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. When a variable-speed pump (VSP) is programmed for low-speed operation at night, what is the primary benefit over a single-speed pump?

    Answer: Significantly reduced energy consumption while still maintaining circulation

    Variable-speed pumps can reduce speed and consume up to 90% less energy at low speeds because power consumption is proportional to the cube of the speed.

  2. A pool with a volume of 20,000 gallons uses a pump with a flow rate of 40 GPM. What is the turnover time?

    Answer: 8.3 hours

    Turnover time = pool volume ÷ flow rate = 20,000 ÷ 40 GPM = 500 minutes = approximately 8.3 hours.

  3. Black algae in a pool is particularly difficult to eradicate because:

    Answer: It forms a protective outer layer and roots into porous surfaces like plaster

    Black algae has a protective outer coating and roots deeply into porous surfaces, requiring aggressive brushing and high chlorine treatment to eliminate.

  4. What is the maximum recommended cyanuric acid (CYA) level for a residential outdoor pool to maintain chlorine effectiveness?

    Answer: 100 ppm

    The recommended maximum CYA for residential pools is 100 ppm, as higher levels significantly reduce chlorine's ability to kill pathogens (chlorine lock).

  5. A pool customer complains of green water despite adequate chlorine readings. After checking, the technician finds no algae. What is the most likely explanation?

    Answer: Dissolved metals (typically copper or iron) in the water

    Dissolved copper or iron in pool water can turn water green or brown, especially after shocking, even without algae present.

  6. When sizing a replacement pool pump, exceeding the original design flow rate can cause:

    Answer: Increased velocity through pipes that creates excessive head pressure and potential pipe damage

    Oversized pumps create excessive flow velocity, increasing head pressure beyond piping design limits and potentially causing noise, leaks, or pump cavitation.

  7. According to the VGB Pool and Spa Safety Act, what is required on all public pool suction outlet covers?

    Answer: An ASME/ANSI A112.19.8 certified drain cover rated for the pool's flow rate

    The VGB Act mandates that all public pool main drain covers meet ASME/ANSI A112.19.8 standards and be rated for the actual flow rate to prevent entrapment.