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What is one method used to remove dissolved gases from water in a boiler system?

  1. Boiling the water

  2. Filtration

  3. Deaeration

  4. Reverse osmosis

The correct answer is: Deaeration

Deaeration is the process specifically designed for removing dissolved gases, particularly oxygen and carbon dioxide, from water in a boiler system. This is crucial for preventing corrosion, which can cause significant damage to boiler components. In a boiler, dissolved gases can lead to issues such as pitting and related failures, hence their removal is essential for maintaining system integrity and efficiency. Deaeration typically involves heating the water and allowing it to come into contact with steam or a vacuum, which helps strip away these dissolved gases. This method ensures that the water used in the boiler is free from corrosive elements that could compromise the system over time. Other methods mentioned, such as boiling the water, filtration, or reverse osmosis, do not specifically target the removal of dissolved gases in the same way. While boiling might help release some gases, it is not a controlled process for gas removal in the context of boiler operations. Filtration is more suited for removing particulate matter from water rather than gases. Reverse osmosis is effective for purifying water but does not focus primarily on the elimination of dissolved gases like deaeration does.