CPO Filtration and Circulation Systems Questions and Answers 2

Question 1

What is the standard turnover rate required for a public swimming pool?

Accepted Answer

6 hours

Answer

Most health codes require a complete turnover of pool water every 6 hours for public swimming pools.

Question 2

At what pressure differential should a sand filter be backwashed?

Accepted Answer

8 to 10 psi above clean starting pressure

Answer

Sand filters should be backwashed when the pressure gauge reads 8 to 10 psi above the clean starting pressure.

Question 3

What is the primary advantage of a DE filter over a sand filter?

Accepted Answer

Finer filtration capability down to 2 to 5 microns

Answer

DE filters can filter particles down to 2 to 5 microns compared to sand filters at 20 to 40 microns.

Question 4

What is the purpose of a VGB Act compliant main drain cover?

Accepted Answer

To prevent suction entrapment injuries by meeting flow and size standards

Answer

The Virginia Graeme Baker Pool and Spa Safety Act requires anti-entrapment drain covers that prevent body, hair, limb, and evisceration entrapment.

Question 5

What is the function of a flow meter in a pool circulation system?

Accepted Answer

To verify that the system achieves the required flow rate for proper turnover

Answer

Flow meters measure the actual water flow rate in GPM, allowing operators to verify the circulation system meets required turnover rates.

CPO (Certified Pool Operator Exam) Practice Test