Why is it necessary to blow down the water column of a boiler daily?

• A. To maintain water level
• B. To keep passages above and below the glass clean
• C. To remove excess pressure
• D. To add chemical treatments

Answer: (B)

Blowing down the water column of a boiler daily is crucial for keeping the gauge glass and the passages above and below it clean. This process helps to eliminate sludge, sediment, or other impurities that might accumulate over time, which could obstruct the accurate reading of the water level in the boiler. A clear gauge glass is vital for safe operation, as it allows operators to monitor the water level and prevent situations that could lead to overheating or even a boiler explosion due to low water conditions. Maintaining cleanliness in these areas ensures the reliability and safety of boiler operations.

While other options touch on important aspects of boiler management, such as maintaining water level or pressure, they do not specifically address the need to keep the water column clear for accurate readings.