Certified Pool Operator Practice Test

Disable ads (and more) with a membership for a one time $2.99 payment

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!

Practice this question and more.

If you measure the Total Available Chlorine as 1.6 and Free Available Chlorine as 1.5, what is the Combined Chlorine level?

0.1 ppm
0.2 ppm
0.5 ppm
0.6 ppm

The correct answer is: 0.1 ppm

When measuring chlorine levels in a pool or other water source, there are typically two types that are measured Total Available Chlorine (TAC) and Free Available Chlorine (FAC). TAC includes both the chlorine that is currently working to sanitize the water and the chlorine that has already finished sanitizing and is no longer active. FAC, on the other hand, only measures the chlorine that is currently active and working to sanitize the water. So in this scenario, where the TAC is 1.6 and the FAC is 1.5, it means that 1.5 parts per million (ppm) of the 1.6 ppm total chlorine is currently active and working. Therefore, the remaining 0.1 ppm is the Combined Chlorine level, which is the amount of chlorine that has already done its job and is no longer active. This is why the correct answer is A. The other options are incorrect because they either do not take into account the TAC and FAC levels or they do not reflect the remaining amount of Combined Chlorine.