The relative efficiency is defined as the

A. Ratio of thermal efficiency to Rankine efficiency

B. Ratio of brake power to the indicated power

C. Ratio of heat equivalent to indicated power to the energy supplied in steam

D. Product of thermal efficiency and Rankine efficiency

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  1. Pick up the correct statement as regards Cornish boiler and Lancashire boiler
  2. The crown of the fire box is made hemispherical in order to
  3. The air pressure at the fuel bed is reduced below that of atmosphere by means of a fan placed at or…
  4. The radius of a dished head is taken approximately as
  5. Secondary air is the air used to
  6. A safety valve in a locomotive starts leaking. The leaking medium will be
  7. The pressure of steam in the engine cylinder at the beginning of the stroke is ________ the boiler pressure.
  8. Water tube boilers are
  9. Lancashire boiler is used where working pressure and power required are
  10. On Mollier chart, free expansion, or throttling process from high pressure to atmosphere is represented…
  11. The amount of water evaporated in kg per kg of fuel burnt is called
  12. Reheating of steam under ideal conditions takes place at constant
  13. In order to obtain superheated steam, a superheater is added in an existing boiler. As as result, furnace…
  14. There is always some steam left in the clearance space from the previous stroke. This steam left in…
  15. The steam leaves the nozzle at a
  16. The difference of supersaturated temperature and saturation temperature at that pressure is called
  17. Which of the following is a fire tube boiler?
  18. The safety valve at superheater as compared to drum safety valve setting is set at
  19. 100% efficiency of a thermal cycle cannot be achieved because of
  20. In recuperative air preheaters, the heat is transferred
  21. The function of injector used in small steam plants is to
  22. The effect of bleeding is that
  23. All steam engines work on
  24. The high steam and low water safety valve is not used in
  25. The high pressure and low pressure cylinders in a Woolf type compound engine are regarded as having…
  26. In a glass tube type water indicator for a boiler, one end of the tube is connected to water space and…
  27. The theoretical indicator diagram of a simple steam engine is based upon the assumption that
  28. Degree of reaction is defined as the ratio of
  29. The velocity of flue gases (V) through the chimney under a static draught of (H') metres is given by
  30. The specific heat of superheated steam in kcal/kg is generally of the order of