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THE BOILERS AND PRESSURE VESSELS ORDINANCE, 2002 QUESTION #4004
Question 1
When performing a Hydraulic Test, why is 'Air' removed from the boiler completely?
  • Air is too expensive
  • Compressed air stores massive energy and can cause an explosion if the boiler fails✔️
  • Air makes the water turn green
  • Air helps the boiler to float
Correct Answer Explanation
Water is incompressible; if the vessel ruptures during a hydrotest, there is no 'blast' like there would be with air/steam.