Certified Pool Operator Practice Test

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Study for the Certified Pool Operator Test. Prepare with comprehensive flashcards and multiple-choice questions. Each question includes hints and detailed explanations. Get ready for your exam!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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A spa with a pH of 7.2, temperature of 103°F, calcium hardness of 600 ppm, total alkalinity of 120 ppm, and TDS of 1,500 will be:

acidic
neutral
scale forming
corrosive

The correct answer is: scale forming

This spa is considered to be "scale forming" because its calcium hardness and TDS levels are high, which can lead to the formation of scale on surfaces and equipment. Additionally, the pH and temperature levels are within a recommended range for scale formation. The other options are incorrect because a pH of 7.2 is slightly basic/alkaline, the temperature of 103°F is within the recommended range for a spa, and a total alkalinity of 120 ppm is also within a recommended range. Corrosiveness usually occurs at lower pH levels and high TDS levels can lead to an increase in overall water acidity. Therefore, the most likely result for this spa with these measurements would be the formation of scale.