Practice Test GeeksExamen CPO de Operador de Piscinas Certificado Practice Test
← All CPO Flashcard Decks

Pool Calculations and Formulas Flashcards

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

Read the first 7 Pool Calculations and Formulas flashcards as text

  1. A rectangular pool is 75 feet long, 30 feet wide, and has an average depth of 6 feet. Using 7.5 gallons per cubic foot, what is the pool volume in gallons?

    Answer: 101,250 gallons

    Volume = length × width × average depth × 7.5 = 75 × 30 × 6 × 7.5 = 101,250 gallons.

  2. A circular pool has a radius of 15 feet and an average depth of 5 feet. Using π ≈ 3.14, what is the volume in gallons?

    Answer: 26,494 gallons

    Volume = π × r² × depth × 7.5 = 3.14 × 225 × 5 × 7.5 ≈ 26,494 gallons.

  3. A pool contains 120,000 gallons and state code requires the water to turn over every 6 hours. What minimum pump flow rate in GPM is required?

    Answer: 333 GPM

    Divide pool volume by turnover time in minutes: 120,000 ÷ (6 × 60) = 120,000 ÷ 360 = 333 GPM.

  4. Which constant is used when calculating the volume of an oval (elliptical) pool?

    Answer: 5.9

    Oval pool volume = length × width × average depth × 5.9, where 5.9 accounts for the elliptical shape (≈ π/4 × 7.5).

  5. A pool pump operates at 250 GPM. How many gallons does it circulate in 8 hours of continuous operation?

    Answer: 120,000 gallons

    250 GPM × 60 min/hr × 8 hr = 120,000 gallons circulated in 8 hours.

  6. A pool with an irregular shape has a measured surface area of 800 square feet and an average depth of 4 feet. What is the pool volume in gallons?

    Answer: 24,000 gallons

    Volume = surface area × average depth × 7.5 = 800 × 4 × 7.5 = 24,000 gallons.

  7. A small spa holds 600 gallons and local code requires it to turn over every 30 minutes. What minimum flow rate in GPM is required?

    Answer: 20 GPM

    GPM = pool volume ÷ turnover time in minutes = 600 ÷ 30 = 20 GPM.

How this page was made: written with AI tools and published by Nathan Beja, founder of Practice Test Geeks, who is responsible for its content. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy

Sources & references

Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy

  1. phta.org — Renewal, score validity, exam format, score release, eligibility · verified Oct 2026