Use of economiser in a boiler plant reduces the fuel consumption for steam generation by about __________ percent.

A. 1

B. 10

C. 30

D. 50

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

You can do it
  1. Softening of hardened steel is done by its
  2. Pick out the wrong conversion of absolute & kinematic viscosities.
  3. The approximate height of a blast furnace having a useful volume of 2000 m3 is about __________ metres
  4. Water hammer is caused in steam carrying pipelines, because of
  5. Consider an ideal solution of components A and B. The entropy of mixing per mole of an alloy containing…
  6. What is the critical radius of insulation (cms) for a metallic cylinder, if the convective heat transfer…
  7. Methyl orange indicator turns
  8. Tesla metre per ampere (T. m/A) is the unit for the measurement of
  9. Which of the following is an undesirable property of slag produced during the Pyrometallurgical method…
  10. In chemical dehumidification of air
  11. Normalising does not __________ of a metal.
  12. Upto the critical radius of insulation, added insulation, will
  13. at 1173E; at equilibrium, what will be the number of moles of CO gas required to reduce one mole of…
  14. Eutectic reaction for iron-carbon system occurs at a temperature of __________ °C.
  15. The heat released by cooling one mole of copper from 400 K to room temperature (300 K) is (assume :…
  16. __________ is not a case hardening process.
  17. Plasma is
  18. Volume of blast furnace slag is about __________ times the volume of hot metal (pig iron) of the same…
  19. The trace metal present in insulin is
  20. Angular displacement can be measured suitably by a
  21. Tumbling is the process of improving the __________ of the materials/parts.
  22. Baffles provided on the shell side of a shell and tube heat exchanger are meant for
  23. Steel balls are manufactured by
  24. According to thermodynamic Fahrenheit scale, the fundamental interval between ice point to steam point…
  25. Cupola produces __________ iron.
  26. Sudden fall of atmospheric pressure by a large amount is an indication of the
  27. Wrought iron is never shaped by
  28. Multistage compression of air as compared to single stage compression offers the advantage of
  29. Fibrous fracture is normally encountered in the __________ materials.
  30. Pick out the wrong statement.