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.

To be classified as a disinfectant, a compound must kill or inactivate 99.9% of contaminants and:

be odorless
leave a measurable residual in the water
have no effect on pH
be soluble in oil

The correct answer is: leave a measurable residual in the water

This statement indicates that in order for a compound to be classified as a disinfectant, not only does it need to kill or inactivate 99.9% of contaminants, but it must also leave a measurable residual in the water. This means that option A, C, and D are incorrect as they do not fulfill this secondary requirement. Option A suggests that the disinfectant must be odorless, which is not a necessary characteristic. Option C implies that the pH of the water must remain unchanged, but a disinfectant may alter the pH depending on its chemical composition. Option D mentions solubility in oil, which is irrelevant when considering the effectiveness of a disinfectant in water. Therefore, option B is the most accurate answer.