Pool Operator's Final Exam

Pool Operator's Final Exam The percentage of hypoclorous acid formation is most influenced by: pH Pool painting is usually done: Before opening in the spring When a pool is chlorinated with gas chlorine, the operator must also use: Soda Ash The term "chlorine demand" refers to: The amount of chlorine which will react with substances in the pool Re-circulation pumps used in swimming pools are the type called: Centrifugal pumps Reversing the flow of water through the filters is called: Backwash "Slurry feed" or "body feed" refers to: Diatomite added during a filter run The term pH is determined by the concentration of: Hydrogen ions Because carbonate ions combine with hydrogen ions, sodium carbonate will cause pH to: Rise When enough chlorine is added to cause complete oxidation of all organic compounds, a sudden drop in residual chlorine may be noticed. The point at which this occurs is called the: Break-point "Residual chlorine" refers to: The amount left in the water after oxidation of organic material Which of the following is NOT considered a swimming pool disinfectant: Chlorinated hydrocarbons When chlorine is used as a disinfectant for swimming pools, the form in which it's disinfectant properties are the greatest is: Hypochlorous acid The chemical most commonly used to raise pH is: Sodium carbonate An example of a chemical used to stabilize chlorine is: Cyanuric acid The chemical reagent recommended by the health department to test chlorine residual in swimming pools is: D.P.D. The chemical reagent used most often to test pH in swimming pools is: Phenol red Considering all factors, which of the following would be the BEST range for pH in a swimming pool: 7.2-7.8 The minimum turnover rate to obtain 100% clarity in a pool is: Once in eight hours There is a noticeable odor of chlorine around your pool and bathers are complaining of eye irritation. Which of the following is most likely to solve the problem: Break point chlorination As pH increases, chlorine effectiveness: Decreases In a high-rate sand filter system, the tanks are backwashed: All at once The baffle in the filter tank is there to: Disperse water evenly over the surface of the filter media An access manhole is constructed on each tank in sand and anthracite filter systems: All of the above A hair and lint strainer should be located: Before the pump and before the filter Sodium hypochlorite used as a pool sanitizer also affects the water pH in the following manner: Raises Chlorine gas will ________ the pH: Lower DE systems should be turned off for a "rest": Never If the filter run is started with clean filters, the difference between the influent and effluent gauges should be: Very little Glass containers are: Never allowed in the pool enclosure Which of the following factors would produce a greater consumption of disinfectant in a pool: Bather load plus sunlight In a stabilized pool, the concentration of cyanuric acid should not exceed: 100 ppm Spa filtration and recirculation pumps should operate for: 24 hours continuously NSPF recommends that accident reports be kept for a period of: 3 Years Which of the following is NOT a basic part of a swimming pool filter system: Chlorinator Pool closure is the responsibility of: Both the pool operator/owner and the Health Department If chlorine gets on the skin or in the eyes: Flush with water for 15 minutes A certified pool operator certification card is valid for: 3 Years Which type of filter is exempt from Maryland discharge regulations: Cartridge Filter In the event of diarrhea or loose stool fecal contamination, a pool should be closed for a minimum of: 16 Hours A hotel pool would be an example of which type of pool classification: Semi-public It is best to super chlorinate a hot tub at the end of each day: False The system's turnover rate for a spa should be a minimum of once every three hours: False Hyperthermia causes hot tub bathers to become drowsy: True Maximum H2O temperature for a spa is 120 degrees: False Daily records should be maintained to verify maintenance, operation procedures, and readings: True The best time to vacuum a pool is early in the morning before bathers stir up dirt which has settled on the bottom: True All injuries and first aid treatments administered should be documented: True As a pool operator, you must ensure safe conditions and safety to your patrons at all times: True Accident prevention is a continuous program that is designed to provide a safe environment for pool patrons: True Filters are responsible for keeping the pool water "biologically clean": False Periodic super chlorination of a pool is a good preventative measure on avoiding algae problems: True The pool operator is responsible for warning patrons of all observable and hidden dangers in and around the pool area: True The measure of a solution's resistance to change in pH is referred to as total alkalinity: True Daily record keeping is mandated by most state codes and regulations: True It is suggested that wading pools have a turnover time of between 2 and 4 hours: False The pH range of 7.2 to 7.8 is acceptable and should be maintained at all times: False If air bubbles are noticed in the water you should first check all possible places for air leaks on the suction side of the pump: True Return Line: H Filter: C Main Drains: A Vacuum Gauge: G Flow Meter: F Skimmers: N