Home

The stage efficiency (ηS) is given by (where ηB = Blading efficiency, and ηN = Nozzle efficiency)

A. ηS = ηB × ηN

B. ηS = ηB / ηN

C. ηS = ηN / ηB

D. None of these

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

You can do it
  1. A safety valve mainly used with locomotive and marine boilers is
  2. For water, at pressures below atmospheric;
  3. The air pressure at the fuel bed is reduced below that of atmosphere by means of a fan placed at or…
  4. In an impulse turbine, steam expands
  5. The aim of a compound steam engine is
  6. A single stage impulse turbine with a diameter of 1.2 m runs at 3000 r.p.m. If the blade speed ratio…
  7. In order to reduce the rotor speed of an impulse turbine, the method employed is
  8. The cylinder dimensions of a compound engine may be designed on the basis of
  9. Fire tube boilers are those in which
  10. The device attached to the steam chest for preventing explosions due to excessive internal pressure…
  11. The velocity of steam at throat of the nozzle is __________ the velocity of sound.
  12. Thermal efficiency of well maintained boiler will be of the order
  13. A device used to increase the temperature of saturated steam without raising its pressure, is called
  14. A condenser where circulating water flows through tubes which are surrounded by steam, in known as
  15. The radius of a dished head is taken approximately as
  16. The behaviour of coal in a furnace is determined by
  17. Gusset stays in a boiler are provided to
  18. An economiser is generally placed between
  19. Fire tube boilers are
  20. Incomplete combustion can be best judged by
  21. De-Laval turbines are mostly used
  22. In natural circulation type boiler,
  23. The length of shell of a Locomotive boiler is
  24. The diameter of Cornish boiler is of the order of
  25. 100% efficiency of a thermal cycle cannot be achieved because of
  26. The diagram factor is the ratio of the
  27. In a boiler, feed water supplied per hour is 205 kg while coal fired per hour is 23 kg. The net enthalpy…
  28. The crown of the fire box is made hemispherical in order to
  29. Efficiency of Rankine cycle can be increased by
  30. The pressure of feed water has to be raised before its entry into the boiler. The pressure is raised…