IPOOL OPERATORS COURSE
QUESTIONS WITH COMPLETE
SOLUTION
The CDC estimates that approximately how many water related injuries occur annually? - 140000
To prevent spinal injuries when diving in pools, what needs to happen? - "No diving" markers should be
present, no diving in under 6 feet of water, and only diving from diving boards or stands should be
allowed
Built in stairs are commonly used in what end of pools and must have what? - Shallow ends and secure
handrails
Who is responsible for maintaining the daily pool operation log? - The certified pool operator
What is the strongest point of suction in a pool that may lead to entrapment and drowning of a bather? -
The main drain
There must be how many ladders or stairways provided in a pool for adequate access and egress for
swimmers? - Two
What is the physical process of removing suspended particles from the pool water called? - Filtration
As dirt accumulates inside a filter, the amount of water that can pass through the filter... - Decreases
What is a damaging condition that occurs over time in a sand filter? - Channeling
What is the process of removing accumulated particles from inside a sand filter? - Backwashing
High rate sand filters typically have a filter rate of how many gallons per minute per square foot? - 15-25
The volume of water going through a filter system in measured in... - Gallons per minute
The turnover rate for a swimming pool is every... - 6 hours
What is the equation for a surface area of a rectangular or square pool? - Length x width = surface area
What is the equation for surface area of a circular pool? - 3.14 (pie) x r^2 = surface area (r=radius)
What is the equation for the volume of a swimming pool? - Length x width x depth x 7.48 = volume
The amount of time it takes for the total volume of pool water to pass through the circulation system is
the... - Turnover rate
What is the equation for minimum required flow rate? - (Volume of pool/turnover rate)/60=flow rate
, Alger primarily forms in a swimming pool because of... - Poor water circulation
_________ can penetrate into the plaster of the pool surface and cause damage (being the most difficult
type of algae to control) - Black algea
The pool must be ______ and _____ in order to remove stains from the interior pool surface - Drained
and acid washed
_________ requires special handling, is heavier than air and must be stored in rooms that are well
ventilated. - Chlorine gas
What is the recommended level of free chlorine in a swimming pool? - 1 to 10 parts per million (ppm)
Shocking the pol with chlorine can... - Remove a chlorine odor emanating from a pool (which is usually
chloramines)
What will sanitize the water and prevent the growth of algae? - Adding chlorine to water
What will rise the pH? - Adding liquid or dry chlorine to pool water
When should the pool operator close the pool? - If he ever finds the water has become cloudy and he
cannot see the main drain
What does chlorine do? - Kills germs and oxidizes organic matter in pool water
What should happen when performing superchlorination to oxidize the combined chlorines? - The level
of free chlorine should be raised to ten times the level of combined chlorines in the pool water
What is the maximum safe temperature of spa pool water? - 104 degrees Fahrenheit
The main drain located in the deep end does what? - Removes sediments
A sequestering agent may be used in a pool to... - Prevent precipitation of minerals on pool surfaces
What will lead to an accelerated growth of algae in pools? - Sunlight, hot weather, and high bather load
What can cause microorganisms to be shielded from disinfectants if they are suspended particles? - High
turbidity levels
What can cause cloudy water? - Filtration malfunction, excessive bather load, and chemical imbalance
A filter backwash cycle for a sand filter is complete when the backwash water... - Appears clear in the
sight glass
When there is no chlorine in the vat, the injection fitting on the filter system is... - Clogged or the tube
assembly needs to be changed (it could cause the hypo chlorinator to not work)
If there is no chlorine in the water and the pool operator has to hand-feed chlorine into the pool... - You
must wait 30 minutes before allowing people to use the pool
A pool operator needs to... - Perform basic tasks such as monitoring the chemical condition of the pool
and making adjustments
QUESTIONS WITH COMPLETE
SOLUTION
The CDC estimates that approximately how many water related injuries occur annually? - 140000
To prevent spinal injuries when diving in pools, what needs to happen? - "No diving" markers should be
present, no diving in under 6 feet of water, and only diving from diving boards or stands should be
allowed
Built in stairs are commonly used in what end of pools and must have what? - Shallow ends and secure
handrails
Who is responsible for maintaining the daily pool operation log? - The certified pool operator
What is the strongest point of suction in a pool that may lead to entrapment and drowning of a bather? -
The main drain
There must be how many ladders or stairways provided in a pool for adequate access and egress for
swimmers? - Two
What is the physical process of removing suspended particles from the pool water called? - Filtration
As dirt accumulates inside a filter, the amount of water that can pass through the filter... - Decreases
What is a damaging condition that occurs over time in a sand filter? - Channeling
What is the process of removing accumulated particles from inside a sand filter? - Backwashing
High rate sand filters typically have a filter rate of how many gallons per minute per square foot? - 15-25
The volume of water going through a filter system in measured in... - Gallons per minute
The turnover rate for a swimming pool is every... - 6 hours
What is the equation for a surface area of a rectangular or square pool? - Length x width = surface area
What is the equation for surface area of a circular pool? - 3.14 (pie) x r^2 = surface area (r=radius)
What is the equation for the volume of a swimming pool? - Length x width x depth x 7.48 = volume
The amount of time it takes for the total volume of pool water to pass through the circulation system is
the... - Turnover rate
What is the equation for minimum required flow rate? - (Volume of pool/turnover rate)/60=flow rate
, Alger primarily forms in a swimming pool because of... - Poor water circulation
_________ can penetrate into the plaster of the pool surface and cause damage (being the most difficult
type of algae to control) - Black algea
The pool must be ______ and _____ in order to remove stains from the interior pool surface - Drained
and acid washed
_________ requires special handling, is heavier than air and must be stored in rooms that are well
ventilated. - Chlorine gas
What is the recommended level of free chlorine in a swimming pool? - 1 to 10 parts per million (ppm)
Shocking the pol with chlorine can... - Remove a chlorine odor emanating from a pool (which is usually
chloramines)
What will sanitize the water and prevent the growth of algae? - Adding chlorine to water
What will rise the pH? - Adding liquid or dry chlorine to pool water
When should the pool operator close the pool? - If he ever finds the water has become cloudy and he
cannot see the main drain
What does chlorine do? - Kills germs and oxidizes organic matter in pool water
What should happen when performing superchlorination to oxidize the combined chlorines? - The level
of free chlorine should be raised to ten times the level of combined chlorines in the pool water
What is the maximum safe temperature of spa pool water? - 104 degrees Fahrenheit
The main drain located in the deep end does what? - Removes sediments
A sequestering agent may be used in a pool to... - Prevent precipitation of minerals on pool surfaces
What will lead to an accelerated growth of algae in pools? - Sunlight, hot weather, and high bather load
What can cause microorganisms to be shielded from disinfectants if they are suspended particles? - High
turbidity levels
What can cause cloudy water? - Filtration malfunction, excessive bather load, and chemical imbalance
A filter backwash cycle for a sand filter is complete when the backwash water... - Appears clear in the
sight glass
When there is no chlorine in the vat, the injection fitting on the filter system is... - Clogged or the tube
assembly needs to be changed (it could cause the hypo chlorinator to not work)
If there is no chlorine in the water and the pool operator has to hand-feed chlorine into the pool... - You
must wait 30 minutes before allowing people to use the pool
A pool operator needs to... - Perform basic tasks such as monitoring the chemical condition of the pool
and making adjustments
