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 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.

Please do not use chat terms. Example: avoid using "grt" instead of "great".

You can do it
  1. When the back pressure of a nozzle is below the designed value of pressure at exit of nozzle, the nozzle…
  2. The behaviour of coal in a furnace is determined by
  3. Which of the following statement indicates the difference between Cornish boiler and Lancashire boiler?
  4. Lancashire boiler is
  5. In water wall furnace, the heat is transferred to the water walls by
  6. Water and sediment in fuel oil can be removed by
  7. The ratio of total useful heat drop to the total isentropic heat drop, is called
  8. The pressure compounded impulse turbine as compared to velocity compounded turbine require __________…
  9. The steam leaves the nozzle at a
  10. In a compound steam engine, the first stage of expansion is carried out in a high pressure cylinder…
  11. Water tube boilers are
  12. The height of chimney in a power plant is governed by
  13. Willians line follows the law (where b = A constant representing the shape of the Willians line, a =…
  14. In a reaction turbine
  15. Alkaline pyrogallate is used in Orsat's apparatus for absorption of
  16. Cochran boiler is a
  17. Lancashire boiler has __________ internal flue tubes.
  18. The fire tubes in a Cochran boiler are
  19. The high steam and low water safety valve is not used in
  20. The object of producing draught in a boiler is
  21. The stage efficiency (ηS) is given by (where ηB = Blading efficiency, and ηN = Nozzle…
  22. The shell diameter of a Locomotive boiler is
  23. The shell diameter and length of locomotive boiler are
  24. The critical pressure ratio for initially superheated steam is __________ as compared to initially dry…
  25. An ideal regenerative cycle is
  26. The maximum steam pressure in a Locomotive boiler is limited to
  27. The latent heat of steam with increase of pressure
  28. The ratio of the temperature rise of cooling water to the vacuum temperature minus inlet cooling water…
  29. In a 50% reaction turbine stage, tangential component of absolute velocity at rotor inlet is 537 m/s…
  30. The fire tubes in a Cochran boiler usually have _________ diameter.