Certified Pool Operator Practice Test

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When determining the degree of saturation and pool water, what constant value should be used when the TDS is found to be higher (1,000-2,000 ppm)?

11.5
12.0
12.1
12.2

The correct answer is: 11.5

The constant value of 11.5 should be used when determining the degree of saturation in pool water with high TDS levels (1,000-2,000 ppm). This is because the higher levels of TDS in the pool water can affect the solubility of calcium carbonate, resulting in a decreased saturation index. Using a higher constant value, such as 12.0, would result in an inaccurate calculation of the degree of saturation, and could potentially lead to issues with scaling and corrosion. The other options (B, C, D) are all higher than 11.5, and therefore would not be suitable for use in this situation.