CT Swimming Pool Contractor Exam
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A| Instant Download Pdf
1. What is the minimum required barrier height for a residential
swimming pool in Connecticut?
A. 42 inches
B. 46 inches
C. 48 inches
D. 52 inches
Rationale: Connecticut adopts the IRC/ISPSC standard requiring at least a
48-inch pool barrier height.
2. What is the typical maximum gap allowed at the bottom of a pool
barrier?
A. 1 inch
B. 2 inches
C. 4 inches
D. 6 inches
Rationale: Barriers may have no more than a 4-inch opening from the
ground to prevent child access.
3. What is the main purpose of a pool bonding system?
A. Strengthen concrete
B. Equalize electrical potential
,C. Filter water
D. Reduce pump noise
Rationale: Bonding keeps all metal components at the same electrical
potential to prevent shock hazards.
4. Which pipe material is most commonly used for in-ground pool
plumbing?
A. Copper
B. Schedule 40 PVC
C. PEX
D. Galvanized steel
Rationale: Schedule 40 PVC is industry standard for durability and
chemical resistance.
5. What is the recommended turnover rate for residential swimming
pools?
A. 1 hour
B. 4 hours
C. 6–8 hours
D. 12 hours
Rationale: Most codes and manufacturers recommend a 6–8 hour turnover
for proper circulation.
6. Which valve is used to control water flow from multiple suction lines?
A. Gate valve
B. Diverter valve
C. Ball valve
D. Float valve
Rationale: Diverter valves allow directional control among several lines.
7. What is the normal operating pressure range for a sand filter?
A. 0–5 psi
B. 5–10 psi
C. 10–20 psi
, D. 20–30 psi
Rationale: Most sand filters run in the 10–20 psi range when clean.
8. When should a sand filter be backwashed?
A. Weekly
B. When pressure increases 8–10 psi over clean pressure
C. Daily
D. Monthly
Rationale: Pressure increase indicates clogging and reduces filtration
efficiency.
9. The purpose of a check valve in a pool system is to:
A. Increase flow
B. Reduce noise
C. Mix chemicals
D. Prevent reverse flow
Rationale: Check valves prevent backflow that can damage equipment or
drain water.
10. What is the ideal pH range for swimming pools?
A. 6.2–6.8
B. 6.8–7.0
C. 7.2–7.8
D. 8.0–8.4
Rationale: This range balances comfort, sanitizer effectiveness, and
equipment protection.
11. Which disinfectant is most commonly used in swimming pools?
A. Bromide
B. Ozone
C. Chlorine
D. UV
Rationale: Chlorine is the primary sanitizer used in most residential pools.
12. What is free chlorine?
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A| Instant Download Pdf
1. What is the minimum required barrier height for a residential
swimming pool in Connecticut?
A. 42 inches
B. 46 inches
C. 48 inches
D. 52 inches
Rationale: Connecticut adopts the IRC/ISPSC standard requiring at least a
48-inch pool barrier height.
2. What is the typical maximum gap allowed at the bottom of a pool
barrier?
A. 1 inch
B. 2 inches
C. 4 inches
D. 6 inches
Rationale: Barriers may have no more than a 4-inch opening from the
ground to prevent child access.
3. What is the main purpose of a pool bonding system?
A. Strengthen concrete
B. Equalize electrical potential
,C. Filter water
D. Reduce pump noise
Rationale: Bonding keeps all metal components at the same electrical
potential to prevent shock hazards.
4. Which pipe material is most commonly used for in-ground pool
plumbing?
A. Copper
B. Schedule 40 PVC
C. PEX
D. Galvanized steel
Rationale: Schedule 40 PVC is industry standard for durability and
chemical resistance.
5. What is the recommended turnover rate for residential swimming
pools?
A. 1 hour
B. 4 hours
C. 6–8 hours
D. 12 hours
Rationale: Most codes and manufacturers recommend a 6–8 hour turnover
for proper circulation.
6. Which valve is used to control water flow from multiple suction lines?
A. Gate valve
B. Diverter valve
C. Ball valve
D. Float valve
Rationale: Diverter valves allow directional control among several lines.
7. What is the normal operating pressure range for a sand filter?
A. 0–5 psi
B. 5–10 psi
C. 10–20 psi
, D. 20–30 psi
Rationale: Most sand filters run in the 10–20 psi range when clean.
8. When should a sand filter be backwashed?
A. Weekly
B. When pressure increases 8–10 psi over clean pressure
C. Daily
D. Monthly
Rationale: Pressure increase indicates clogging and reduces filtration
efficiency.
9. The purpose of a check valve in a pool system is to:
A. Increase flow
B. Reduce noise
C. Mix chemicals
D. Prevent reverse flow
Rationale: Check valves prevent backflow that can damage equipment or
drain water.
10. What is the ideal pH range for swimming pools?
A. 6.2–6.8
B. 6.8–7.0
C. 7.2–7.8
D. 8.0–8.4
Rationale: This range balances comfort, sanitizer effectiveness, and
equipment protection.
11. Which disinfectant is most commonly used in swimming pools?
A. Bromide
B. Ozone
C. Chlorine
D. UV
Rationale: Chlorine is the primary sanitizer used in most residential pools.
12. What is free chlorine?
