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The CDC estimates ______ water-related injuries occur annually - ✔✔140,000
To prevent spinal injuries when diving in pools ____ markers should be present -
✔✔"no diving"
No diving under _____ feet of water should be allowed, and diving should be allowed
from diving boards or stands - ✔✔6
______ are commonly used in the shallow end of pools and must have a secure____ -
✔✔Built-in stairs
handrail
The certified pool op is responsible for maintaining the ______ - ✔✔daily pool operation
log
main drain - ✔✔Strongest point of suction in a pool that may lead to entrapment and
drowning of a bather
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, There much be at least __ ladders or stairways provided in a pool for adequate access
and egress for swimmers - ✔✔2
Filtration - ✔✔the physical process of removing suspended particles from the pool
water
As dirt accumulates inside a filter - ✔✔the amount of water that can pass through the
filter decreases
Channeling - ✔✔A damaging condition that occurs over time in a sand filter
Backwashing - ✔✔the process of removing accumulated particles from inside a sand
filter
High-rate sand filters typically have a filter rate of ___ gallons per minute per square
foot - ✔✔15-25
Gallons per Minute (gpm) - ✔✔how the volume of water going through the filter
system is measured
The turnover rate for a swimming pool is every - ✔✔6 hours
Equation for surface area of a rectangular /square pool - ✔✔Length x Width = SA
Equation for Surface Area of a circular pool - ✔✔Pi x Radius ^2 = SA
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