Aquatic Facility Operator Final Exam
2025–2026, AFO Certification (Ontario) –
Complete Exam Q&A Review Material
Introduction:
This document provides a comprehensive set of exam-style
questions and correct answers covering the full scope of the
Aquatic Facility Operator (AFO) Final Exam for the 2025–2026
academic year. Topics include pool water chemistry, filtration
and circulation systems, safety and emergency procedures,
staffing policies, inspections, and Ontario Health and
municipal regulations. It is ideal as a complete study guide or
last-minute review for AFO certification preparation in
Ontario.
Exam Questions and Answers:
When do you backwash? ---Correct Answer---When the
pressure differential indicates it is needed
When do you body feeding (DE) ? ---Correct Answer---during
the filter cycle
,What is oxidation? ---Correct Answer---a chemical process that
destroys organic compounds in the pool water
What is disinfection? ---Correct Answer---the chemical process
that kills or deactivates pathogens
What does oxidation do? ---Correct Answer---destroys organics
What does sanitation do? ---Correct Answer---destroys
bacteria
What does poor oxidation result in? ---Correct Answer---
cloudy turbid water
What is the desirable chlorine compound? ---Correct Answer---
HOCl
Why is HOCl the desirable chlorine compound? ---Correct
Answer---because it oxidizes AND sanitizes
, When is HOCl produced? ---Correct Answer---Upon gas
chlorine, sodium hypochlorite (bleach) or calcium hypochlorite
being added to water
pH of soda ash ---Correct Answer---dissolved in water pH 13+
Safety considerations for chemical handling require what? ---
Correct Answer---eye wash station
When are chloramines formed? ---Correct Answer---under a
heavy organic load with low chlorine levels, often with limited
air movement
How do you get rid of chloramines? ---Correct Answer---you
super chlorinate
How do you obtain combined chlorine? ---Correct Answer---
(TC)-(FC) = combined chlorine
How do you calculate breakpoint calculation? ---Correct
Answer---multiply CC by 10
2025–2026, AFO Certification (Ontario) –
Complete Exam Q&A Review Material
Introduction:
This document provides a comprehensive set of exam-style
questions and correct answers covering the full scope of the
Aquatic Facility Operator (AFO) Final Exam for the 2025–2026
academic year. Topics include pool water chemistry, filtration
and circulation systems, safety and emergency procedures,
staffing policies, inspections, and Ontario Health and
municipal regulations. It is ideal as a complete study guide or
last-minute review for AFO certification preparation in
Ontario.
Exam Questions and Answers:
When do you backwash? ---Correct Answer---When the
pressure differential indicates it is needed
When do you body feeding (DE) ? ---Correct Answer---during
the filter cycle
,What is oxidation? ---Correct Answer---a chemical process that
destroys organic compounds in the pool water
What is disinfection? ---Correct Answer---the chemical process
that kills or deactivates pathogens
What does oxidation do? ---Correct Answer---destroys organics
What does sanitation do? ---Correct Answer---destroys
bacteria
What does poor oxidation result in? ---Correct Answer---
cloudy turbid water
What is the desirable chlorine compound? ---Correct Answer---
HOCl
Why is HOCl the desirable chlorine compound? ---Correct
Answer---because it oxidizes AND sanitizes
, When is HOCl produced? ---Correct Answer---Upon gas
chlorine, sodium hypochlorite (bleach) or calcium hypochlorite
being added to water
pH of soda ash ---Correct Answer---dissolved in water pH 13+
Safety considerations for chemical handling require what? ---
Correct Answer---eye wash station
When are chloramines formed? ---Correct Answer---under a
heavy organic load with low chlorine levels, often with limited
air movement
How do you get rid of chloramines? ---Correct Answer---you
super chlorinate
How do you obtain combined chlorine? ---Correct Answer---
(TC)-(FC) = combined chlorine
How do you calculate breakpoint calculation? ---Correct
Answer---multiply CC by 10
