Which of the following statement is wrong?

A. The factor of evaporation for all boilers is always greater than unity.

B. The amount of water evaporated in kg per kg of fuel burnt is called equivalent evaporation from and at 100° C.

C. The ratio of heat actually used in producing the steam to the heat liberated in the furnace is called boiler efficiency.

D. None of the above

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

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  1. The function of a safety valve is
  2. When the cross-section of a nozzle __________ continuously from entrance to exit, it is called a convergent…
  3. In forced circulation type boiler
  4. The numbers of fire tubes in a Cochran boiler are
  5. The velocity of flue gases (V) through the chimney under a static draught of (H') metres is given by
  6. Which of the following statement is correct?
  7. Throttle governing of steam engines is a method of controlling the engine output by varying
  8. The crown of the fire box is made hemispherical in order to
  9. A single stage impulse turbine with a diameter of 1.2 m runs at 3000 r.p.m. If the blade speed ratio…
  10. Boiler stays are used to
  11. A throttle governed steam engine develops 15 kW with 280 kg per hour of steam and 35 kW with 520 kg…
  12. Clearance ratio is the ratio of
  13. The function of an eccentric rod is
  14. The amount of water evaporated from feed water at _________ into dry and saturated steam at 100°…
  15. The draught (in mm of water), for maximum discharge of flue gases through the chimney, is given by (where…
  16. The maximum discharge of steam through a convergent-divergent nozzle depends upon
  17. Evaporative capacity of boiler is expressed as
  18. In a Tandem type compound engine, the high pressure and low pressure cylinders
  19. Relative percentage of heat absorbed through the heat transfer of (i) Furnace water wall (ii) Boiler…
  20. In water tube boilers
  21. Fire tube boilers are
  22. If the critical pressure ratio for steam is 0.546, then the steam is initially
  23. The pressure at which latent heat of vaporisation of water is zero, is
  24. An economiser _________ the steam raising capacity of a boiler.
  25. Which of the following statement is wrong?
  26. The ratio of the isentropic heat drop to the heat supplied, is called
  27. The critical pressure at which latent heat of vaporisation is zero is
  28. When the back pressure of a nozzle is below the designed value of pressure at exit of nozzle, the nozzle…
  29. The clearance in the engine cylinder
  30. The pressure velocity compounded impulse turbine allows a bigger pressure drop and hence __________…