CPO Water Testing and Analysis 2

Question 1

What is the recommended pH range for public swimming pool water according to standard CPO guidelines?

Accepted Answer

7.2–7.8

Answer

6.5–7.2

Answer

7.8–8.2

Answer

6.8–7.0

Question 2

What is the standard target range for total alkalinity in a public swimming pool?

Accepted Answer

80–120 ppm

Answer

40–60 ppm

Answer

60–80 ppm

Answer

150–200 ppm

Question 3

Which of the following does a DPD (N,N-diethyl-p-phenylenediamine) test kit measure?

Accepted Answer

Both free chlorine and total chlorine

Answer

Combined chlorine only

Answer

Total chlorine only

Answer

Cyanuric acid levels only

Question 4

What is the recommended calcium hardness range for swimming pools to prevent corrosion and scale formation?

Accepted Answer

200–400 ppm

Answer

100–150 ppm

Answer

150–200 ppm

Answer

400–600 ppm

Question 5

When using a DPD test kit, the presence of free chlorine causes the water sample to turn which color?

Accepted Answer

Pink or red

Answer

Yellow

Answer

Blue

Answer

Colorless

Question 6

The OTO (orthotolidine) reagent tests for which water parameter?

Accepted Answer

Total chlorine

Answer

Free chlorine only

Answer

pH level

Answer

Combined chlorine only

Question 7

When collecting a pool water sample for chemical testing, where should the sample be taken?

Accepted Answer

At elbow depth (about 18 inches) away from return inlets and skimmers

Answer

From the surface near the main skimmer

Answer

From the deep end near the pool floor

Answer

Directly from an active return jet