SWIMMING POOL OPERATOR CERTIFICATION |
NEWEST VERSION|2025/2026
Procedures for form stool that is solid and not liquid correct answers Raise the free available
chlorine level to 2 ppm and ensure that the pH is between 7.2 and 7.5
Maintain the chlorine concentration for at least 25 minutes. Ensure this concentration is found
throughout all waters by sampling at least three widely spaced locations away from return outlets
Procedures for diarrhea liquid or non-form stools correct answers Raise the free available
chlorine level two 20 ppm and ensure that the pH is between 7.2 and 7.5
Maintain the chlorine concentration and pH for eight hours while ensuring that the filtration
system is operating. Backwash the filter thoroughly discharging the effluent directly to waste.
Where appropriate replace the filter media
Bathers may be allowed into pool after chlorine concentration has been returned to normal
operating ranges
Acid demand correct answers The amount of acid required to reduce pH and alkalinity to the
correct range
Algae correct answers Microscopic plant like organisms that grow in water do to warm
temperatures and in adequate sanitizer. Algae can be green blue green black or yellow green
(mustard).
Alkalinity correct answers A measure of the ability of pool water to resist changes in pH.
Buffering capacity of water.
Balanced water correct answers The correct ratio of hardness, alkalinity, temperature, dissolved
solids, and pH that prevent pool water from being either corrosive or scale forming
Bromine correct answers A chemical element that exists as a liquid in its elemental form or as
part of a chemical compound that is an oxidant and a biocidal agent used to disinfect pool, spa
and hot tub water.
Bromamine correct answers Bromine-ammonia compounds formed when the bromine in the
water combines with ammonia, nitrogen or swimmer or bather waste. Unlike Chloramines they
do not smell or irritate the body. They are active sanitizers.
Calcium hardness correct answers The amount of dissolved calcium in the pool. High levels
promote scale and cloudy water. Low levels promote corrosion of the pool or spa equipment.
Cavitation correct answers Formation of partial vacuums when the pump exceeds the water
supply
, Chlorine correct answers A chemical element that exists as a gas in its elemental form or as a
part of a chemical compound that is an oxidant and a biocidal agent used in pool, spa, and hot
tub disinfection
Chlorine demand correct answers The amount of chlorine necessary to destroy the germs, algae,
and other impurities in the water. Demand refers to the amount required before chlorine can be
made available to continue sanitizing the pool, spa, or hot tub water.
Chloramines correct answers A compound formed when chlorine combines with ammonia,
nitrogen, or swimmer or bather wastes. They cause eye and skin irritation, and they have a strong
objectionable odor.
Chlorine residual correct answers The amount of measurable chlorine remaining after treating
water with chlorine to disinfect and oxidize contaminants. It may also be explained as the
amount of chlorine left after satisfying the chlorine demand.
Free available chlorine (FAC) correct answers The portion of total chlorine remaining in
chlorinated water that is not combined with ammonia or nitrogen compounds and will react
chemically with undesirable or disease causing organisms
Conditioner correct answers Also called cyanuric acid, stabilizer, Isocyanuric acid and
Triazinetrione-A chemical that helps reduce the excessive loss of chlorine in water due to
ultraviolet rays of the sun.
Copper correct answers Metallic element that forms compounds causing green or blue green
water, green or blue green stains in pool or spa surfaces and green hair or blue fingernails on
swimmers and bathers.
Cross connection correct answers An unprotected connection between a domestic water supply
and the pool. Protective devices must be used to eliminate possible contamination.
DPD correct answers (Diethel-P-Phenylene Diamine) A reagent and test method that specifically
measures the free available chlorine and total chlorine. It produces a series of colors from pink to
red.
Flow meter correct answers A device that measures pressure differential across a calibrated
orifice and indicates a rate of flow at that point usually given in gallons per minutes
Hard water correct answers Water that has a high level of calcium and magnesium dissolved in it
Iron correct answers A metallic element that forms compounds causing orange or brown colored
water and orange or brown colored stains on pool or spa walls
Oxidation reduction potential correct answers A method of measuring the potential, which often
relates to the concentration of an oxidizer in the pool water. ORP probes send signals to
NEWEST VERSION|2025/2026
Procedures for form stool that is solid and not liquid correct answers Raise the free available
chlorine level to 2 ppm and ensure that the pH is between 7.2 and 7.5
Maintain the chlorine concentration for at least 25 minutes. Ensure this concentration is found
throughout all waters by sampling at least three widely spaced locations away from return outlets
Procedures for diarrhea liquid or non-form stools correct answers Raise the free available
chlorine level two 20 ppm and ensure that the pH is between 7.2 and 7.5
Maintain the chlorine concentration and pH for eight hours while ensuring that the filtration
system is operating. Backwash the filter thoroughly discharging the effluent directly to waste.
Where appropriate replace the filter media
Bathers may be allowed into pool after chlorine concentration has been returned to normal
operating ranges
Acid demand correct answers The amount of acid required to reduce pH and alkalinity to the
correct range
Algae correct answers Microscopic plant like organisms that grow in water do to warm
temperatures and in adequate sanitizer. Algae can be green blue green black or yellow green
(mustard).
Alkalinity correct answers A measure of the ability of pool water to resist changes in pH.
Buffering capacity of water.
Balanced water correct answers The correct ratio of hardness, alkalinity, temperature, dissolved
solids, and pH that prevent pool water from being either corrosive or scale forming
Bromine correct answers A chemical element that exists as a liquid in its elemental form or as
part of a chemical compound that is an oxidant and a biocidal agent used to disinfect pool, spa
and hot tub water.
Bromamine correct answers Bromine-ammonia compounds formed when the bromine in the
water combines with ammonia, nitrogen or swimmer or bather waste. Unlike Chloramines they
do not smell or irritate the body. They are active sanitizers.
Calcium hardness correct answers The amount of dissolved calcium in the pool. High levels
promote scale and cloudy water. Low levels promote corrosion of the pool or spa equipment.
Cavitation correct answers Formation of partial vacuums when the pump exceeds the water
supply
, Chlorine correct answers A chemical element that exists as a gas in its elemental form or as a
part of a chemical compound that is an oxidant and a biocidal agent used in pool, spa, and hot
tub disinfection
Chlorine demand correct answers The amount of chlorine necessary to destroy the germs, algae,
and other impurities in the water. Demand refers to the amount required before chlorine can be
made available to continue sanitizing the pool, spa, or hot tub water.
Chloramines correct answers A compound formed when chlorine combines with ammonia,
nitrogen, or swimmer or bather wastes. They cause eye and skin irritation, and they have a strong
objectionable odor.
Chlorine residual correct answers The amount of measurable chlorine remaining after treating
water with chlorine to disinfect and oxidize contaminants. It may also be explained as the
amount of chlorine left after satisfying the chlorine demand.
Free available chlorine (FAC) correct answers The portion of total chlorine remaining in
chlorinated water that is not combined with ammonia or nitrogen compounds and will react
chemically with undesirable or disease causing organisms
Conditioner correct answers Also called cyanuric acid, stabilizer, Isocyanuric acid and
Triazinetrione-A chemical that helps reduce the excessive loss of chlorine in water due to
ultraviolet rays of the sun.
Copper correct answers Metallic element that forms compounds causing green or blue green
water, green or blue green stains in pool or spa surfaces and green hair or blue fingernails on
swimmers and bathers.
Cross connection correct answers An unprotected connection between a domestic water supply
and the pool. Protective devices must be used to eliminate possible contamination.
DPD correct answers (Diethel-P-Phenylene Diamine) A reagent and test method that specifically
measures the free available chlorine and total chlorine. It produces a series of colors from pink to
red.
Flow meter correct answers A device that measures pressure differential across a calibrated
orifice and indicates a rate of flow at that point usually given in gallons per minutes
Hard water correct answers Water that has a high level of calcium and magnesium dissolved in it
Iron correct answers A metallic element that forms compounds causing orange or brown colored
water and orange or brown colored stains on pool or spa walls
Oxidation reduction potential correct answers A method of measuring the potential, which often
relates to the concentration of an oxidizer in the pool water. ORP probes send signals to
