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During storage, the heating value of coal

A. Increases

B. Decreases

C. Remain constant

D. May increase or decrease depending upon the method of storage

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  1. The high pressure boiler is one, which produces steam at a pressure more than
  2. The ratio of heat actually used in producing the steam to the heat liberated in the furnace, is known…
  3. In a single acting steam engine
  4. Which of the following statement is correct?
  5. In a steam engine, superheated steam from the boiler is fed into the steam chest at a pressure of
  6. Hard coke is produced by carburisation of coal at
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  8. In a Tandem type compound engine, the high pressure and low pressure cylinders
  9. In natural circulation type boiler,
  10. Carbonisation of coal is the process of
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  13. A device used to increase the temperature of saturated steam without raising its pressure, is called
  14. The function of a piston rod is
  15. The natural draught is produced by
  16. For a Parson's reaction turbine, if α₁ and α₂ are fixed blade angles at inlet…
  17. Sulphur content of fuels is very important to the plant operators because it
  18. While steam expands in turbines, theoretically the entropy
  19. Water boils when its vapour pressure
  20. The height of chimney in a power plant is governed by
  21. The biggest size of thermal power unit operating in India is
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  23. The efficiency of steam turbines may be improved by
  24. For the same length of stroke and speed of crankshaft, the piston speed for a double acting steam engine…
  25. A turbine is said to have an axial discharge when the steam leaves the blade tip at _________ to the…
  26. The ratio of the workdone on the blades to the energy supplied to the blades, is called
  27. The diameter of internal flue tubes of a Lancashire boiler is about _________ that of its shell.
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