CPO Pool Maintenance and Troubleshooting Questions and Answers 2

Question 1

What is the most likely cause of persistent green pool water despite maintaining adequate free chlorine levels?

Accepted Answer

Copper contamination from corroded heat exchangers or copper-based algaecides

Answer

High pH preventing chlorine effectiveness

Answer

Low calcium hardness

Answer

Excessive cyanuric acid

Question 2

A pool operator notices the filter pressure gauge has dropped 5 psi below normal. What is the most likely cause?

Accepted Answer

There is an obstruction in the suction line or the pump is losing prime

Answer

The filter needs backwashing

Answer

The water temperature is too high

Answer

Chemical levels are imbalanced

Question 3

What causes white flaky deposits (scale) to form on pool tile and equipment?

Accepted Answer

High calcium hardness combined with high pH and high total alkalinity

Answer

Low calcium hardness

Answer

Excessive chlorine levels

Answer

Low total dissolved solids

Question 4

Pool chlorine demand has suddenly increased dramatically. What should be investigated first?

Accepted Answer

Recent heavy rainfall, high bather loads, or a contamination event

Answer

The pump motor

Answer

The pool light fixtures

Answer

The automatic cover motor

Question 5

What is the correct procedure for a fecal incident involving formed stool in a public pool?

Accepted Answer

Close the pool, remove the material, raise free chlorine to 2 ppm for at least 25 minutes

Answer

Simply scoop it out and continue normal operation

Answer

Drain the entire pool immediately

Answer

Add algaecide and reopen after 1 hour

Question 6

What does a milky or cloudy appearance in pool water typically indicate?

Accepted Answer

Fine suspended particles from inadequate filtration or poor water chemistry

Answer

Proper chlorine levels

Answer

High bromine levels

Answer

Normal water conditions after refilling