Induced draft fans provided in large thermal power plant boilers have __________ blades.

A. Forward curved

B. Backward curved

C. Double curved

D. Radial or straight

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  1. Eutectoid composition of carbon steel at room temperature is
  2. Aluminium is extracted from
  3. Hardening of steel is not possible, unless it is heated __________ critical point.
  4. All of the following alloying elements of steel increases hardness but sacrifice ductility, except
  5. Work done by a/an __________ process is determined by ∫p. dv
  6. In troposphere (the weather domain), the temperature 't' at height 'h' above the sea level in metres…
  7. A material is capable of resisting softening at high temperature, because of its property termed as
  8. Metal cutting by oxy-acetylene flame is accomplished by the __________ of the metal.
  9. Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by
  10. Fine grained steels have
  11. __________ is the process of coating the surface of steel with aluminium oxide, thereby imparting it…
  12. Spherical shape of mercury droplets is due to its
  13. Stainless steel is welded with difficulty because of
  14. The most important consideration in value engineering is the
  15. In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb…
  16. The lightest non-inflammable gas is
  17. Referring to the periodic table of elements, it is found that with increasing atomic number. The atomic…
  18. The dimensional formula of bulk modulus of elasticity is same as that of the
  19. The cathode in an electrochemical cell always carries
  20. The noble metals
  21. Percentage of differential pressure lost in a Venturimeter with a tapering of 15° may be about
  22. Transformation range for ferrous material is the temperature interval during which __________ is formed…
  23. Alloying elements present in Haynes stellite, which has superior performance than high speed steel,…
  24. While the oxy-acetylene flame produces a temperature of 3200°C, the temperature produced by oxy-hydrogen…
  25. Surface tension of a liquid
  26. Which of the following mainly decides the current to be employed is arc welding?
  27. Consumable electrodes are used in the __________ welding.
  28. Oxyacetylene reducing flame is used while carrying out welding on
  29. Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare…
  30. Out of the following, the best material capable of withstanding shock & vibration without the danger…