CPO Water Testing and Analysis Questions and Answers 2

Question 1

What is the correct procedure for collecting a pool water sample for testing?

Accepted Answer

Collect from 12 to 18 inches below the surface, away from return inlets

Answer

Scoop water from the pool surface

Answer

Collect directly in front of a return inlet

Answer

Any location and method will give accurate results

Question 2

What causes a DPD free chlorine test to show a clear result when chlorine has been added?

Accepted Answer

Chlorine bleaching from extremely high chlorine levels bleaches the DPD reagent

Answer

The reagent is expired

Answer

The chlorine has fully dissipated

Answer

The test kit is faulty

Question 3

What is the phenol red indicator used to measure in pool water testing?

Accepted Answer

pH level

Answer

Free chlorine

Answer

Total alkalinity

Answer

Cyanuric acid

Question 4

How should a pool operator verify the accuracy of their test kit?

Accepted Answer

Use a standard reference solution of known concentration

Answer

Compare with another operator's reading

Answer

Test kits never need verification

Answer

Send a sample to a laboratory monthly

Question 5

What does a cyanuric acid test measure and what method is commonly used?

Accepted Answer

Stabilizer concentration using a turbidity method with melamine reagent

Answer

Chlorine stability using a color comparator

Answer

pH using litmus paper

Answer

CYA cannot be tested on-site

Question 6

What is the purpose of a total alkalinity titration test?

Accepted Answer

It measures the water's buffering capacity by counting acid drops until a color change occurs

Answer

It measures chlorine levels using DPD

Answer

It measures calcium hardness using EDTA

Answer

It tests for metals using a colorimeter