POOL OPERATOR EXAM QUESTIONS
AND ANSWERS
wholed3ranged3chlorined3ind3ad3pool:d3____d3tod3_____d3-d3ans✔1,d35
ideald3ranged3chlorined3ind3ad3pool:d3____d3tod3_____d3-d3ans✔2,d34
wholed3ranged3chlorined3ind3ad3spa:d3____d3tod3_____d3-d3ans✔2,d310
ideald3ranged3chlorined3ind3ad3spa:d3____d3tod3_____d3-d3ans✔3,d35
4d3typesd3ofd3solidd3chlorined3-
d3ans✔calciumd3hypochlorite,d3lithiumd3hypochlorite,d3trichlor,d3dichlor
liquidd3chlorined3-d3ans✔sodiumd3hypochlorited3(NaOCl)
howd3actived3isd3gasd3chlorined3-d3ans✔100%
thed3actived3killingd3formd3ofd3chlorined3ind3waterd3-d3ans✔hypochlorousd3acidd3(HOCl)
HOCld3=d3______d3-d3ans✔H+d3(hydrogend3ion)d3+d3OCl-d3(hypochlorited3ion)
mostd3commond3granulard3chlorined3(pHd3range)d3-d3ans✔calciumd3hypochlorited3(8.5d3-
d311,d3usedd3tod3superd3chlorinated3water)
notd3commond3formd3ofd3chlorined3dued3tod3lowd3actived3strengthd3(pH)d3-
d3ans✔lithiumd3hypochlorited3(10.8)
tablet/stickd3chlorined3usuallyd3usedd3ind3erosiond3feederd3(pHd3-d3whatd3willd3itd3do?)d3-
d3ans✔trichlord3(2.8d3-d33.5,d3lowerd3alkalinityd3andd3pHd3overd3time)
saltd3usedd3asd3ad3disinfectantd3(pH)d3-d3ans✔dichlord3(6.7d3-
d3commond3ind3vinyld3linedd3pools)
mostd3commond3typed3ofd3chlorined3usedd3(pH)d3-
d3ans✔sodiumd3hypochlorited3(NaOCld3-d313)
, ______d3needsd3speciald3trainingd3tod3used3andd3hasd3ad3pHd3ofd3____d3andd3willd3____
_d3whend3addedd3tod3waterd3-d3ans✔gasd3chlorine,d30,d3lowerd3pH
chlorined3isd3mostd3effectived3asd3ad3pHd3ofd3_____d3-d3ans✔7.5
actived3disinfectantd3ind3thed3waterd3-d3ans✔freed3chlorined3(FC)
FCd3isd3determinedd3byd3thed3______d3testd3andd3isd3maintainedd3betweend3____d3andd
3____d3ppmd3-d3ans✔DPD,d32,d34
equald3tod3thed3amountd3ofd3hypochlorousd3acidd3(HOCl)d3andd3thed3amtd3ofd3hypochlori
ted3ionsd3(OCl-)d3-d3ans✔freed3chlorined3(fc)
thed3resultd3ofd3freed3chlorined3reactingd3withd3organicd3compoundsd3-
d3ans✔combined3chlorined3(CC)
commond3named3andd3maxd3ford3poolsd3andd3spasd3ford3combined3chlorined3-
d3ans✔chloramines,d30.2,d30.5
CCd3=d3-d3ans✔TCd3-d3FC
whatd3willd3ad3DPDd3measured3-d3ans✔TC,d3FC
howd3muchd3CCd3shouldd3ad3poold3haved3ideallyd3-d3ans✔zero
shockingd3thed3poold3isd3alsod3calledd3-d3ans✔breakpointd3chlorination
breakpointd3chlorinationd3isd3thed3conversiond3ofd3________d3intod3______d3-
d3ans✔combined3chlorine,d3nitrogend3gas
breakpointd3chlorinationd3equationd3-
d3ans✔BPCd3=d310d3xd3CCd3[BPCd3=d310d3xd3(TCd3-d3FC)]
wholed3cyanuricd3acidd3range:d3_____d3tod3______ppmd3-d3ans✔0,d3100
ideald3cyanuricd3acidd3range:d3_____d3tod3______d3ppmd3-d3ans✔30,d350
actsd3asd3ad3protectiond3ford3chlorined3compoundsd3fromd3UVd3lightd3-
d3ans✔cyanuricd3acid
CyAd3willd3actd3asd3ad3stabilizerd3ford3_______d3butd3doesd3not
stabilized3________d3-d3ans✔freed3chlorine,d3bromine
Thed3onlyd3wayd3tod3reduced3CyAd3concentrationd3isd3tod3_______d3-
d3ans✔diluted3thed3waterd3andd3replaced3it
AND ANSWERS
wholed3ranged3chlorined3ind3ad3pool:d3____d3tod3_____d3-d3ans✔1,d35
ideald3ranged3chlorined3ind3ad3pool:d3____d3tod3_____d3-d3ans✔2,d34
wholed3ranged3chlorined3ind3ad3spa:d3____d3tod3_____d3-d3ans✔2,d310
ideald3ranged3chlorined3ind3ad3spa:d3____d3tod3_____d3-d3ans✔3,d35
4d3typesd3ofd3solidd3chlorined3-
d3ans✔calciumd3hypochlorite,d3lithiumd3hypochlorite,d3trichlor,d3dichlor
liquidd3chlorined3-d3ans✔sodiumd3hypochlorited3(NaOCl)
howd3actived3isd3gasd3chlorined3-d3ans✔100%
thed3actived3killingd3formd3ofd3chlorined3ind3waterd3-d3ans✔hypochlorousd3acidd3(HOCl)
HOCld3=d3______d3-d3ans✔H+d3(hydrogend3ion)d3+d3OCl-d3(hypochlorited3ion)
mostd3commond3granulard3chlorined3(pHd3range)d3-d3ans✔calciumd3hypochlorited3(8.5d3-
d311,d3usedd3tod3superd3chlorinated3water)
notd3commond3formd3ofd3chlorined3dued3tod3lowd3actived3strengthd3(pH)d3-
d3ans✔lithiumd3hypochlorited3(10.8)
tablet/stickd3chlorined3usuallyd3usedd3ind3erosiond3feederd3(pHd3-d3whatd3willd3itd3do?)d3-
d3ans✔trichlord3(2.8d3-d33.5,d3lowerd3alkalinityd3andd3pHd3overd3time)
saltd3usedd3asd3ad3disinfectantd3(pH)d3-d3ans✔dichlord3(6.7d3-
d3commond3ind3vinyld3linedd3pools)
mostd3commond3typed3ofd3chlorined3usedd3(pH)d3-
d3ans✔sodiumd3hypochlorited3(NaOCld3-d313)
, ______d3needsd3speciald3trainingd3tod3used3andd3hasd3ad3pHd3ofd3____d3andd3willd3____
_d3whend3addedd3tod3waterd3-d3ans✔gasd3chlorine,d30,d3lowerd3pH
chlorined3isd3mostd3effectived3asd3ad3pHd3ofd3_____d3-d3ans✔7.5
actived3disinfectantd3ind3thed3waterd3-d3ans✔freed3chlorined3(FC)
FCd3isd3determinedd3byd3thed3______d3testd3andd3isd3maintainedd3betweend3____d3andd
3____d3ppmd3-d3ans✔DPD,d32,d34
equald3tod3thed3amountd3ofd3hypochlorousd3acidd3(HOCl)d3andd3thed3amtd3ofd3hypochlori
ted3ionsd3(OCl-)d3-d3ans✔freed3chlorined3(fc)
thed3resultd3ofd3freed3chlorined3reactingd3withd3organicd3compoundsd3-
d3ans✔combined3chlorined3(CC)
commond3named3andd3maxd3ford3poolsd3andd3spasd3ford3combined3chlorined3-
d3ans✔chloramines,d30.2,d30.5
CCd3=d3-d3ans✔TCd3-d3FC
whatd3willd3ad3DPDd3measured3-d3ans✔TC,d3FC
howd3muchd3CCd3shouldd3ad3poold3haved3ideallyd3-d3ans✔zero
shockingd3thed3poold3isd3alsod3calledd3-d3ans✔breakpointd3chlorination
breakpointd3chlorinationd3isd3thed3conversiond3ofd3________d3intod3______d3-
d3ans✔combined3chlorine,d3nitrogend3gas
breakpointd3chlorinationd3equationd3-
d3ans✔BPCd3=d310d3xd3CCd3[BPCd3=d310d3xd3(TCd3-d3FC)]
wholed3cyanuricd3acidd3range:d3_____d3tod3______ppmd3-d3ans✔0,d3100
ideald3cyanuricd3acidd3range:d3_____d3tod3______d3ppmd3-d3ans✔30,d350
actsd3asd3ad3protectiond3ford3chlorined3compoundsd3fromd3UVd3lightd3-
d3ans✔cyanuricd3acid
CyAd3willd3actd3asd3ad3stabilizerd3ford3_______d3butd3doesd3not
stabilized3________d3-d3ans✔freed3chlorine,d3bromine
Thed3onlyd3wayd3tod3reduced3CyAd3concentrationd3isd3tod3_______d3-
d3ans✔diluted3thed3waterd3andd3replaced3it
