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For combustion of a fuel, following is essential

A. Correct fuel air ratio

B. Proper ignition temperature

C. O₂ to support combustion

D. All the three above

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

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  1. The best suited coal for chain or travelling grate stoker boiler is
  2. In cross compounding, the cylinders are arranged
  3. Throttle governing of steam engines is a method of controlling the engine output by varying
  4. In order to compare the capacity of boilers, the feed water temperature and working pressure are taken…
  5. The high pressure boiler is one, which produces steam at a pressure more than
  6. Steam turbines may be classified according to
  7. De-Laval turbine is a
  8. The diameter of a cylindrical shell of a Scotch marine boiler varies from
  9. Adiabatic process is
  10. The equivalent evaporation is defined as
  11. The fire tubes in a Cochran boiler usually have _________ diameter.
  12. The actual power generated in the engine cylinder is called
  13. Natural water circulation, by convection in water tube boilers, with increase in pressure of boiler
  14. In order to reduce the rotor speed of an impulse turbine, the method employed is
  15. The average value of diagram factor lies between
  16. Cut-off ratio is the ratio of
  17. O₂ content in atmospheric air on volume basis is
  18. A compound steam engine in which the high pressure and low pressure cylinders have common piston rod,…
  19. The expansion of steam, as it flows over the blades in reaction turbine, represents
  20. The average operating pressure of Benson boiler is
  21. The mechanical draught _________ with the amount of smoke.
  22. In water tube boilers
  23. In fire tube boilers
  24. The draught (in mm of water), for maximum discharge of flue gases through the chimney, is given by (where…
  25. The chimney draught varies with
  26. Efficiency of Rankine cycle can be increased by
  27. The effect of bleeding is that
  28. The evaporation of 15.653 kg of water per hour from and at 100°C is called
  29. The high steam and low water safety valve is used to blow off steam when the
  30. The diameter of fire tubes in Cochran boiler is of the order of