Question

The following data pertain to a single stage impulse steam turbine:                                              

Nozzle angle = 20⁰;

Blade velocity = 20 m/s;

Relative steam velocity at entry = 350 m/s;

Blade inlet angle = 30⁰

Blade exit angle = 25⁰.

If blade friction is neglected the work done per kg steam is

      (a) 124 kJ                                                           (b) 164 kJ

      (c) 169 kJ                                                           (d) 174 kJ