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Steam Nozzles and Turbines - Engineering

Q1:

Which of the following statement is wrong?

A The critical pressure gives the velocity of steam at the throat equal to the velocity of sound.

B The flowin the convergent portion of the nozzle is sub-sonic.

C The flow in the divergent portion of the nozzle is super-sonic.

D To increase the velocity of steam above sonic velocity (super-sonic) by expanding steam below the critical pressure, the divergent portion for the nozzle is not necessary.

ANS:D - To increase the velocity of steam above sonic velocity (super-sonic) by expanding steam below the critical pressure, the divergent portion for the nozzle is not necessary.

Explanation: No answer description is available.