Filtration and Circulation Systems Questions and Answers Flashcards
6 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 6 Filtration and Circulation Systems Questions and Answers flashcards as text
What is the standard turnover rate required for a public swimming pool?
Answer: 6 hours
Most health codes require a complete turnover of pool water every 6 hours for public swimming pools.
At what pressure differential should a sand filter be backwashed?
Answer: 8 to 10 psi above clean starting pressure
Sand filters should be backwashed when the pressure gauge reads 8 to 10 psi above the clean starting pressure.
What is the primary advantage of a DE filter over a sand filter?
Answer: Finer filtration capability down to 2 to 5 microns
DE filters can filter particles down to 2 to 5 microns compared to sand filters at 20 to 40 microns.
What is the purpose of a VGB Act compliant main drain cover?
Answer: To prevent suction entrapment injuries by meeting flow and size standards
The Virginia Graeme Baker Pool and Spa Safety Act requires anti-entrapment drain covers that prevent body, hair, limb, and evisceration entrapment.
What is the function of a flow meter in a pool circulation system?
Answer: To verify that the system achieves the required flow rate for proper turnover
Flow meters measure the actual water flow rate in GPM, allowing operators to verify the circulation system meets required turnover rates.
Why are pool return inlets positioned to create a circular flow pattern?
Answer: To eliminate dead spots and ensure uniform chemical distribution
Return inlets create circulation patterns that eliminate stagnant areas, ensuring chemicals are distributed evenly and all water passes through the filter system.