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Question
Which of the following statement is wrong?
Options:
A .  The critical pressure gives the velocity of steam at the throat equal to the velocity of sound
B .  The flow in the convergent portion of the nozzle is subsonic
C .  The flow in the divergent portion of the nozzle is supersonic
D .  To increase the velocity of steam above sonic velocity (supersonic) by expanding steam below the critical pressure, the divergent portion for the nozzle is not necessary
Answer: Option D
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