Home

In a boiler, feed water supplied per hour is 205 kg while coal fired per hour is 23 kg. The net enthalpy rise per kg of water is 145 kJ. If the calorific valve of the coal is 2050 kJ/kg, then the boiler efficiency will be

A. 56 %

B. 63 %

C. 74 %

D. 78 %

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

You can do it
  1. The blade friction in the impulse turbine reduces the velocity of steam by __________ while it passes…
  2. The critical pressure gives the velocity of steam at the throat
  3. The reheat factor depends upon
  4. Which of the following statement is correct?
  5. The fire tubes in a Locomotive boiler has _________ diameter.
  6. Cut-off governing as compared to throttle governing is
  7. Steam turbines are used for
  8. An economiser in a boiler
  9. Which of the following boiler works on a forced circulation of water?
  10. De-Laval turbine is a
  11. The amount of water evaporated in kg per kg of fuel burnt is called
  12. Which of the following statement is wrong?
  13. Which of the following gases has the highest calorific value?
  14. In water tube boilers
  15. Water tube boilers are
  16. The efficiency of reaction turbine is maximum when (where α = Angle made by the absolute velocity…
  17. The height of chimney in a power plant is governed by
  18. On Mollier chart, flow through turbine is represented by
  19. The purpose of governing in steam turbines is to
  20. An economiser _________ the steam raising capacity of a boiler.
  21. Which is not the correct statement about moisture in coal?
  22. The feed check valve is used in order to
  23. The compounding of turbines is done in order to
  24. The ratio of the workdone on the blades per kg of steam to the total energy supplied per stage per kg…
  25. In a steam engine, superheated steam from the boiler is fed into the steam chest at a pressure of
  26. The pressure at which latent heat of vaporisation of water is zero, is
  27. 100% efficiency of a thermal cycle cannot be achieved because of
  28. The diagram efficiency is the ratio of
  29. A packaged boiler is one in which various parts like firing equipment, fans, feed pumps and automatic…
  30. Steam engine operates on