2nd Class Power Engineering (2B3) Practice Exam

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What is the significance of blowdown in a boiler?

To prevent the loss of steam

To increase efficiency of fuel usage

To control the concentration of contaminants in the boiler water

The significance of blowdown in a boiler is primarily to control the concentration of contaminants in the boiler water. Over time, dissolved solids and other impurities accumulate in the boiler water due to evaporation during steam generation. If these contaminants are allowed to build up, they can lead to issues such as scaling, corrosion, and reduced efficiency.

By performing a blowdown, a portion of the concentrated boiler water is intentionally released, allowing for the removal of impurities and the introduction of fresh water. This process helps to maintain water quality, ensuring that the boiler operates under safe and efficient conditions. Proper blowdown procedures are essential for the longevity and performance of the boiler system.

In summary, the correct answer emphasizes the role of blowdown in managing water quality and preventing problems associated with contaminant buildup, which is crucial for boiler operation and safety.

To maintain water levels in the steam drum