CPO POOL OPERATOR EXAM
Questions and Answers
1. whole range chlorine in a pool; to
Answer 1, 5
2. ideal range chlorine in a pool; to
Answer 2, 4
3. whole range chlorine in a spa; to
Answer 2, 10
4. ideal range chlorine in a spa; to
Answer 3, 5
5. 4 types of solid chlorine
Answer calcium hypochlorite, lithium hypochlorite, trichlor, dichlor
6. liquid chlorine
Answer sodium hypochlorite (NaOCl)
1/
16
,7. how active is gas chlorine
Answer 100%
8. the active killing form of chlorine in water
Answer hypochlorous acid (HOCl)
9. HOCl =
Answer H+ (hydrogen ion) + OCl- (hypochlorite ion)
10. most common granular chlorine (pH range)
Answer calcium hypochlorite (8.5 - 11, used to super chlorinate water)
11. not common form of chlorine due to low active strength (pH)
Answer lithium hypochlorite (10.8)
12. 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)
13. salt used as a disinfectant (pH)
Answer dichlor (6.7 - common in vinyl lined pools)
2/
16
, 14. most common type of chlorine used (pH)
Answer sodium hypochlorite (NaOCl - 13)
15. needs special
training to use and has a pH of and will
when added to water
Answer gas chlorine, 0, lower Ph
16. chlorine is most effective as a
pH of
Answer 7.5
17. active disinfectant in the water
Answer free chlorine (FC)
18. FC is determined by the test and
is maintained between and
ppm
Answer DPD, 2, 4
19. equal to the amount of hypochlorous acid (HOCl) and the amt
of hypochlorite ions (OCl-)
Answer free chlorine (fc)
3/
16
Questions and Answers
1. whole range chlorine in a pool; to
Answer 1, 5
2. ideal range chlorine in a pool; to
Answer 2, 4
3. whole range chlorine in a spa; to
Answer 2, 10
4. ideal range chlorine in a spa; to
Answer 3, 5
5. 4 types of solid chlorine
Answer calcium hypochlorite, lithium hypochlorite, trichlor, dichlor
6. liquid chlorine
Answer sodium hypochlorite (NaOCl)
1/
16
,7. how active is gas chlorine
Answer 100%
8. the active killing form of chlorine in water
Answer hypochlorous acid (HOCl)
9. HOCl =
Answer H+ (hydrogen ion) + OCl- (hypochlorite ion)
10. most common granular chlorine (pH range)
Answer calcium hypochlorite (8.5 - 11, used to super chlorinate water)
11. not common form of chlorine due to low active strength (pH)
Answer lithium hypochlorite (10.8)
12. 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)
13. salt used as a disinfectant (pH)
Answer dichlor (6.7 - common in vinyl lined pools)
2/
16
, 14. most common type of chlorine used (pH)
Answer sodium hypochlorite (NaOCl - 13)
15. needs special
training to use and has a pH of and will
when added to water
Answer gas chlorine, 0, lower Ph
16. chlorine is most effective as a
pH of
Answer 7.5
17. active disinfectant in the water
Answer free chlorine (FC)
18. FC is determined by the test and
is maintained between and
ppm
Answer DPD, 2, 4
19. equal to the amount of hypochlorous acid (HOCl) and the amt
of hypochlorite ions (OCl-)
Answer free chlorine (fc)
3/
16
