What is a significant danger when adding water to a low-pressure boiler?

The significant danger when adding water to a low-pressure boiler is primarily associated with the visibility of water levels. When water is added to the boiler, the operator may not have a clear view of the water levels due to various factors, including steam production and boiler design. This lack of visibility can lead to the potential for overfilling, which may cause water carryover into steam lines. Water carryover can damage equipment, affect the quality of steam being produced, and lead to unsafe operating conditions.

While various issues can arise when adding water to a low-pressure boiler, such as temperature differentials leading to thermal stress or potential capacity concerns, the visibility of water levels stands out as a critical factor in ensuring safe boiler operation. Addressing the visibility of water levels is crucial to prevent mishaps that could contribute to unsafe situations in boiler operations.