Pool Op Study Guide 2023 Questions Answered 100% correct

Pool Op Study Guide 2023 Questions Answered 100% correct The CDC estimates that approximately ________ water related injuries occur annually 140,000 No diving in water underneath ____ ft to prevent spinal injuries. Diving should only be done from ______ or ______. 6 feet; diving boards or stands What is the pool op responsible for maintaining during the day? The daily pool operation log What is the strongest point of suction in a pool? What could it cause? main drain; entrapment and drowning Built-in stairs are commonly used in the shallow end of pools and must have a _______ handrail secure How many ladders or stairways should be provided in a pool for adequate access and egress for swimmers? At least 2 ladders or stairways What is the physical process of removing suspended particles from the pool water? Filtration What happens to the the amount of water that can pass through the filter as dirt accumulates inside it? The amount of water that can go through it 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 What is the rate water passes through a high rate sand filter normally? 15-25 gallons per minute per square foot What is the volume of water going through a filter system measured in? gallons per minute What is the turnover rate for a swimming pool? Every 6 hours What is the equation for surface area of a rectangular or square pool? length x width = surface area What is the equation for surface area of a circular pool? 71 x r2 = surface area What is the equation for the volume of a swimming pool? length x width x depth x 7.48 = volume What is the amount of time it takes for the total volume of pool water to pass through the circulation system? turnover rate What is the equation for minimum required flow rate? (volume of pool/turnover rate)/60 = flow rate What primarily forms in a swimming pool because of poor pool water circulation? Algae What can penetrate into the plaster of the pool surface and cause damage and is the most difficult type of algae to control? Black algae What must be done in order to remove stains from the interior pool surface? The pool must be drained and acid washed What requires special handling and 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) What can be done with chlorine to remove a chlorine odor emanating from a pool? What is the odor usually caused by? shocking the pool with chlorine; chloramines What can be added to the water and will sanitize the water and prevent the growth of algae? chlorine What can be added to the pool water to raise the chlorine? Adding liquid or dry chlorine When should the pool operator close the pool to swimming? if he ever finds the water has become cloudy and he cannot see the main drain What not only kills germs, but will oxidize organic matter in pool water? Chlorine When performing ____________ to oxidize the combined chlorines, the level of free chlorine should be ________________ the level of combined chlorines in the pool water superchlorination; raised to ten times How many degrees Fahrenheit is the maximum safe temperature of spa pool water? 104 What removes sediments from the pool? Where is it located? main drain; deep end When may a sequestering agent be used in a pool? to prevent precipitation of minerals on pool surfaces What can lead to 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 in a pool? Filtration malfunction, excessive bather load and chemical imbalance of the pool water How do you know a filter backwash cycle for a sand filter is complete? when the backwash water appears clear in the sight glass What are some causes the hypochlorinator may not be working? If there is no chlorine in the vat, the injection fitting on the filter system is clogged or the tube assembly needs to be changed How many minutes do swimmers have to be out of the pool if there is no chlorine in the water and the pool operator has to hand-feed chlorine into the pool? 30 minutes What basic task does a pool operator need to perform? monitoring the chemical condition of the pool and making adjustments. What is a pool is a pool dependent on? What happens if there is any damage to the pump or need for repairs? The pump; The re-circulation system will shut down, also closing the pool A county health department inspector will perform ____________ inspections throughout the summer to ensure the facility is safe and the water chemistry proper. unannounced When should the pool operator record the chlorine and ph levels in a log? Every hour How many swimmers in the pool at a multi guard facility warrants a lifeguard in the stand? a single swimmer What does every filter system have? influent and effluent pressure gauges and a flow meter What are not acceptable methods in pools for cleaning? Ozone and UV water disinfection What does every pool have? free, combined and total chlorine What is the equation for combined chlorine? Total chlorine-Free chlorine=Combined chlorine What is the ideal bromine level in a pool? 1.5 to 6.0 What is the ideal bromine level in a spa? 3.0 to 10.0 What is the maximum level of chlorine in a Pool? 10 What is the maximum level of chlorine in a spa? 10 Pool water must be tested once every ______ hours 24 How tall must physical barriers around a pool (fence) be? 42 inches There must be a minimum of _________ of deck around the entire pool perimeter. 4 feet What could the possible cause be if you see bubbles coming up from a return? a bad seal on the hair/int strainer - it is not properly closed. What is the most common form of algae? green What do you do if a patron complains of a chlorine smell and their eyes are stinging? Raise the chlorine to Breakpoint Level. What should you do if the telephone at the pool doesn't work? close the pool What should you use when handling chemicals? Gloves, Goggles, Apron What should the Total Alkalinity of a pool be? between 80 AND 140 What does low alkalinity in a pool cause? LOSS OF PH CONTROL, OR PH BOUNCE What are metals that damage the surface of the pool? iron, manganese and copper. Cyanuric Acid level cannot exceed __________ 100 ppm Calcium Hardness of a pool should be between ____________ between 200 AND 400 What does low Calcium Hardness cause? What does high Calcium Hardness cause? CORROSION OF POOL EQUIPMENT; SCALING To raise _________ you should add _____________ TOTAL ALKALINITY; SODIUM BICARBONATE What is the equation for flow rate? Flow Rate=Turnover Rate /Filter Media Rate Add ____________, DO NOT add ______________ Chemicals to Water; Water to Chemicals How do you lower the Calcium Hardness Level? Drain water out and add fresh water. Dilute the water When you add chlorine to water it makes ______________ HYPOCHLOROUS ACID. Chlorine is added to the pool to __________________ OXIDIZE ORGANIC MATTER pH levels should be ___________ between 7.2 AND 7.8