GAT Subject
Engineering
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23. | The efficiency of an impulse turbine is maximum when (where Vb = Blade speed, V = Absolute velocity of steam entering the blade, and ? = Nozzle angle) | |
A. | Vb = 0.5 V cos ? | |
B. | Vb = V cos ? | |
C. | Vb = 0.5 V2 cos ? | |
D. | Vb = V2 cos? | |