Home

Which is not the correct statement about moisture in coal?

A. Inherent moisture and surface moisture are different things

B. In some coals moisture may be present up to 40%

C. Some moisture in coal helps in better burning which is not possible with completely dry coal

D. It increases thermal efficiency

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

You can do it
  1. Water tube boilers are those in which
  2. A double acting steam engine with a cylinder diameter of 190 mm and a stroke of 300 mm has a cut-off…
  3. The diameter of internal flue tubes in a Lancashire boiler compared to its shell is
  4. An ideal regenerative cycle is
  5. The saturation temperature of steam with increase in pressure increases
  6. The function of a crosshead is to guide motion of the _________ and to prevent it from bending.
  7. The chimney draught varies with
  8. In order to reduce the rotor speed of an impulse turbine, the method employed is
  9. Which of the following statement is wrong?
  10. A regenerative steam cycle renders
  11. The three Ts for good combustion are
  12. The critical pressure at which latent heat of vaporisation is zero is
  13. In a reaction turbine, when steam flows through the fixed blades,
  14. Which of the following statement is correct for steam turbines as compared to reciprocating steam engines?
  15. The mechanical draught _________ with the amount of smoke.
  16. For the same diameter and thickness of tube, a water tube boiler has ________ heating surface as compared…
  17. In a velocity compounded impulse turbine, when steam flows through the second row of moving blades,
  18. The high steam and low water safety valve is used to blow off steam when the
  19. The efficiency of the plant __________ with the mechanical draught.
  20. The relative efficiency is defined as the
  21. On Mollier chart, free expansion, or throttling process from high pressure to atmosphere is represented…
  22. The stage efficiency (ηS) is given by (where ηB = Blading efficiency, and ηN = Nozzle…
  23. Heating wet steam at constant temperature is heating it at constant
  24. The heat balance sheet for the boiler shows the
  25. With increase in load, radiant superheater has
  26. By compounding the expansion of steam in two or more cylinders, the length of stroke
  27. Throttle governing of steam engines is a method of controlling the engine output by varying
  28. A compound steam engine in which the high pressure and low pressure cylinders have common piston rod,…
  29. The critical pressure ratio is given by (where p₁ = Initial pressure of steam, and p₂…
  30. The factor of evaporation for all boilers is always