Technician Licensing Exam Practice

Swimming Pool Maintenance Technician Licensing Exam Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• What is the ideal pH range for a residential swimming pool?

A. 6.5 – 7.0

B. 7.0 – 7.2

C. 7.2 – 7.8

D. 8.0 – 8.5

C. 7.2 – 7.8

Maintaining pH in this range ensures water comfort, sanitizer effectiveness, and prevents corrosion or scaling.

• Which chemical is commonly used as a sanitizer in pools?
• Sodium bicarbonate 1 / 4

• Chlorine
• Sodium hydroxide
• Calcium carbonate
• Chlorine

Chlorine is widely used for killing bacteria and controlling algae in swimming pools.

3. Total alkalinity in pool water primarily helps to:

• Control water temperature
• Stabilize pH
• Increase chlorine efficiency
• Reduce water hardness
• Stabilize pH

Alkalinity acts as a buffer to prevent rapid pH changes in pool water.

• Which test measures the combined concentration of free chlorine and

chloramines in pool water?

• pH test
• Total alkalinity
• Total chlorine test
• Cyanuric acid test
• Total chlorine test

Total chlorine includes both free chlorine (active sanitizer) and chloramines (combined chlorine). 2 / 4

• What is the primary function of a pool skimmer?
• Heat the water
• Remove floating debris
• Increase water flow
• Balance pH
• Remove floating debris

Skimmers collect leaves, insects, and other surface debris before it sinks to the pool bottom.

• Which pump component is responsible for moving water through the

filtration system?

• Impeller
• Strainer basket
• Chlorinator
• Heater
• Impeller

The impeller creates water flow by spinning and generating suction in the pump system.

• What is the recommended chlorine level in a residential pool?
• 0.5–1.0 ppm
• 1–3 ppm
• 3–5 ppm
• 5–7 ppm 3 / 4

• 1–3 ppm

This range is effective for sanitation while being safe for swimmers.

• Which chemical is used to raise the pH of pool water?
• Muriatic acid
• Sodium carbonate (soda ash)
• Chlorine
• Sodium bisulfate
• Sodium carbonate (soda ash)

Soda ash increases pH without significantly affecting alkalinity.

9. A cloudy pool is most often caused by:

• Low chlorine
• High pH
• Poor filtration
• All of the above
• All of the above

Cloudiness can result from chemical imbalance, insufficient sanitizer, or inadequate filtration.

10. Cyanuric acid in a pool primarily serves to:

• Increase pH
• Stabilize chlorine
• Remove algae
• Soften water
• / 4