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Q8) a) Explain the difference between impulse and reaction turbines. (1)

(b) In a 50% reaction turbine stage, the steam leaves the fixed blades with a velocity of 300 m/s. The axial velocity component is 145 m/s and the blade velocity is 200 m/s.

Determine EACH of the following:

(i) The blade inlet and outlet angles; (7)

(ii) The blade work per kg of steam; (4)

(iii) The diagram efficiency. (4)