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Steel boilers are generally classified as which type?

  1. Water tube boilers

  2. Vapour tube boilers

  3. Square sectional boilers

  4. Oval Sectional boilers

The correct answer is: Water tube boilers

Steel boilers are generally classified as water tube boilers because they consist of a series of tubes that carry water and are surrounded by hot gases produced from combustion. This design allows for efficient heat transfer and steam generation. Water tube boilers are commonly used in various applications due to their ability to generate steam quickly and handle high pressure and temperature conditions effectively. The classification into water tube boilers reflects their construction and operational principles, as they enable better control over water quality and efficiency while also minimizing the risk of boiler explosions compared to other types.