Pool Operator’s Test

phenol red
used to measure pH
parallel
valves are open if handle is ______ to the pipe
pH
how acidic or basic a solution (pool water) is
60 to 180
acceptable range of Total Alkalinity in a pool
7.2 to 7.8
acceptable range of pH in a pool
150 to 400
acceptable range of calcium hardness in a pool
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1500
maximum reading for total dissolved solids (TDS)
7.5
pH of a human eye
15 minutes
maximum time someone should spend in a spa
8 hours
maximum turnover rate for a main pool
2 hours
maximum turnover rate for a wading pool
30 minutes
maximum turnover rate for a spa
104
maximum temperature for a spa is _____ degrees
-0.5 – +0.5
acceptable range for the Langelier Saturation Index
flow meter
instrument that measures how fast the water is returning to the pool after it has been cleaned
parts per million
the rate of flow is measured in…
effluent line
other name for return line
DPD #1 and #2
to measure free available chlorine the reagents should be…
floculent
filter aid that makes small dirt bigger
cyanuric acid
chemical that stabilizes chlorine against ultraviolet light of the sun
1.5
minimum reading for chlorine in a main pool
3
minimum reading for chlorine in a wading pool
pre-coat
the process of preparing cartridges for a DE filter prior to turning the pump on is called…
slurry feed
adding DE to the filter while the pump is running
sodium hydrochlorite
chemical name for liquid chlorine
scaling
mineral deposits on the wall or in the pipes
breakpoint
the point at which the chlorine is raised to 10 times the combined chlorine level and all of the chloramines are oxidized
flow rate
amount of water per minute that is returning back to the pool
MSDS
This stands for Material Safety Data Sheets and are required by OSHA (Occupational Safety and Health Administration). These sheets provide complete information on the chemicals being used
impeller
instrument inside the motor that creates the vacuum pressure that pulls the water through the system
backwash
the reverse of flow of water through the filter tanks in order to clean the system
valves
control the flow of water in the system: ex. gate, floating, ball, butterfly
free available chlorine
chlorine that is available for disinfection in the water
priming the pump
process that provides a system enough water to being filtering prior to the pump being turned on
chloramines
aka combined chlorine. chlorine that has already connected with ammonia or nitrogen and is no longer useful for disinfection, high levels leave strong odor and cloudy water
influent lines
lines that bring water into the system (main drain, skimmers, vacuum)
combined chlorine
ineffective chlorine (aka chloramines) which level is found by subtracting the free available chlorine from the total available chlorine
total dissolved solids
TDS; matter that is in the water that is unable to be reduced or eliminated with chemicals
sequestering agent
a chemical that is added to water which PREVENTS staining by keeping minerals and metal in the water color free
hair and lint strainer
serves as protection to the motor by preventing large debris from damaging the impeller; located before motor
superchlorination
process of surpassing breakpoint by raising the free available chlorine level to at least 10 to 15 ppm
total alkalinity
the buffering capacity of the water to maintain its current level of pH; defined as amount of carbonates and bicarbonates in the water
gauges
used to measure the pressure in the system
causes of scaling
too high alkalinity, pH, calcium hardness
causes of corrosion
too low pH, alkalinity or calcium hardness