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Calorific value of coal is of the order of

A. 200-400 kcal/ kg

B. 800-1200 kcal/ kg

C. 2000-4000 kcal/ kg

D. 5000-8000 kcal/ kg

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  1. The ratio of heat utilised to produce steam and the heat liberated in furnace is known as
  2. The ratio of the isentropic heat drop to the heat supplied, is called
  3. The capacity of induced draft fan compared to forced draft fan in a boiler is
  4. The chimney draught varies with
  5. Reheating of steam in a turbine
  6. The equivalent evaporation is defined as
  7. Which type of boiler can meet rapid changes of load?
  8. Fire tube boilers are limited to a maximum working pressure of
  9. Cut-off governing as compared to throttle governing is
  10. The fire tubes in a Scotch marine boiler are
  11. Presence of moisture in fuel oil would
  12. The dry saturated steam at very low pressure, (510 kg/cm²) when throttled to atmosphere will become
  13. The velocity of flue gases (V) through the chimney under a static draught of (H') metres is given by
  14. With increase in load, convection superheater has
  15. If partial pressure of air and steam be pa and ps respectively in a condenser, then according to Dalton's…
  16. Reheating of steam under ideal conditions takes place at constant
  17. The steam enters the nozzle at a
  18. The function of a crosshead is to guide motion of the _________ and to prevent it from bending.
  19. At which pressure the properties of water and steam become identical
  20. De-Laval turbines are mostly used
  21. Which of the following substance will have same percentage in both proximate and ultimate analysis?
  22. The diameter of superheated tubes in a locomotive boiler is
  23. When the nozzle operates with the maximum mass flow, the nozzle is said to be
  24. The relative heat absorption for successively added equal areas of boiler convection heating surfaces
  25. The ratio of the useful heat drop to the isentropic heat drop is called
  26. The purpose of governing in steam turbines is to
  27. A safety valve mainly used with locomotive and marine boilers is
  28. At critical point, i.e. p = 225.65 kg/cm², the latent enthalpy of vaporisation is
  29. The equivalent evaporation of a boiler is a measure to compare
  30. The length of Cornish boiler varies from