An economiser in a boiler

A. Increases steam pressure

B. Increases steam flow

C. Decreases fuel consumption

D. Decreases steam pressure

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  1. The numbers of fire tubes in a Cochran boiler are
  2. The draught (in mm of water), for maximum discharge of flue gases through the chimney, is given by (where…
  3. In order to compare the capacity of boilers, the feed water temperature and working pressure are taken…
  4. The high steam and low water safety valve is not used in
  5. In a reaction turbine, when steam flows through the fixed blades,
  6. Duplex feed pumps are used in small steam boilers. These operate on the principle of
  7. The effect of friction in the nozzle __________ dryness fraction of steam.
  8. In case of condensing steam engines, the pressure of steam in the cylinder during exhaust stroke is…
  9. When the speed of the crankshaft is between 100 r.p.m. and 250 r.p.m., the engine said to be a
  10. Lancashire boiler is used where working pressure and power required are
  11. Clearance ratio is the ratio of
  12. Thermal equilibrium means that the flow of steam is
  13. Locomotive type' boiler is
  14. Stage efficiency is also known as
  15. The specific volume of steam with increase in pressure decreases
  16. Which of the following gases has the highest calorific value?
  17. Which of the following statement is wrong?
  18. The device attached to the steam chest for preventing explosions due to excessive internal pressure…
  19. The ratio of the volume at cut-off to the swept volume is called
  20. An economiser _________ the steam raising capacity of a boiler.
  21. Which of the following varieties of coals is mostly used in steam boilers?
  22. The critical pressure ratio for initially dry saturated steam is
  23. Which of the following boilers is best suited to meet fluctuating demands?
  24. The factor of evaporation for all boilers is always
  25. Which is not the correct statement about moisture in coal?
  26. In water tube boilers
  27. The feed check valve is used in order to
  28. The diameter of internal flue tubes in a Lancashire boiler compared to its shell is
  29. The critical pressure ratio for initially wet steam is
  30. In a De-Laval nozzle expanding superheated steam from 10 bar to 0.1 bar, the pressure at the minimum…