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THE BOILERS AND PRESSURE VESSELS ORDINANCE, 2002 QUESTION #4069
Question 1
'Hard Water' in a boiler causes 'Scale', while 'Pure Water' (very low $pH$) causes:
  • Efficiency to increase
  • Corrosion and 'Acid Attack' on the metal✔️
  • Ice to form
  • The boiler to turn blue
Correct Answer Explanation
Water that is too pure can be 'hungry' and dissolve the metal.