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Maximum energy loss in a boiler occurs due to

A. Unburnt carbon in ash

B. Incomplete combustion

C. Ash content

D. Flue gases

Correct Answer : D.


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  1. The diameter of Cornish boiler is of the order of
  2. The draught produced by a steam jet issuing from a nozzle placed in the ash-pit under the fire grate…
  3. The efficiency of a boiler is defined as
  4. The main object of a boiler trial is
  5. Which of the following statement is wrong?
  6. Throttle governing of steam engines is a method of controlling the engine output by varying
  7. Thermal efficiency of a thermal power plant is of the order of
  8. Which of the following is not a boiler mounting?
  9. Pulverised fuel is used for
  10. The friction present between the steam and the nozzle surfaces reduces the heat drop by
  11. Calorific value of coal is of the order of
  12. In a Woolf type compound engine, the high pressure and low pressure cylinders
  13. The pressure compounded impulse turbine as compared to velocity compounded turbine require __________…
  14. Which of the following statement is wrong?
  15. The major axis of elliptical manholes on the shell should be provided
  16. The action of steam in a steam turbine is
  17. Expansion ratio is the ratio of
  18. The ratio of heat equivalent to brake power to the energy supplied in steam is known as
  19. The diameter of Cornish boiler varies from
  20. A device used to increase the temperature of saturated steam without raising its pressure, is called
  21. The function of a valve rod is
  22. In reaction turbines, the axial thrust is due to
  23. When the nozzle operates with the maximum mass flow, the nozzle is said to be
  24. The rate of discharge through the nozzle __________ when the exit pressure is gradually reduced.
  25. Adiabatic process is
  26. Which of the following is a fire tube boiler?
  27. Rateau turbine is
  28. The steam temperature with increase in load in case of a boiler fitted with radiation superheater
  29. Blading efficiency is also known as
  30. Stoichiometric quantity of air is the