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THE BOILERS AND PRESSURE VESSELS ORDINANCE, 2002 QUESTION #3981
Question 1
The 'Economizer' in a boiler system is used to heat:
  • The fuel before combustion
  • Feed water using flue gases✔️
  • The steam to make it superheated
  • The air entering the furnace
Correct Answer Explanation
Economizers improve efficiency by recovering waste heat from exhaust gases to pre-heat feed water.