In regenerative air preheaters, the heat is transferred

A. From a metal wall from one medium to another

B. From heating an intermediate material and then heating the air from this material

C. By direct mixing

D. Heat is transferred by bleeding some gas from furnace

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  1. A regenerative steam cycle renders
  2. At very low temperature, the melting and boiling temperatures become equal. This temperature is
  3. The velocity of steam leaving the nozzle (V) is given by (where K = Nozzle coefficient or nozzle efficiency,…
  4. The ratio of the actual vacuum to the ideal vacuum in a condenser is called
  5. The principal function of a stop valve is to
  6. When steam after doing work in the cylinder passes into a condenser, the engine is said to be a
  7. O₂ content in atmospheric air on volume basis is
  8. The function of a safety valve is
  9. The Locomotive boiler has
  10. The working pressure range for a LaMont boiler is
  11. Steam exhaust from high pressure turbine is reheated in
  12. Which of the following statement is correct?
  13. Which of the following statement is correct for steam turbines as compared to reciprocating steam engines?
  14. Presence of moisture in fuel oil would
  15. In a uniflow engine
  16. The shell diameter of a Locomotive boiler is
  17. The reheat factor depends upon
  18. The diameter of superheated tubes in a locomotive boiler is
  19. The ratio of heat equivalent to brake power to the energy supplied in steam is known as
  20. Water boils when its vapour pressure
  21. Which of the following is a water tube boiler?
  22. The critical pressure ratio is given by (where p₁ = Initial pressure of steam, and p₂…
  23. Mechanical equivalent of heat for 1 kcal or Joule's equivalent is equal to
  24. Which of the following varieties of coals is mostly used in steam boilers?
  25. De-Laval turbine is a
  26. The heat loss in a boiler takes place in the form of
  27. De-Laval turbines are mostly used
  28. The main object of a boiler trial is
  29. Which of the following statement is correct?
  30. The maximum discharge through a chimney occurs when the height of chimney is