CPO Pool Calculations and Formulas 2

Question 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?

Accepted Answer

101,250 gallons

Answer

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

Question 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?

Accepted Answer

26,494 gallons

Answer

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

Question 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?

Accepted Answer

333 GPM

Answer

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

Question 4

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

Accepted Answer

5.9

Answer

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

Question 5

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

Accepted Answer

120,000 gallons

Answer

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

CPO (Certified Pool Operator Exam) Practice Test

CPO (Certified Pool Operator Exam) Practice Test

CPO Pool Calculations and Formulas 2