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CERTIFIED POOL OPERATOR 2 PRACTICE
STUDY GUIDE 2026 SOLVED QUESTIONS
โ RWI stands for. Answer: Recreational Water illness โ How are recreational water illnesses spread. Answer: Swallowing water Breathing in mists Coming in contact with contaminated water โ Recreational Water Illness. Answer: illness caused by microorganisms and chloramines in water โ common illness caused by chloramines. Answer: Breathing disorder called swimmers asthma โ examples of microorganisms that can make you sick in pools. Answer: Pseudomonas aeruginosa E.coli Staph Crypto
โ interior walls of pool. Answer: pool plaster or white coat โ what do pool pumps do?. Answer: They poll water form the pool main drains and skimmers โ pool main drain. Answer: point of strongest suction in the pool โ Reasons to close pool immediately. Answer: Main drain cover is broken or missing Main drain is not visible due to cloudy water pool telephone not working โ Skimmers. Answer: water from surface passes through skimmers and debris get trapped in skimmer basket โ Skimmer Weir. Answer: prevents floating debris from reentering the pool โ where does water go after going through the pump?. Answer: filter โ where does water go after the filter?. Answer: heater
โ what does it mean if flow meter is showing lower flow than is should?. Answer: Usually means the filter needs to be cleaned or there is too much debris in the strainer basket or skimmer basket โ 3 Types of Filters. Answer: 1. Sand Filter
- Cartridge Filter
- D.E. Filter โ Filtration. Answer: the physical process of removing suspended particles form pool water โ how to clean cartridge filter. Answer: soak cartridge in degreaser and hose off โ how to clean a sand filter. Answer: backwash โ Backwash. Answer: the process of reverse flow of water through the sand filter to remove accumulated particles โ when to backwash. Answer: when sand filter pressure gauge is higher than usual (spa 8-10 or higher) โ when can you stop backwashing. Answer: when water in sight glass appears to be clear
โ how often should in a sand filter be replaced. Answer: every 3- 5 years โ Channeling. Answer: a damaging condition that occurs over time in sand filters. When sand becomes hard, water goes around sand and unfiltered water returns to the pool โ most efficient type of filter and why. Answer: D.E. filter because it can trap particles up to 3-5 microns โ what happens when dirt accumulates in a filter?. Answer: the amount of water that can pass through the filter decreases โ Labels and Postings. Answer: Valves and pumps in the pump room must be labeled and operating instructions must be posted. โ Pool turnover rate. Answer: the amount of time that it takes all of the water in the pool to pass though the filter โ 3 Types of Pool Algae. Answer: Green, Black, Mustard โ Reasons algae forms in pools. Answer: bad water circulation low chlorine level
โ Hypochlorinator. Answer: used for liquid chlorine โ Total Chlorine in pool idea levels. Answer: 1-3 ppm โ Total Chlorine in spa idea levels. Answer: 3-5ppm โ PPM. Answer: parts per million- describes the concentration of something in water or soil โ Shocking. Answer: aka super chlorination it is the process of raising free chlorine three to five times higher than the normal amount level. (10 times the amount of the level of chloramines in the water) โ breakpoint chlorination. Answer: the process of separating combined chlorines by increasing chlorine amount. Combined chlorines produce chloramines which create poor air quality. This breakpoint chlorination improves air quality. โ if the chlorine level is too high what do you add?. Answer: sodium thiosulfate (Dechlor)
โ advantage of bromine. Answer: more stable at higher temperatures than chlorine โ bromine disadvantage. Answer: more expensive, harder to find in stores, not as stable in the sun โ Salt Chlorine Generator. Answer: used in pools that use salt as the sanitizer turns salt into hypochlorous acid โ When chorine is added to water what does it become?. Answer: hypochlorous acid and hydrogen โ ideal pH for pool. Answer: 7.2-7.8 ppm โ ideal total Alkalinity for pool. Answer: 80-120 ppm โ ideal calcium hardness for a pool. Answer: 200-400 ppm โ ideal calcium hardness for a spa. Answer: 150-250 ppm โ idea cyanuric acid for pool. Answer: no more than 50 ppm
โ Muriatic Acid. Answer: decreases pH (makes less basic) โ Scientific name for Soda Ash. Answer: Sodium Carbonate โ Symptoms of low pH. Answer: corrosive water etching of pool/spa surface corrosion of metals staining of surface walls chlorine loss wrinkles in vinyl lines eye/skin irritation โ Symptoms of high pH. Answer: scaling water clogged filters clogged heater elements reduced circulation cloudy water chlorine inefficiency eye/skin irritation โ Adding liquid chlorine will do what to pH. Answer: Adding liquid chlorine will raise pH
โ symptoms of low total Alkalinity. Answer: pH Bounce Etching of pool/spa surface staining of surface walls heater failure โ symptoms of high total alkalinity. Answer: pH Lock Cloudy water Rough pool/spa surfaces Clogged filters clogged heater elements reduced circulation โ what do you add to raise Alkalinity. Answer: Sodium Bicarbonate โ symptoms of low calcium hardness. Answer: corrosive water etching of pool/spa surface staining of surface walls heater failure โ symptoms of high calcium hardness. Answer: Scaling water rough pool/spa surfaces
โ Total Dissolved solids. Answer: measurement of everything that has dissolved in the pool water โ what to do if TDS level is 1500 ppm or above?. Answer: drain some or all water and refill with fresh water โ Saturation index formula. Answer: pH+ temperature +calcium+Alkalinity - TDS โ Balanced water total saturation result. Answer: - 0.3 -- +0. โ how many drowning deaths in US every year. Answer: 3, โ half of all drownings occur in how much water?. Answer: 4-6 feet of water โ what does drowning sound like. Answer: 95% of drowning victims are silent โ what does GFCIs stand for. Answer: Ground-Fault Circuit Interrupters
โ maximum temperature in a spa. Answer: 104 degrees F โ how is 50% of pool temperature lost. Answer: evaporation โ causes for foam on a spa. Answer: contaminants hair care products such as shampoo, hair spray body lotion and deoderant makeup laundry detergent or soap โ depth markers. Answer: should be provided very 20 feet on horizontal surface around pool and vertical surface inside pool โ causes for stains on interior pool. Answer: copper, manganese, iron โ number of steps/ladder required for a pool. Answer: minimum of 2 in 2 separate places โ safety line. Answer: floating rope in water. if water gets deer than 5 feet, the rope must be positioned on the surface at 5 feet to clearly inform swimmers about change in depth
