Back to Questions
THE BOILERS AND PRESSURE VESSELS ORDINANCE, 2002 QUESTION #3987
Question 1
Before starting a 'Cold' boiler, why must it be heated slowly?
  • To save fuel
  • To prevent uneven thermal expansion and mechanical stress✔️
  • To keep the chimney cool
  • To prevent the water from turning into ice
Correct Answer Explanation
Rapid heating causes 'Thermal Shock' which can crack joints or the boiler shell.