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THE BOILERS AND PRESSURE VESSELS ORDINANCE, 2002 QUESTION #4073
Question 1
'Cold End Corrosion' in air preheaters is caused by:
  • Ice
  • Condensation of sulfuric acid from flue gases on cool surfaces✔️
  • Lack of fuel
  • Too much air
Correct Answer Explanation
Occurs if the exhaust temperature falls below the 'Acid Dew Point'.