Question

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.

Answer 1

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.

Answer 2

Option D is the wrong statement.........