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Question

In
a Parson's turbine stage, blade velocity is 320 m/s at the mean radius
and rotor blade exit angle is `30^circ``For minimum kinetic energy of the
steam leaving the stage, the steam velocity at the exit of the rotor
will be 


Options:
A .  `160//sqrt(3) m//s`
B .  `320//sqrt(3) m//s`
C .  `640//sqrt(3) m//s`
D .  640 m/s
Answer: Option C



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