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A _________ in a boiler is used to put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit.

A. Blow off cock

B. Fusible plug

C. Stop valve

D. Safety valve

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  1. The function of injector used in small steam plants is to
  2. In order to reduce the rotor speed of an impulse turbine, the method employed is
  3. The draught may be produced by a
  4. A compound steam engine in which the high pressure and low pressure cylinders have common piston rod,…
  5. An economiser in a boiler
  6. For water, at pressures below atmospheric;
  7. The diameter of internal flue tubes in a Lancashire boiler compared to its shell is
  8. A device used to heat feed water by utilising the heat in me exhaust flue gases before leaving through…
  9. Thermal efficiency of well maintained boiler will be of the order
  10. In an impulse reaction turbine, the pressure drops gradually and continuously over
  11. For a Parson's reaction turbine, if α₁ and α₂ are fixed blade angles at inlet…
  12. O₂ content in atmospheric air on weight basis is
  13. Thermal efficiency of a thermal power plant is of the order of
  14. A device in which some portion of waste heat of flue gases is recovered to heat the air before it passes…
  15. The ratio of heat utilised to produce steam and the heat liberated in furnace is known as
  16. The reheat factor depends upon
  17. The critical pressure ratio for initially superheated steam is __________ as compared to initially dry…
  18. Size of boiler tubes is specified by
  19. Hard coke is produced by carburisation of coal at
  20. De-Laval turbine is a
  21. Superheating of steam is done at
  22. The diameter of tubes for natural circulation boiler as compared to controlled circulation boilers is
  23. The capacity of induced draft fan compared to forced draft fan in a boiler is
  24. The impulse reaction turbine has its driving force
  25. The critical pressure gives the velocity of steam at the throat
  26. The behaviour of coal in a furnace is determined by
  27. In forced recirculation type boiler,
  28. For burning 1 kg of carbon to CO as per chemically correct combustion, amount of air required is
  29. Which of the following statement is correct?
  30. The coal requirement per kW hour generation in the thermal power plant is of the order of