Practice Test Geeks(CAT) Certified Aquatic Technicians Practice Test
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Aquatic Technicians Skills and Knowledge Areas Flashcards

7 cards from real CAT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Aquatic Technicians Skills and Knowledge Areas flashcards as text

  1. Which method is used to eliminate chloramines from a pool by adding enough chlorine to reach a specific oxidation threshold?

    Answer: Breakpoint chlorination (typically 10x the combined chlorine level)

    Breakpoint chlorination requires adding chlorine to approximately 10 times the combined chlorine reading to fully oxidize chloramines.

  2. A pool heater fails to ignite. After confirming gas supply is adequate, what should the technician check next?

    Answer: Flow switch or pressure switch to ensure adequate water flow

    Pool heaters have a flow switch or pressure switch that prevents ignition if water flow is insufficient, protecting the heat exchanger.

  3. When reading a multiport valve position, 'RECIRCULATE' bypasses which component?

    Answer: The filter

    The RECIRCULATE position sends water from the pump back to the pool without passing through the filter media.

  4. What does a saturation index (Langelier Saturation Index) value of +0.5 indicate about pool water?

    Answer: The water is slightly scale-forming

    An LSI above 0 indicates scale-forming (calcium deposits) tendency; +0.5 is mildly scale-forming but outside the ideal -0.3 to +0.3 range.

  5. A salt chlorine generator (SWG) is producing low chlorine output even though salt levels are correct. What is the most common cause?

    Answer: Calcium buildup on the electrolytic cell plates

    Calcium scale deposits on the electrolytic cell reduce its ability to generate chlorine and must be cleaned with an acid wash.

  6. Under OSHA guidelines, when handling concentrated muriatic acid for pool pH adjustment, a technician must wear:

    Answer: Chemical splash goggles, acid-resistant gloves, and a face shield

    Muriatic acid (hydrochloric acid) is highly corrosive and requires full PPE including chemical splash goggles, acid-resistant gloves, and a face shield.

  7. What is the primary purpose of a pool skimmer weir door?

    Answer: To regulate the flow of water into the skimmer and maintain a consistent surface skimming action

    The weir door floats to create a surface-skimming action, pulling the top layer of water (where oils and debris accumulate) into the skimmer.