What tests are performed on boiler water to ensure proper treatment?

The correct response highlights the essential tests that are conducted on boiler water to maintain its quality and ensure efficient operation. Each parameter tested provides significant insights into the water chemistry that can affect boiler performance.

Performing pH tests helps in determining the acidity or alkalinity of the water, which is crucial because improper pH levels can lead to corrosion in the boiler system. Hardness tests measure the concentration of calcium and magnesium ions in the water, as higher levels can contribute to scale formation, reducing efficiency and potentially leading to failures.

Conductivity tests are critical for monitoring the concentration of dissolved ionic substances in the water, which can indicate contamination or concentration of impurities. Dissolved oxygen tests are conducted to measure the amount of oxygen in the water, as dissolved oxygen can also cause corrosion, particularly in the boiler's metal components.

In contrast, the other options listed do not cover the comprehensive approach needed to ensure proper boiler water treatment. Limiting the testing to only temperature and pressure does not provide insight into the water's chemistry. Relying solely on visual inspections and color tests does not provide the accurate measurement required to assess the different chemical properties of the boiler water. Lastly, while flow rate and efficiency tests are important for overall system performance, they do not specifically assess