Tangential component is given so for absolute it is cos component.

 .Bilal said: (Jan 11, 2020) What is the value of alpha here?

 Pankaj said: (Mar 7, 2020) The component v1 cos-alpha is equal to absolute velocity along the component that is 537.