Q. Which of the given boilers operate above critical pressure?

  • (A) natural circulation boilers
  • (B) forced circulation boilers
  • (C) once-through boilers
  • (D) water tube boilers
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✅ Correct Answer: (C) once-through boilers
Explanation: once-through boilers operate above critical pressure i.e., above 221.2bar. as the density of water and steam are same above the critical pressure there will be no recirculation. these types of boilers are also called as positive forced circulation boilers.

Published by Mr. Dubey ⭐ 104.85K Points at 23-Sep-2023 07:25 pm in Power Plant Engineering (PPE)

Explanation by: Mr. Dubey
once-through boilers operate above critical pressure i.e., above 221.2bar. as the density of water and steam are same above the critical pressure there will be no recirculation. these types of boilers are also called as positive forced circulation boilers.

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