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THE BOILERS AND PRESSURE VESSELS ORDINANCE, 2002 QUESTION #3985
Question 1
'Blow-down' operation is performed in a boiler primarily to:
  • Increase steam pressure
  • Remove accumulated sludge and dissolved solids from the bottom✔️
  • Clean the chimney
  • Cool down the furnace quickly
Correct Answer Explanation
Continuous or intermittent blow-down prevents scale formation by reducing the concentration of impurities.