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THE BOILERS AND PRESSURE VESSELS ORDINANCE, 2002 QUESTION #4077
Question 1
'Phosphate Treatment' in a boiler helps to:
  • Make the water blue
  • Keep scale-forming minerals in a soft, non-adherent 'sludge' form✔️
  • Increase the pressure
  • Clean the exterior
Correct Answer Explanation
The sludge is then removed via the blow-down.