New York Low Pressure Boiler COF Practice 2025 - Free Practice Questions and Study Guide

The presence of rust or scale is a strong indicator of poor water quality in a boiler system. Rust can form when oxygen is present in the water, which leads to corrosion of metal components. Scale, on the other hand, is often a result of mineral deposits from hard water, which can accumulate on the heat exchange surfaces within the boiler. This buildup can impede heat transfer, leading to inefficiencies and potential overheating, ultimately risking the integrity of the boiler system. Monitoring for rust and scale is crucial because these factors not only indicate water quality issues but can also lead to operational problems if left unchecked.

While increased steam pressure, frequent boiler shutdowns, and a stable water level can be related to various aspects of boiler operation, they do not specifically point to issues regarding water quality in the same direct manner as rust or scale does. High steam pressure could be a result of many operational factors, while frequent shutdowns may arise from several system issues. A stable water level, on the other hand, typically suggests that the boiler is functioning properly in terms of water management but does not provide insight into the chemical composition or cleanliness of the water itself.