Which of the following is a common procedure for boiler maintenance?

Regularly testing the pH levels of boiler water is crucial for effective boiler maintenance. Maintaining the correct pH levels ensures that the water treatment chemicals function properly and helps to prevent corrosion and scaling within the boiler system. If the pH is too low (acidic) or too high (alkaline), it can lead to significant issues, including damage to the boiler components and reduced efficiency. Therefore, this practice is essential for prolonging the life of the boiler and ensuring safe and efficient operation.

On the other hand, reducing the feedwater temperature is not a common procedure for maintenance; it could lead to thermal shock, which can damage equipment. Increasing pressure at all times is also not advisable, as it can lead to unsafe conditions and may exceed the design parameters of the system. Lastly, utilizing untreated water can introduce impurities that accelerate corrosion and scaling, leading to malfunctions and increased maintenance costs.