Home

Primary air is the air used to

A. Provide air around burners for obtaining optimum combustion

B. Transport and dry the coal

C. Convert CO (formed in lower zone of furnace) into CO₂ at higher zone

D. Air delivered by forced draft fan

Related Questions

  1. The clearance in the engine cylinder
  2. The number of flue tubes in Lancashire boiler is
  3. The amount of water evaporated from feed water at _________ into dry and saturated steam at 100°…
  4. On Mollier chart, free expansion, or throttling process from high pressure to atmosphere is represented…
  5. The size of a boiler drum in pulverised fuel fired boiler, as its size and capacity, (steam pressure…
  6. The major axis of elliptical manholes on the shell should be provided
  7. A safety valve in a locomotive starts leaking. The leaking medium will be
  8. The high pressure and low pressure cylinders in a receiver type compound engine are regarded as having…
  9. The action of steam in a steam turbine is
  10. The best suited coal for chain or travelling grate stoker boiler is
  11. A condenser in a steam power plant
  12. For the same diameter and thickness of tube, a water tube boiler has ________ heating surface as compared…
  13. The efficiency of an impulse turbine is maximum when (where Vb = Blade speed, V = Absolute velocity…
  14. The diameter of flue tube in a Cornish boiler is _________ that of the shell.
  15. The ratio of the clearance volume to the swept volume is called
  16. O₂ content in atmospheric air on weight basis is
  17. Cut-off governing as compared to throttle governing is
  18. Presence of moisture in fuel oil would
  19. Rateau turbine is
  20. The ratio of the useful heat drop to the isentropic heat drop is called
  21. Adiabatic process is
  22. In an impulse turbine
  23. Green coal, in order to be burnt, must be
  24. The diameter of superheated tubes in a locomotive boiler is
  25. Reheating of steam in a turbine
  26. The maximum efficiency of a De-Laval turbine is (where α = Nozzle angle)
  27. The maximum steam pressure in a Locomotive boiler is limited to
  28. In turbines, the fluid undergoes a continuous steady flow process and the speed of flow is
  29. The number of water level indicators in a boiler are generally _________ in number.
  30. The water tubes in a simple vertical boiler are

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