Pool Operator Exam With Correct Detailed
Answers 2025.
whole range chlorine in a pool: ____ to _____ - ANSWER- 1, 5
ideal range chlorine in a pool: ____ to _____ - ANSWER- 2, 4
whole range chlorine in a spa: ____ to _____ - ANSWER- 2, 10
ideal range chlorine in a spa: ____ to _____ - ANSWER- 3, 5
4 types of solid chlorine - ANSWER- calcium hypochlorite, lithium hypochlorite, trichlor,
dichlor
liquid chlorine - ANSWER- sodium hypochlorite (NaOCl)
how active is gas chlorine - ANSWER- 100%
the active killing form of chlorine in water - ANSWER- hypochlorous acid (HOCl)
HOCl = ______ - ANSWER- H+ (hydrogen ion) + OCl- (hypochlorite ion)
most common granular chlorine (pH range) - ANSWER- calcium hypochlorite (8.5 - 11,
used to super chlorinate water)
not common form of chlorine due to low active strength (pH) - ANSWER- lithium
hypochlorite (10.8)
tablet/stick chlorine usually used in erosion feeder (pH - what will it do?) - ANSWER-
trichlor (2.8 - 3.5, lower alkalinity and pH over time)
salt used as a disinfectant (pH) - ANSWER- dichlor (6.7 - common in vinyl lined pools)
most common type of chlorine used (pH) - ANSWER- sodium hypochlorite (NaOCl - 13)
______ needs special training to use and has a pH of ____ and will _____ when added
to water - ANSWER- gas chlorine, 0, lower pH
chlorine is most effective as a pH of _____ - ANSWER- 7.5
active disinfectant in the water - ANSWER- free chlorine (FC)
, FC is determined by the ______ test and is maintained between ____ and ____ ppm -
ANSWER- DPD, 2, 4
equal to the amount of hypochlorous acid (HOCl) and the amt of hypochlorite ions
(OCl-) - ANSWER- free chlorine (fc)
the result of free chlorine reacting with organic compounds - ANSWER- combine
chlorine (CC)
common name and max for pools and spas for combine chlorine - ANSWER-
chloramines, 0.2, 0.5
CC = - ANSWER- TC - FC
what will a DPD measure - ANSWER- TC, FC
how much CC should a pool have ideally - ANSWER- zero
shocking the pool is also called - ANSWER- breakpoint chlorination
breakpoint chlorination is the conversion of ________ into ______ - ANSWER- combine
chlorine, nitrogen gas
breakpoint chlorination equation - ANSWER- BPC = 10 x CC [BPC = 10 x (TC - FC)]
whole cyanuric acid range: _____ to ______ppm - ANSWER- 0, 100
ideal cyanuric acid range: _____ to ______ ppm - ANSWER- 30, 50
acts as a protection for chlorine compounds from UV light - ANSWER- cyanuric acid
CyA will act as a stabilizer for _______ but does not
stabilize ________ - ANSWER- free chlorine, bromine
The only way to reduce CyA concentration is to _______ - ANSWER- dilute the water
and replace it
whole range of bromine: ____ to _____ - ANSWER- 2, 10
ideal range of bromine: _____ to ______ - ANSWER- 4, 6
second most common disinfectant in the pool - ANSWER- bromine
two types of bromine used - ANSWER- sodium bromide, solid bromide
Bromine in natural form is a ______ but is in _____ form when
Answers 2025.
whole range chlorine in a pool: ____ to _____ - ANSWER- 1, 5
ideal range chlorine in a pool: ____ to _____ - ANSWER- 2, 4
whole range chlorine in a spa: ____ to _____ - ANSWER- 2, 10
ideal range chlorine in a spa: ____ to _____ - ANSWER- 3, 5
4 types of solid chlorine - ANSWER- calcium hypochlorite, lithium hypochlorite, trichlor,
dichlor
liquid chlorine - ANSWER- sodium hypochlorite (NaOCl)
how active is gas chlorine - ANSWER- 100%
the active killing form of chlorine in water - ANSWER- hypochlorous acid (HOCl)
HOCl = ______ - ANSWER- H+ (hydrogen ion) + OCl- (hypochlorite ion)
most common granular chlorine (pH range) - ANSWER- calcium hypochlorite (8.5 - 11,
used to super chlorinate water)
not common form of chlorine due to low active strength (pH) - ANSWER- lithium
hypochlorite (10.8)
tablet/stick chlorine usually used in erosion feeder (pH - what will it do?) - ANSWER-
trichlor (2.8 - 3.5, lower alkalinity and pH over time)
salt used as a disinfectant (pH) - ANSWER- dichlor (6.7 - common in vinyl lined pools)
most common type of chlorine used (pH) - ANSWER- sodium hypochlorite (NaOCl - 13)
______ needs special training to use and has a pH of ____ and will _____ when added
to water - ANSWER- gas chlorine, 0, lower pH
chlorine is most effective as a pH of _____ - ANSWER- 7.5
active disinfectant in the water - ANSWER- free chlorine (FC)
, FC is determined by the ______ test and is maintained between ____ and ____ ppm -
ANSWER- DPD, 2, 4
equal to the amount of hypochlorous acid (HOCl) and the amt of hypochlorite ions
(OCl-) - ANSWER- free chlorine (fc)
the result of free chlorine reacting with organic compounds - ANSWER- combine
chlorine (CC)
common name and max for pools and spas for combine chlorine - ANSWER-
chloramines, 0.2, 0.5
CC = - ANSWER- TC - FC
what will a DPD measure - ANSWER- TC, FC
how much CC should a pool have ideally - ANSWER- zero
shocking the pool is also called - ANSWER- breakpoint chlorination
breakpoint chlorination is the conversion of ________ into ______ - ANSWER- combine
chlorine, nitrogen gas
breakpoint chlorination equation - ANSWER- BPC = 10 x CC [BPC = 10 x (TC - FC)]
whole cyanuric acid range: _____ to ______ppm - ANSWER- 0, 100
ideal cyanuric acid range: _____ to ______ ppm - ANSWER- 30, 50
acts as a protection for chlorine compounds from UV light - ANSWER- cyanuric acid
CyA will act as a stabilizer for _______ but does not
stabilize ________ - ANSWER- free chlorine, bromine
The only way to reduce CyA concentration is to _______ - ANSWER- dilute the water
and replace it
whole range of bromine: ____ to _____ - ANSWER- 2, 10
ideal range of bromine: _____ to ______ - ANSWER- 4, 6
second most common disinfectant in the pool - ANSWER- bromine
two types of bromine used - ANSWER- sodium bromide, solid bromide
Bromine in natural form is a ______ but is in _____ form when
