Download Swimming Pool Operator Certification Q&A: Water Chemistry and Safety and more Exams Public Health in PDF only on Docsity!
Swimming Pool Operator Certification Q&A
First step of fecal accident procedure Correct Ans - Direct all bathers to leave the pool. All affected waters must be closed to swimming until proper procedures for contamination have been completed Second step of fecal accident procedure Correct Ans - Manually remove as much of the material as possible using a net or scoop and dispose of it in a sanitary manner. Clean and disinfect the scoop or net. After cleaning leave the net or scoop immersed in the pool during this infection. Vacuuming the stool is not allowed. Establish a fecal accident log documenting....? Correct Ans - (1) the date and time of the event (2) if the accident is a result of a form stools or diarrhea (3) The free available chlorine concentration at the time or observation of the event and before opening the public pool (4) The pH (5) The procedures followed to respond to the fecal accident including the process used to increase free chlorine residual if necessary (6) The contact time Procedures for form stool that is solid and not liquid Correct Ans - Raise the free available chlorine level to 2 ppm and ensure that the pH is between 7. and 7. Maintain the chlorine concentration for at least 25 minutes. Ensure this concentration is found throughout all waters by sampling at least three widely spaced locations away from return outlets Procedures for diarrhea liquid or non-form stools Correct Ans - Raise the free available chlorine level two 20 ppm and ensure that the pH is between 7. and 7. Maintain the chlorine concentration and pH for eight hours while ensuring that the filtration system is operating. Backwash the filter thoroughly discharging the effluent directly to waste. Where appropriate replace the filter media Bathers may be allowed into pool after chlorine concentration has been returned to normal operating ranges
Acid demand Correct Ans - The amount of acid required to reduce pH and alkalinity to the correct range Algae Correct Ans - Microscopic plant like organisms that grow in water do to warm temperatures and in adequate sanitizer. Algae can be green blue green black or yellow green (mustard). Alkalinity Correct Ans - A measure of the ability of pool water to resist changes in pH. Buffering capacity of water. Balanced water Correct Ans - The correct ratio of hardness, alkalinity, temperature, dissolved solids, and pH that prevent pool water from being either corrosive or scale forming Bromine Correct Ans - A chemical element that exists as a liquid in its elemental form or as part of a chemical compound that is an oxidant and a biocidal agent used to disinfect pool, spa and hot tub water. Bromamine Correct Ans - Bromine-ammonia compounds formed when the bromine in the water combines with ammonia, nitrogen or swimmer or bather waste. Unlike Chloramines they do not smell or irritate the body. They are active sanitizers. Calcium hardness Correct Ans - The amount of dissolved calcium in the pool. High levels promote scale and cloudy water. Low levels promote corrosion of the pool or spa equipment. Cavitation Correct Ans - Formation of partial vacuums when the pump exceeds the water supply Chlorine Correct Ans - A chemical element that exists as a gas in its elemental form or as a part of a chemical compound that is an oxidant and a biocidal agent used in pool, spa, and hot tub disinfection Chlorine demand Correct Ans - The amount of chlorine necessary to destroy the germs, algae, and other impurities in the water. Demand refers to the amount required before chlorine can be made available to continue sanitizing the pool, spa, or hot tub water.
Oxidation reduction potential Correct Ans - A method of measuring the potential, which often relates to the concentration of an oxidizer in the pool water. ORP probes send signals to electrical controllers that can control valves on chemical feeders to dissolve and release disinfectants. Pathogen Correct Ans - Micro organism that causes disease in humans. pH Correct Ans - Value expressing the relative acidity or alkalinity Of pool or spa water as indicated by hydrogen ion concentration. It is expressed as a number between zero and 14. Low pH values cause corrosion of equipment and pool or spa surfaces. High pH values cause scale and reduce the effectiveness of sanitizers. ppm Correct Ans - Parts per million Phenol red Correct Ans - A red chemical reagent that reacts with the hydrogen ion in pool or spa water to indicate the pH value Residual Correct Ans - The concentration of a chemical (typically the disinfectant) in water. Scale Correct Ans - The hard mineral deposits that forms on surfaces in contact with water when the calcium hardness, pH or total alkalinity levels are too high Shock Correct Ans - The practice of adding significant amounts of oxidizing chemical to water to destroy ammonia and nitrogen compounds and swimmer or bather contaminants Super chlorination Correct Ans - The practice of adding enough chlorinating compound to water to attain 5 to 10 ppm free available chlorine as measured with a DPD test kit Total chlorine Correct Ans - Total of all free available chlorine and combined chlorine in the water Total dissolved solids Correct Ans - The sum total of all dissolved material in the water
Ounces to pounds conversion Correct Ans - # oz / 16 = lbs Fluid ounces to gallons conversion Correct Ans - # fl oz / 128 = gal Yards to feet conversion Correct Ans - # yards * 3 = ft Meters to feet conversion Correct Ans - # meters * 3.28 = ft Surface area of a square or rectangle calculation Correct Ans - Length * width = sq ft Surface area of a round or circular pool calculation Correct Ans - Diameter / 2 = radius (3.14 or Pi)(radius * radius) = sq ft Surface area of a triangle calculation Correct Ans - (Length * width) / 2 = sq ft Bathing load or pool capacity calculation Correct Ans - Surface area / 25 or 10 Subtract 300 sq ft for each diving board Average depth calculation Correct Ans - Sum of the depths / # of depths Volume of a rectangle in # gallons Correct Ans - Length * with * average depth * 7. Volume of a circle in # gallons Correct Ans - Pi * radius * radius * average depth * 7. Volume of an oval in # gallons Correct Ans - Length * with * average depth * 6. Volume of a kidney in # gallons Correct Ans - Length * average width * average depth * 7. Turnover rate in # of hours Correct Ans - Volume (gal) / flow rate (GPM) / 60
Parameters of calcium hardness Correct Ans - Recommended between 200 ppm and 400 ppm Parameters of total dissolved solids Correct Ans - Less than 1500 ppm Turnover rates parameters Correct Ans - Pool - 6 hours Spa - 1/2 hour Wade - 1 hour Spray pad - 1/2 hour Old grandfathered rates Pool - 6 hours Spa - 1 hour Wade - 2 hour Pool capacity or bathing capacity per person Correct Ans - Pool - 25 sq ft Spa - 10 sq ft Wade - 25 sq ft Opening a seasonal pool Correct Ans - Be sure all components of your pool are functioning properly and water chemistry is correct Schedule a pre-opening inspection 3 to 5 days in advance Alb EDH 768-2600 or 311 Bernalillo county 314- State of an NM-Contact local Env. Dept. for invoice and make checks payable to Water Rec Facilities Fund Plans and specifications are required for any plan changes to existing approved facilities The certified operator on staff or by contract must be present Filters, chlorinators, brominators, etc.and VGB compliant drain covers must have...? Correct Ans - ANSI accreditation and have a national sanitation foundation (NSF), UL, or ETL seal of approval. Test for chlorine and bromine is by...? Correct Ans - DPD method When do you test pH and disinfectant? Correct Ans - Prior to opening and one more time during operational, Minimum How do you pools using unstabilized chlorine are to be tested...?
All other testing frequencies are...? Correct Ans - Hourly for chlorine and every four hours for other testing frequencies All pools using bro mine shall be tested...? Correct Ans - Every four hours. Disinfectants/sanitizers residuals required Correct Ans - Chlorine - 1 to 5 ppm for pools 2 to 5 ppm for spas and spray pads Bromine - 2 to 6 ppm for pools, spas and 4 to 6 ppm for spray pads Super chlorination is required when combined chlorine is...? Correct Ans - 0.5 ppm or more pH operating range?range? pH ideal range? Correct Ans - Operating range 7.2-7. Ideal range 7.4-7. Cyanuric acid maximum and minimum recommended ppm and how often should it be tested? Correct Ans - 100 ppm maximum 30 - 50 ppm minimum recommended Tested weekly Flow rate meter is...? Correct Ans - Required VGB compliant anti-entrapment drain grate and safety device (SVRS) is ...? Correct Ans - Required No cross connections between pool and water supply parameters Correct Ans
- (1) 6 inch air gap for over the rim fill sprouts. (2) anti-siphon device protected for other means of adding water to the pool Oh spas in wading pools are to be equipped did with...? Correct Ans - Oxidation - reduction potential(ORP) automatic disinfection and pH controllers Pools so equipted with ORP still need to be tested...? Correct Ans - Prior to daily opening and one additional time halfway through the period of operation Maximum ____ minute timer for spas located a minimum of ____ feet horizontally Correct Ans - 15 minutes
Amount of calcium hypochlorite needed to treat 10,000 gallons of water Correct Ans - 2 oz or 1/4 cup changes 10,000 gallons of water by 1 ppm Amount of sodium hypochloride -bleach needed to treat 10,000 gallons of water Correct Ans - 13 fl oz changes 10,000 gallons of water by 1 ppm Amount of Dichlor needed to treat 10,000 gallons of water Correct Ans - 2 1/2 fl oz changes 10,000 gallons of water by 1 ppm Amount of trichloride needed to treat 10,000 gallons of water Correct Ans - 1 1/2 oz changes 10,000 gallons of water by 1 ppm Amount of lithium hypochlorite needed to treat 10,000 gallons of water Correct Ans - 3.8 oz changes 10,000 gallons of water by 1 ppm Amount of sodium bicarbonate needed to treat 10,000 gallons of water and increase alkalinity Correct Ans - 1 1/2 lbs or 3 cups changes 10,000 gallons of water by 10 ppm Amount of sodium sesquicarbonate needed to treat 10,000 gallons of water and increase alkalinity Correct Ans - 1 1/4 lbs changes 10,000 gallons of water by 10 ppm Amount of muriatic acid needed to treat 10,000 gallons of water and decrease alkalinity Correct Ans - 21 fl oz or 1.3 pint changes 10,000 gallons of water by 10 ppm Amount of sodium bisulfate (dry acid) needed to treat 10,000 gallons of water and decrease alkalinity Correct Ans - 1 1/2 lbs or 1 2/3 cup changes 10, gallons of water by 10 ppm Amounts of calcium chloride 77% needed to treat 10,000 gallons of water and increase calcium hardness Correct Ans - 1 1/4 lb changes 10,000 gallons of water by 10 ppm Amount of calcium chloride 100% needed to treat 10,000 gallons of water and increase calcium hardness Correct Ans - 1 lb changes 10,000 gallons of water by 10 ppm
Amount of sodium thiosulfate needed to treat 10,000 gallons of water and neutralize chlorine Correct Ans - 10 oz changes 10,000 gallons of water by 10 ppm Amount of cyanuric acid needed to treat 10,000 gallons of water and increased stabilizer Correct Ans - 6 1/2 oz or < cup changes 10,000 gallons of water by 5 ppm Amount of potassium monopersulfate needed to oxidize 10,000 gallons of water Correct Ans - 1 lb Increase of pH using soda ash Correct Ans - 6.6 - 7.4 is 12 oz 6.8 - 7.4 is 10 oz 7.0 - 7.4 is 8 oz 7.2 - 7.4 is 6 oz Decrease of pH using muriatic acid Correct Ans - 8.0 - 7.6 is 16 oz 7.8 - 7.6 is 12 oz
