Secondary 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 induced draft fan

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

You can do it
  1. Vacuum for reciprocating steam engines compared to steam turbines is
  2. A compound steam engine in which the high pressure and low pressure cylinders have common piston rod,…
  3. The relative heat absorption for successively added equal areas of boiler convection heating surfaces
  4. Cut-off ratio is the ratio of
  5. A condenser in a steam power plant
  6. The radius of a dished head is taken approximately as
  7. In a throttling process
  8. In water wall furnace, the heat is transferred to the water walls by
  9. A safety valve in a locomotive starts leaking. The leaking medium will be
  10. In water tube boilers
  11. The function of injector used in small capacity boilers is to
  12. Proximate analysis of fuel is determination of percentage of
  13. In a De-Laval nozzle expanding superheated steam from 10 bar to 0.1 bar, the pressure at the minimum…
  14. By compounding the expansion of steam in two or more cylinders, the ratio of expansion
  15. The diameter of Cornish boiler is of the order of
  16. Which of the following statement is wrong?
  17. A turbine is said to have an axial discharge when the steam leaves the blade tip at _________ to the…
  18. The actual power supplied by the engine crankshaft is called
  19. An ideal regenerative cycle is
  20. The height of chimney in a power plant is governed by
  21. Parson's reaction turbine is a __________ reaction turbine.
  22. Size of boiler tubes is specified by
  23. Which of the following is correct? (Where pa = Actual mean effective pressure, pm = Theoretical mean…
  24. Willian's law states that the steam consumption per hour provided with a throttled governor is proportional…
  25. O₂ content in atmospheric air on volume basis is
  26. The maximum heat loss is a boiler occurs due to
  27. Fusible plug for boilers is made of fusible metal containing tin, lead, and
  28. When steam after doing work in the cylinder passes into a condenser, the engine is said to be a
  29. Lancashire boiler is
  30. The relative efficiency is defined as the