CPO CLASS EXAM QUESTIONS AND
ANSWERS
What is negligence? - Answer-is failure to provide the appropriate standard of care to
the public.
What can moisture cause? - Answer-Moisture can cause a hazard if chemical is not
properly stored
What is Total alkalinity influenced by? - Answer-By High cyanuric acid
What is a type of titrimetric test method? - Answer-Ferrous ammonium sulfate (FAS-
DPD)
What is the best method to prevent electrocution? - Answer-Lock out/ tag out method
What requires the least amount of water to clean? - Answer-A cartridge fliter
When is Evaporation heat loss from a pool is highest when? - Answer-It is highest under
low relative humidity conditions
When should routine maintenance be preformed? - Answer-Before the pool opens each
day
What is required for handling and storing diatomaceous earth filter media - Answer-A
dust mask for safety
What causes strong chlorine odor and eye irritation - Answer-High levels of chloramines
in the pool area
How do you determine the level of combined chlorine in the water? - Answer-Test for
free chlorine and total chlorine. then subtract the free chlorine number from the total
chlorine number
What can be used to raise the total alkalinity level in the pool water? - Answer-Sodium
bicarbonate
What chemicals are used to neutralize chlorine? - Answer-Sodium sulfate and sodium
thiosulfate
What is the result if the alkalinity of the pool water is greater than 180 ppm - Answer-pH
lock
What should be the water depth of a spa? - Answer-48 inches
, What is electrical bonding? - Answer-It is the tying or fastening electrical devices to the
same ground potential
What is a typical spa timer set to? - Answer-15 minutes
What is the suggested ideal range for chlorine in a spa? - Answer-3.0 to 5.0 ppm
What is not symptom of hyperthermia - Answer-Decrease in the internal body
temperature
What is the minimum turnover rate for a therapy pool - Answer-is once every 4 hours
What causes the water to have a blue/green color - Answer-High levels of copper
What causes the water to have a red/brown color - Answer-High levels of iron
What causes air bubbles in the return pipe lines? - Answer-Its most likely caused by a
loose cover on the strainer basket
What method is considered more accurate than the colorimetric slide test - Answer-The
photometer test method
what DOT class material classification does sodium hypochlorite and muriatic acid
have? - Answer-A DOT class 8 corrosive material
What two chemicals create the "chlorine" smell in indoor facilities - Answer-
Dichloramine and nitrogen trichloride
What will increase if the pH drops? - Answer-The percent of HOCL (hypochlorous acid)
What happens if carbon dioxide is used to lower pH - Answer-the total alkalinity tends to
raise
What can cause scale formation - Answer-It can cause poor water balance and
excessive calcium hardness
what causes foam and suds in spas - Answer-Suntan lotions and body deodorants
What is the unit of measure for vacuum gauges - Answer-Inches of mercury
What is the life expectancy of a sand filter - Answer-5-15 years
What size particles can a diatomaceous earth fliter - Answer-Diatomaceous earth can
filter particles the size of blood cells from water
ANSWERS
What is negligence? - Answer-is failure to provide the appropriate standard of care to
the public.
What can moisture cause? - Answer-Moisture can cause a hazard if chemical is not
properly stored
What is Total alkalinity influenced by? - Answer-By High cyanuric acid
What is a type of titrimetric test method? - Answer-Ferrous ammonium sulfate (FAS-
DPD)
What is the best method to prevent electrocution? - Answer-Lock out/ tag out method
What requires the least amount of water to clean? - Answer-A cartridge fliter
When is Evaporation heat loss from a pool is highest when? - Answer-It is highest under
low relative humidity conditions
When should routine maintenance be preformed? - Answer-Before the pool opens each
day
What is required for handling and storing diatomaceous earth filter media - Answer-A
dust mask for safety
What causes strong chlorine odor and eye irritation - Answer-High levels of chloramines
in the pool area
How do you determine the level of combined chlorine in the water? - Answer-Test for
free chlorine and total chlorine. then subtract the free chlorine number from the total
chlorine number
What can be used to raise the total alkalinity level in the pool water? - Answer-Sodium
bicarbonate
What chemicals are used to neutralize chlorine? - Answer-Sodium sulfate and sodium
thiosulfate
What is the result if the alkalinity of the pool water is greater than 180 ppm - Answer-pH
lock
What should be the water depth of a spa? - Answer-48 inches
, What is electrical bonding? - Answer-It is the tying or fastening electrical devices to the
same ground potential
What is a typical spa timer set to? - Answer-15 minutes
What is the suggested ideal range for chlorine in a spa? - Answer-3.0 to 5.0 ppm
What is not symptom of hyperthermia - Answer-Decrease in the internal body
temperature
What is the minimum turnover rate for a therapy pool - Answer-is once every 4 hours
What causes the water to have a blue/green color - Answer-High levels of copper
What causes the water to have a red/brown color - Answer-High levels of iron
What causes air bubbles in the return pipe lines? - Answer-Its most likely caused by a
loose cover on the strainer basket
What method is considered more accurate than the colorimetric slide test - Answer-The
photometer test method
what DOT class material classification does sodium hypochlorite and muriatic acid
have? - Answer-A DOT class 8 corrosive material
What two chemicals create the "chlorine" smell in indoor facilities - Answer-
Dichloramine and nitrogen trichloride
What will increase if the pH drops? - Answer-The percent of HOCL (hypochlorous acid)
What happens if carbon dioxide is used to lower pH - Answer-the total alkalinity tends to
raise
What can cause scale formation - Answer-It can cause poor water balance and
excessive calcium hardness
what causes foam and suds in spas - Answer-Suntan lotions and body deodorants
What is the unit of measure for vacuum gauges - Answer-Inches of mercury
What is the life expectancy of a sand filter - Answer-5-15 years
What size particles can a diatomaceous earth fliter - Answer-Diatomaceous earth can
filter particles the size of blood cells from water
