In the velocity diagram shown below, u = blade velocity,

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In the velocity diagram shown below, u = blade velocity, C = absolute fluid velocity and W = relative velocity of fluid and the subscripts 1 and 2 refer to inlet and outlet. This diagram is for

1. an impulse turbine
2. a reaction turbine
3. a centrifugal compressor
4. an axial flow compressor

Correct Option: B

As u₁ = u₂ and w₂ > > w₁