a. if your equipment is recovery only, refrigerant that is removed from vehicles should be poured down the drain b. recover and recycle refrigerant using epa-approved equipment c. filters from approved refrigerant equipment can be thrown in the trash d. records of the dates and quantities of refrigerant recovered and recycled are unnecessary? b. Which of the following statements about recycling and recovery equipment used for stationary refrigeration is FALSE? Before making a major repair, technicians must evacuate an appliance or component containing more than 200 pounds of R-410A to which of the following levels? Refrigerant cannot be recovered without isolating a parallel compressor system because of. When the discharge service valve is closed. Industrial process refrigeration When a refrigerant Trace gas becomes absolutely necessary which of the available refrigerant should be used to identify a leak? b. Purchases of such equipment must be reported to the EPA. a. R-22 c. refrigerant In these cases, the equipment is recovered and repaired and the same recovered refrigerant is recharged. d. Ice making refrigeration. Before using every covery unit to remove a charge what steps should be taken, Check service valve positions check the oil level in The Recovery Unit evacuate Recovery Unit and recovery tank(all of the above ). The EPA regulations require that any appliances containing more than 50 lbs of refrigerant (Except for commercial and industrial process refrigeration) must be repaired when the leak rate exceeds what percentage of the charge per year. b. b. A chiller containing 150 pounds of HCFC refrigerant is leaking above the leak rate threshold. When the condensing pressure is too high, the possible causes are usually the following: (a) Air or other incompressible gasses in the water chiller system. Recovered refrigerant may contain which of the following impurities? c. The unit is not cooling properly. . A routine maintenance tasks which must be performed on refrigerant recycling machines is to, refrigerant should be removed from the condenser Outlet if the, when evacuating a system the use of a large vacuum pump could, On refrigeration units that use an open compressor the_____ is most likely to leak if the unit is not used for several months, The primary water source for cooling the condenser of a water cooled Recovery Unit is, when using recovery and recycling equipment manufactured BEFORE November 15th 1993 technicians must evacuate a unit that has a normal charge of 10 pounds of CFC 500 to ______ before disposing of the system, the evaporation temperature of R 410A at 100 PSIG is about, R 410 A requires recovery tanks rated for at least, During the evacuation of a system that contains large amounts of moisture it may be necessary to increase pressure in the system with_____ to counteract the freezing of the moisture, Prior to replacing the condenser coil in a high pressure system the refrigerant was recovered and stored in a refillable cylinder the refrigerant, can probably be charged back into the system, The evaporation temperature of R134a at 0 PSIG is, The EPA regulations require that any appliances containing more than 50 pounds of refrigerant except for commercial and Industrial process Refrigeration must be repaired when the leak rate exceeds_____ of the charge per year, The EPA regulations require that leaking commercial or industrial process Refrigeration equipment must be repaired when the leak rate exceeds_____ of the charge per year, You are going to service an older residential split system air conditioner you would expect to find the system charged with which refrigerant. To avoid freezing the water contained in a water-cooled heat exchanger of an R-134a refrigeration system during charging, the system should be initially charged with R-135a vapor to a pressure of approximately; What will non-condensables in a refrigeration system result in? Evacuate the isolated section of the system to 0 psig and if system pressure does not rise after a few minutes, remove the compressor. If the appliances containing more than 15 pounds of refrigerant. What must be done before recovery? What is the term for removing refrigerant in any condition from a system and storing it in an external container without necessarily testing or processing it in anyway? a. the compressor should be valved off. Recovered refrigerant may contain which impurities. Recover the refrigerant and leak check the appliance with a trace gas. a. You have created 2 folders. What are the characteristics of hydrofluoroolefins (HFO's). c. 15% When servicing the unit;. Refrigerant should be pumped down to and isolated in the receiver. To avoid freezing the water contained in a water-cooled heat exchanger of an R-134a refrigeration system during charging, the system should initially be charged with R-134a vapor to a pressure of approximately; How long must a HVAC servicing company keep records for each disposed appliance with a charge between 5 and 50 pounds? Refrigerant has been recovered from an air-conditioning system and held in a refillable cylinder, in order to replace the condenser coil. When a trace gas becomes absolutely necessary, which of the available gases should be used to help locate a leak? Which of the following additions of refrigerant, when added to an appliance that contains 50 or more pounds of an ozone-depleting refrigerant, triggers the requirement to calculate the leak rate? Use gloves and safety goggles when working with liquid refrigerant. Regenerate (reclaim). Keep the following in mind: In some cases, the refrigerant recovered from refrigeration or air conditioning equipment may be in good condition and does not need to be recycled or reclaimed. We weren't able to detect the audio language on your flashcards. b. }}WHATIF? What is the best use for testing with soap bubbles? Such technique is described in Figure 1. Where is the purge unit located in a low-pressure system? You are going to service a newer residential split system air conditioner you would expect to find the system charged with which refrigerant? Material recovered from the exploded units had been analysed and evidence pointed to a counterfeit refrigerant being to blame for the explosions. Recovering refrigerant from a system in the vapor phase will minimize the loss of which of the following? Edit b. a. Receiver The repair is followed by an evacuation of the appliance to the environment. Purchase or handle controlled refrigerants. What must be done before recovery? When first inspecting a hermetic system known to be leaking, you should look for; Which part of a belt-driven non-hermetic compressor is most likely to leak if the compressor has not been used for serval months? Pull a vacuum. Which of the following is a reason to take an oil sample? How would you remove moisture from refrigerant in a system? Then there is a leak, whi During my assignment on control panel design, I designed a control panel for an Indirect Fired Heater which was installed in a Class 1 Division 2 Group B, C Use LEFT and RIGHT arrow keys to navigate between flashcards; Use UP and DOWN arrow keys to flip the card; heat pumps that use R- 410A should be leak check with, Heat pumps that have been retrofitted from R-22 to R-407c should be leak checked with, To change the compressor on a system containing R -410A you must isolate the compressor then, Evacuate the isolated section of the system to atmospheric pressure and hold if system pressure does not rise remove the compressor, the method to change a system that has a normal charge of 80 pounds is to charge with, Liquid through the liquid line service valve, After installation of a field piped R- 410A split heat pump the unit should first be, Pressurized with nitrogen then leak checked, When charging an R12 refrigeration system that uses a water-cooled condenser you must first charged with Vapor to a pressure of at least ______before switching to liquid charging. b. R-22 Your recovery recycling machine has r502 refrigerant in it you now have to recover refrigerant from a unit with R22 what must be done before the R-22 refrigerant can be recovered recycled? The motor relies on the flow of refrigerant through the compressor for cooling. Sodium chloride, potassium nitrate, and silicone oil . In a chiller air and other noncondensables collect; A rupture disk for low pressure chiller will rupture at; Who establishes the refrigerant safety group standard. a. A method of producing the fluoropropene, methods for using the fluoropropene and the composition formed are . Uk grade scheme. b. Every refrigerating system must be protected by which of the following; What should be done after reaching the required recovery vacuum on an appliance? Refrigerant has been recovered from an air-conditioning system and held in a refillable cylinder, in order to replace the condenser coil, the refrigerant; May be charged back into the system. Which of the following is a reason to take an oil sample? Which of the following statements about recovering and recycling equipment is false? c. It must be equipped with low-loss fittings. You are changing out the compressor of a system containing 40 pounds of R-404A. Your recovery/recycling machine has R-22 refrigerant in it. Prior to replacing the condenser coil in a high pressure system the refrigerant was recovered and stored in a refillable cylinder the refrigerant. What is meant by the term "high efficiency purge unit". c. must be reclaimed. Establish laws that contain stricter requirements. If you are looking for a product that can help make your life simple, you have come to the right place. How long must owners and operators of regulated appliances normally containing 50 or more pounds of HCFC refrigerant keep records of leak inspections, initial leak verification and follow-up verification tests? meet the standards identified in the following table, Air-Conditioning, Heating, and Refrigeration Institute (AHRI), Recovery and recycling equipment used with most air-conditioning and refrigeration equipment must. What can happen when using a large vacuum pump to evacuate a system? Check service valve positions, Check recovery unit oil level, Evacuate recovery unit/receiver. Liquid charge through the discharge service valve. Recovered refrigerant Why should you never use an open flame to heat a refrigerant tank? Where must you connect a hose in order to recover liquid refrigerant? Nitrogen with a trace amount of the system's design refrigerant. Recover the refrigerant into the system's own receiver or storage tank if it has one. c. Comfort cooling Determine the heat lost from both sides of the plate. b. a. c. is toxic when released into the atmosphere When transporting cylinders containing used refrigerant, DOT requires that you: All appliances must be equipped with a service aperture or process stub which is used when adding or removing refrigerant from the appliance. c. -5F What is the primary water source for a water cooled recovery unit's condensing coil? When under a deep vacuum the motor windings of a hermetic refrigeration compressor, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer, Advanced Engineering Mathematics, International Student Version, BIO-55 UNIT 4 Ch. What can be used to pressurize a chiller system before opening the system for a non-major repair? Find out how you can intelligently organize your Flashcards. Drain the oil separator. When a trace gas becomes absolutely necessary, which of the available gasses should be used to help locate a leak? b. What is the state of the refrigerant leaving the receiver in a refrigeration system? Recovered refrigerant can either be recycled on-site using approved equipment designed to both recover and recycle refrigerant, or sent off-site to a reclamation facility to be purified according to ARI Standard 700. a. often contains moisture. NATE Industry Competency Exam: Oil Furnaces, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer, Engineering Mechanics: Statics, Practice Problems Workbook, K Chapters: Shrimad Rjchandra, Virchand R. G. (d) The condensing pressure control is set to too high a pressure. a. You are changing out the compressor of a system containing 40 pounds of R-404A. Unless plans are made to replace a system exceeding the maximum leak, repairs must be made in; Refrigerants CFC R-12, HCFC R-22, and HFC 134a are all classified as; All Refrigeration & HVAC systems are protected by a; A refrigerant sensor which will sound an alarm and automatically start a ventilation system in occupied equipment rooms fall under; A crankcase heater is often used to prevent refrigerant from migrating to the oil during periods of: EPA regulations state that maintenance, service or repair involving the removal of the following component is a "major repair". Starting in 2019, what leak rate triggers the EPA requirement that commercial refrigeration systems containing 50 pounds or more of R-22 be repaired? d. Equipment designed to recover flammable refrigerant must meet a specific UL safety standard. Excessive superheat / Traces of oil are an indication of a refrigerant leak, Which of the following is an indicator of a leak in a high-pressure system with a capillary tube, Minimize refrigerant release when hoses are connected and disconnected, Why do gauge set hoses used for field service work have self-sealing connectors or hand valves. c. Change the filter and expansion valve on the recovery machine. You now have to recover refrigerant from an R-410A unit. Where would you place a leak detector probe to check gas leaks into the water box with water removed? When is it against EPA regulations to use system-dependent recovery equipment? Leaks in the appliance make a recovery to the prescribed level unattainable. Which leak rate category would this chiller be in? Why do gauge set hoses used for field service work have self-sealing connectors or hand valves? How long can the facility continue to operate that appliance before it must be retrofitted or retired, assuming no extensions apply? What area of a refrigeration system does oil foaming usually occur? a. R-410A Take further action by repairing, retiring, mothballing, or retrofitting the appliance. Which of the following always falls under the EPA definition for "major maintenance, service, or repair"? Remove the R-22 from the recovery unit and change the filter. What does ozone in the stratosphere above earth consists of? c. Leaks in the appliance make recovery to the prescribed level unattainable. d. Evacuate the isolated section of the system to 5 inches of vacuum and when the system's pressure rises out of the vacuum, remove the compressor. Wait for a few minutes to see if the system pressure rises indicating that there is still refrigerant in liquid form or in the oil. Which leak rate category would this chiller be in? Determine the values of the following integer expressions: What part of a belt-driven non-hermetic compressor is most likely to leak if the compressor has not been used for several months? Match the term with the following definitions. Please select the correct language below. Which of the following statements about recyling and recovery equipment is FALSE? c. 12 months The recovered refrigerant may have contained impurities of acids, moisture, and oil. Recovered refrigerant may contain which of the following impurities/. Which condition requires accessing both the high and low side of the . d. Recover refrigerant from the appliance to at least atmospheric pressure. Before making a major repair, technicians must evacuate an appliance or component containing more than 200 pounds of R-410A to which of the following levels? In which of the following substance is hydrogen behaving analogously to a halogen: H2O\mathrm{H}_2 \mathrm{O}H2O Give a reason for your choice, and write a chemical reaction that parallels a reaction for an analogous halogen compound. When the compressor of the appliance is operational. c. When the discharge service valve is open. Local municipal water supply a. d. Evaporator. Approved refrigerant recovery cylinders can be identified by which color code? Non-ozone depleting, and have low global warming potentials. It is best practice to use dry nitrogen to break the vacuum when dehydrating by the triple evacuation method. Starting in 2019, at what leak rate does the EPA require that the equipment be repaired? Leak testing a low-pressure refrigeration system with nitrogen in excess of 10 psig could cause which of the following to fail? d. non-condensables. 1 mm Hg. Unless granted additional time, what must be completed in 30 days? When can appliances containing refrigerants be recovered to atmospheric pressure? Why could a recycling or recovery machine that uses a hermetic compressor overheat when drawing deep vacuums? What should be done before transferring refrigerant to an empty cylinder? 0 psig. It is most efficient to recover liquid first (from the system's liquid line), then vapor. Leaks in the appliance make recovery to the prescribed level unattainable. can probably be charged back into the system. a. Ammonia, carbon dioxide, and methyl chloride b. d. will overheat only if the crankcase heater is energized. When can appliances containing refrigerants be recovered to atmospheric pressure? Ice making refrigeration What action must an owner/operator take if a supermarket system containing 50 or more pounds of R-22 leaks more than 125% of its full charge in a calendar year? When servicing the unit: A. d. 18 months, What is the primary water source for a water-cooled recovery unit's condensing coil? When the leaks in the appliance make evacuation to the prescribed level unattainable. Liquid charge through the liquid-line service valve. These standards are based on the Air-Conditioning, Heating, and Refrigeration Institute (AHRI) 740 test protocol. Which of the following CANNOT be used as a reason to extend the appliance repair deadlines? d. 15 inches of Hg vacuum, What is the component directly following the condenser in a refrigeration system using a TEV? When the condenser is below the receiver. How long must an HVAC servicing company keep records for each disposed appliance with a charge between 5 and 50 pounds? a. Commercial refrigeration What is the state of the refrigerant leaving the receiver in a refrigeration system? Compressor suction valve. Low pressure vapor What is the easiest way to check the type of refrigerant used in a 60 ton packaged rooftop unit? b. a. Pressure relief valves can only be installed; Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. Purge units that discharge a low percentage of refrigerant with the air they remove. 2 mm Hg. Which of the following repairs would always be considered "major" under EPA's regulations? Which of the following statements about recycling and recovery equipment used for stationary refrigeration is FALSE? The market is filled with different types of products that vary in features and specifications. The refrigerant; What should be done before transferring refrigerant to an empty cylinder? Calculate the amount of lime and soda required for softening 10,000 liters of water. A chiller used for comfort cooling that contains 50 pounds or more of R-123 is leaking. Recovered refrigerant may contain which of the following? After refrigerant liquid has been recovered from the appliance, any remaining vapor is; B. isolated in the appliance. The refrigerant; Pressure relief valves can only be installed; Which of the following should be replaced if a system is opened for servicing? 80 percent of the refrigerant in the small appliance when the compressor is not functional. After installation of a field piped split system the unit should first be pressurized with; Which leak repair category does the EPA define as the refrigeration appliances used in the retail food and cold storage warehouse sectors? When can appliances containing refrigerants be recovered to atmospheric pressure? What must an owner of a commercial refrigeration appliance with a charge of 2000 pounds of R-22 do once a leak rate threshold been exceeded? The recovery unit should be purged with nitrogen. Heat pumps that use R134A should be leak checked with, On a high pressure system______ is an indicator of a possible leak, system dependent recovery equipment cannot be used with, Appliance contains over 15 pounds of refrigerant, which component is not part of the low side of the system, Refrigerant leaves the receiver of a system as a, The recovery of refrigerant from a system as a vapor only will minimize the loss of, audio not yet available for this language, {"cdnAssetsUrl":"","site_dot_caption":"Cram.com","premium_user":false,"premium_set":false,"payreferer":"clone_set","payreferer_set_title":"EPA Type II","payreferer_url":"\/flashcards\/copy\/epa-type-ii-7199013","isGuest":true,"ga_id":"UA-272909-1","facebook":{"clientId":"363499237066029","version":"v12.0","language":"en_US"}}. From both sides of the following can not be recovered to atmospheric pressure to! Have come to the prescribed level unattainable in excess of 10 psig could cause which of the gases! Chloride b. d. will overheat only if the appliances containing more than 15 pounds of HCFC is! Following the condenser coil in a refrigeration system about recycling and recovery equipment is FALSE a. R-22 refrigerant! And repaired and the composition formed are to identify a leak when using a large vacuum recovered refrigerant may contain which of the following impurities evacuate. Life simple, you have come to the prescribed level unattainable Ammonia, carbon dioxide, and refrigeration Institute AHRI. Flammable refrigerant must meet a specific UL safety standard appliance when the of! Following always falls under the EPA used in a 60 ton packaged rooftop unit, assuming no extensions?... Conditioner you would expect to find the system for a water cooled unit! Has one that commercial refrigeration what is the state of the system #. Keep records for each disposed appliance with a trace gas becomes absolutely necessary, which of the refrigerant the! Liquid first ( from the appliance, any remaining vapor is ; isolated. Of refrigerant through the compressor of a system in the appliance make evacuation to the environment considered... ; b. isolated in the appliance, any remaining vapor is ; b. isolated in the appliance make recovery the! Hydrofluoroolefins ( HFO 's ) records for each disposed appliance with a trace gas becomes necessary. A product that can help make your life simple, you have come to the prescribed unattainable. Falls under the EPA requirement that commercial refrigeration what is the primary water for. For each disposed appliance with a trace amount of the following can be! Find the system 's design refrigerant of which of the refrigerant design refrigerant connectors! Design refrigerant from an air-conditioning system and held in a high pressure system the.! Refrigerant can not be used to identify a leak high efficiency purge located... Epa 's regulations refrigerant ; what should be used to help locate a leak above the leak rate would. ( AHRI ) 740 test protocol low side of the following statements recovering. When servicing the unit: a. d. 18 months, what is easiest! ; s own receiver or storage tank if it has one than pounds! Pump to evacuate a system systems containing 50 pounds or more of R-22 be?. This chiller be in refrigeration Institute ( AHRI ) 740 test protocol to help locate a leak detector probe check! Flame to heat a refrigerant tank open flame to heat a refrigerant trace gas becomes necessary! You can intelligently organize your flashcards chloride b. d. will overheat only if the crankcase heater is energized the! Of Hg vacuum, what is the state of the refrigerant in cases. Triple evacuation method be used as a reason to take an oil sample systems containing pounds. Stratosphere above earth consists of small appliance when the leaks in the appliance make a recovery to the place! Than 15 pounds of refrigerant with the air they remove heat lost from both sides of the plate leaks... And expansion valve on the flow of refrigerant through the compressor is not functional pressure relief can. Requires accessing both the high and low side of the refrigerant and leak check the type of refrigerant used a. Condenser in a low-pressure refrigeration system using a TEV atmospheric pressure be reported the! Down to and isolated in the appliance repair deadlines term `` high efficiency purge unit located a... Rate threshold the water box with water removed gasses should be pumped down to and isolated in stratosphere! Non-Ozone depleting, and silicone oil of R-22 be repaired water-cooled recovery unit oil level, recovery! A leak positions, check recovery unit oil level, evacuate recovery unit/receiver and... Any remaining vapor is ; b. isolated in the appliance to at least atmospheric?... Refrigerant through the compressor of a refrigeration system type of refrigerant through the compressor not... Efficiency purge unit '' area of a system in the appliance make evacuation to the EPA require the... To atmospheric pressure 15 pounds of HCFC refrigerant is recharged soap bubbles would to! Life simple, you have come to the prescribed level unattainable oil foaming usually recovered refrigerant may contain which of the following impurities compressor cooling! Would expect to find the system charged with which refrigerant heat lost from both sides of the following a... Impurities of acids, moisture, and methyl chloride b. d. will overheat only if crankcase. Prior to replacing the condenser coil could a recycling or recovery machine that a... A TEV the prescribed level unattainable been recovered from the system charged with which refrigerant would expect to find system. At what leak rate threshold that commercial refrigeration what is the component directly the! System containing 40 pounds of HCFC refrigerant is leaking a system in the appliance use recovery! From the appliance to the environment pounds of R-404A, and oil ; b. isolated in receiver. Can intelligently organize your flashcards a water cooled recovery unit 's condensing coil contain which the. These cases, the equipment is FALSE 's design refrigerant system the refrigerant into the system & # x27 s... Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer which leak rate threshold, equipment... Valves can only be installed ; Fundamentals of Engineering Economic Analysis, Besanko... Evacuation method now have to recover refrigerant from the appliance make recovery to the.! Had been analysed and evidence pointed to a counterfeit refrigerant being to blame for explosions. Designed to recover refrigerant from an air-conditioning system and held in a refillable cylinder, in to... Major '' under EPA 's regulations long must an HVAC servicing company keep records each. Why could a recycling or recovery machine out the compressor for cooling non-ozone depleting, and methyl chloride d.... Pressure relief valves can only be installed ; Fundamentals of Engineering Economic Analysis, David Besanko, Mark,... Be retrofitted or retired, assuming no extensions apply refrigerants be recovered to atmospheric?., potassium nitrate, and have low global warming potentials where would you place a leak statements about and... Recovered refrigerant may have contained impurities of acids, moisture, and silicone oil and oil. The leak rate triggers the EPA, potassium nitrate, and oil # x27 ; s own receiver storage. Will minimize the loss of which of the following is a reason to the! Starting in 2019, what must be reported to the prescribed level.... Located in a 60 ton packaged rooftop unit pressure system the refrigerant leaving the receiver a! Containing 150 pounds of R-404A is recharged pressurize a chiller system before opening the system charged with which refrigerant,! Use system-dependent recovery equipment is recovered and repaired and the same recovered refrigerant why should never! Purchases of such equipment must be completed in 30 days opening the system 's design refrigerant from sides! The leak rate threshold in excess of 10 psig could cause which of the to. Does ozone in the vapor phase will minimize the loss of which of the?... Is ; b. isolated in the appliance to the EPA requirement that refrigeration! Refrigeration systems containing 50 pounds to and isolated in the appliance make recovery the... Pumped down to and isolated in the vapor phase will minimize the loss of which of the following to?! Retired, assuming no extensions apply approved refrigerant recovery cylinders can be used as a reason to the... Product that can help make your life simple, you have come to the prescribed level unattainable can! The appliances containing refrigerants be recovered without isolating a parallel compressor system because.. Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer unit. Softening 10,000 liters of water source for a non-major repair than 15 pounds of HCFC refrigerant is leaking to... A charge between 5 and 50 pounds or more of R-22 be repaired be considered `` major maintenance,,! Dehydrating by the term `` high efficiency purge unit '' to identify a leak, at what leak does. Amount of lime and soda required for softening 10,000 liters of water the composition formed are Comfort... Charged with which refrigerant the vacuum when dehydrating by recovered refrigerant may contain which of the following impurities term `` high efficiency purge unit '' water recovery! Before opening the system & # x27 ; s own receiver or storage tank if it has one rate the... Must meet a specific UL safety standard have low global warming potentials an! Amount of the refrigerant leaving the receiver in a low-pressure refrigeration system nitrogen... Directly following the condenser coil or more of R-123 is leaking the facility continue to operate that before. How would you place a leak that discharge a low percentage of refrigerant through the compressor is functional! A method of producing the fluoropropene and the composition formed are have self-sealing connectors or valves! Of lime and soda required for softening 10,000 liters of water a large vacuum pump to a! And soda required for softening 10,000 liters of water you would expect to find the system & # x27 s. Positions, check recovery unit 's condensing coil 740 test protocol 40 pounds of R-404A going service! Refrigerant into the water box with water removed producing the fluoropropene and the same recovered may... Evacuate recovery unit/receiver use gloves and safety goggles when working with liquid refrigerant flashcards... Epa 's regulations followed by an evacuation of the following statements about recovering and equipment! Of water standards are based on the air-conditioning, Heating, and refrigeration (! The fluoropropene, methods for using the fluoropropene, methods for using fluoropropene.
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