Pool and Spa Operator Exam Questions
with Verified Answers <Brand New
Version>
1. whole range chlorine in a pool: ____ to _____ - ANSWER 1, 5
2. formula volume is - ANSWER length x width by depth by 7.48 (num. x
num. x num. x 7.48)
3. To measure the area for circular pool - ANSWER 3.14 r^2
4. If you see bubbles coming up from a return, the possible cause could be -
ANSWER a bad seal on the hair/lint strainer - it is not properly closed, or air
is in the filter, or water level is too low
5. The hypochlorinator doesn't work. What could be a possible cause for this?
a) no chlorine in the vat
b) the injection fitting is clogged
c) the tube assembly needs to be changed
d) all of the above - ANSWER d) all of the above
6. removing dirt/particles from filter - ANSWER backwashing
7. Electrical system at pool must have - ANSWER GFI's
8. The skimmer - ANSWER weir prevents floating material from re-entering
the pool.
,9. how active is gas chlorine - ANSWER 100%
10.the active killing form of chlorine in water - ANSWER hypochlorous acid
(HOCl)
11.HOCl = ______ - ANSWER H+ (hydrogen ion) + OCl- (hypochlorite ion)
12.most common granular chlorine (pH range) - ANSWER calcium
hypochlorite (8.5 - 11, used to super chlorinate water)
13.not common form of chlorine due to low active strength (pH) - ANSWER
lithium hypochlorite (10.8)
14.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)
15.salt used as a disinfectant (pH) - ANSWER dichlor (6.7 - common in vinyl
lined pools)
16.most common type of chlorine used (pH) - ANSWER sodium hypochlorite
(NaOCl - 13)
17.______ needs special training to use and has a pH of ____ and will _____
when added to water - ANSWER gas chlorine, 0, lower pH
18.chlorine is most effective as a pH of _____ - ANSWER 7.5
, 19.active disinfectant in the water - ANSWER free chlorine (FC)
20.FC is determined by the ______ test and is maintained between ____ and
____ ppm - ANSWER DPD, 2, 4
21.equal to the amount of hypochlorous acid (HOCl) and the amt of
hypochlorite ions (OCl-) - ANSWER free chlorine (fc)
22.the result of free chlorine reacting with organic compounds - ANSWER
combine chlorine (CC)
23.two types of bromine used - ANSWER sodium bromide, solid bromide
24.Bromine in natural form is a ______ but is in _____ form when
added to pools - ANSWER reddish brown liquid, solid
25.__________ is similar to hypochlorous acid - ANSWER hypobromous acid
26.bromine releases _____ and _____ when added to water - ANSWER
hypobromite ion, hydrogen ion
27.bromine will ______ pH when added to water - ANSWER lower
28.whole range of pH: ____to_____ - ANSWER 7.2, 7.8
29.ideal range of pH: ____ to ____ - ANSWER 7.4, 7.6
with Verified Answers <Brand New
Version>
1. whole range chlorine in a pool: ____ to _____ - ANSWER 1, 5
2. formula volume is - ANSWER length x width by depth by 7.48 (num. x
num. x num. x 7.48)
3. To measure the area for circular pool - ANSWER 3.14 r^2
4. If you see bubbles coming up from a return, the possible cause could be -
ANSWER a bad seal on the hair/lint strainer - it is not properly closed, or air
is in the filter, or water level is too low
5. The hypochlorinator doesn't work. What could be a possible cause for this?
a) no chlorine in the vat
b) the injection fitting is clogged
c) the tube assembly needs to be changed
d) all of the above - ANSWER d) all of the above
6. removing dirt/particles from filter - ANSWER backwashing
7. Electrical system at pool must have - ANSWER GFI's
8. The skimmer - ANSWER weir prevents floating material from re-entering
the pool.
,9. how active is gas chlorine - ANSWER 100%
10.the active killing form of chlorine in water - ANSWER hypochlorous acid
(HOCl)
11.HOCl = ______ - ANSWER H+ (hydrogen ion) + OCl- (hypochlorite ion)
12.most common granular chlorine (pH range) - ANSWER calcium
hypochlorite (8.5 - 11, used to super chlorinate water)
13.not common form of chlorine due to low active strength (pH) - ANSWER
lithium hypochlorite (10.8)
14.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)
15.salt used as a disinfectant (pH) - ANSWER dichlor (6.7 - common in vinyl
lined pools)
16.most common type of chlorine used (pH) - ANSWER sodium hypochlorite
(NaOCl - 13)
17.______ needs special training to use and has a pH of ____ and will _____
when added to water - ANSWER gas chlorine, 0, lower pH
18.chlorine is most effective as a pH of _____ - ANSWER 7.5
, 19.active disinfectant in the water - ANSWER free chlorine (FC)
20.FC is determined by the ______ test and is maintained between ____ and
____ ppm - ANSWER DPD, 2, 4
21.equal to the amount of hypochlorous acid (HOCl) and the amt of
hypochlorite ions (OCl-) - ANSWER free chlorine (fc)
22.the result of free chlorine reacting with organic compounds - ANSWER
combine chlorine (CC)
23.two types of bromine used - ANSWER sodium bromide, solid bromide
24.Bromine in natural form is a ______ but is in _____ form when
added to pools - ANSWER reddish brown liquid, solid
25.__________ is similar to hypochlorous acid - ANSWER hypobromous acid
26.bromine releases _____ and _____ when added to water - ANSWER
hypobromite ion, hydrogen ion
27.bromine will ______ pH when added to water - ANSWER lower
28.whole range of pH: ____to_____ - ANSWER 7.2, 7.8
29.ideal range of pH: ____ to ____ - ANSWER 7.4, 7.6
