The economiser is used in boilers to

A. Increase thermal efficiency of boiler

B. Economise on fuel

C. Extract heat from the exhaust flue gases

D. Increase flue gas temperature

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  1. Expansion ratio is the ratio of
  2. Tertiary air is the air used to
  3. The safety valve on boiler drum compared to safety valve on superheater is set at
  4. Water and sediment in fuel oil can be removed by
  5. The isentropic enthalpy drop in moving blade is two-third of the isentropic enthalpy drop in fixed blades…
  6. The function of a piston in a steam engine is
  7. One kg of steam sample contains 0.8 kg dry steam; Its dryness fraction is
  8. The equivalent evaporation is defined as
  9. The size of a boiler drum in pulverised fuel fired boiler, as its size and capacity, (steam pressure…
  10. Which of the following is correct? (Where pa = Actual mean effective pressure, pm = Theoretical mean…
  11. When the circulation of water, in a boiler, is by convection currents which are set up during the heating…
  12. The indicated thermal efficiency is defined as the
  13. In a uniflow engine
  14. In a reaction turbine, when steam flows through the fixed blades,
  15. Coke is produced by
  16. The diameter of Cornish boiler varies from
  17. In an impulse turbine
  18. If a steam sample is nearly in dry condition, then its dryness fraction can be most accurately determined…
  19. The ratio of the energy required to produce the artificial draught (expressed in metres head or J/kg…
  20. The diagram factor is the ratio of the
  21. Carbonisation of coal is the process of
  22. Boiler H.P. is defined as the
  23. The condition of steam in boiler drum is always
  24. The pressure at which latent heat of vaporisation of water is zero, is
  25. Vacuum for reciprocating steam engines compared to steam turbines is
  26. Heating of dry steam above saturation temperature is known as
  27. The steam temperature with increase in load in case of a boiler fitted with radiation superheater
  28. A condenser in a steam power plant
  29. Which device is used in thermal power plants to reduce level of pollution?
  30. Film boiling occurs at