The market is filled with different types of products that vary in features and specifications. d. R-407A, Which of the following should be replaced if a system is opened for servicing? Shut down the appliance temporarily. What should be done before transferring refrigerant to an empty cylinder? What can happen when using a large vacuum pump to evacuate a system? d. Measure the condenser pressure, What should be used to remove ice from sight glasses or viewing glasses? The most common way to detect the leak is to look under the car, and if there is the presence of puddle or liquid beneath the car. What will back seating a suction shutoff valve close? 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. Leak testing a low-pressure refrigeration system with nitrogen in excess of 10 psig could cause which of the following to fail? b. 0 psig Which of the following is an HFC refrigerant. How can you speed up the removal of the refrigerant charge from a system? 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? 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? After refrigerant liquid has been recovered from the appliance, any remaining vapor is; 158 psig Recovering refrigerant from a system in the vapor phase will minimize the loss of which of the following? Trapped oil can freeze. c. refrigerant What should be done before transferring refrigerant to an empty cylinder? What area of a refrigeration system does oil foaming usually occur? Every month Which leak repair category does the EPA define as air conditioning appliances used to provide cooling in order to control heat and/ or humidity in occupied facilities including, but not limited to, residential, office, and commercial buildings? R410a require Certified Recovery and recycling machines rated for at least, Reduce the amount of refrigerant in the lubricating oil. d. Use of the calculations based on the BTU capacity of the system. Where would you place a leak detector probe to check gas leaks into the water box with water removed? d. To prevent vapor lock during liquid transfer to recovery cylinders. a. d. When topping off the system. Which of the following is NOT required to mothball an appliance (thereby extending the leak repair deadline)? c. 10 inches of Hg vacuum 3 years When is it against EPA regulations to use system-dependent recovery equipment? Repair the appliance so that it leaks below the threshold and conduct the initial verification test. A lock (LockA locked padlock) or https:// means youve safely connected to the .gov website. a. The METHOD FOR PURIFYING 1,2-DIFLUOROETHYLENE (HFO-1132) patent was assigned a Application Number # 17360678 - by the United States Patent and Trademark Office (USPTO). Determining the type of refrigerant. c. an open equalization connection. 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? d. Ice making refrigeration. Your recovery/recycling machine has R-22 refrigerant in it. 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. a. EPA regulations (40 CFR Part 82, Subpart F) under Section 608 of the Clean Air Act require that refrigerant recovery and recycling equipment be tested to ensure it meets EPA requirements.For most recovery and recycling equipment, these requirements are detailed in Appendix B2 to 40 CFR 82, Subpart F. Requirements for equipment manufactured or imported after January 1, 2017, are detailed in . When leaks in the appliance make evacuation to the prescribed level unattainable. Material recovered from the exploded units had been analysed and evidence pointed to a counterfeit refrigerant being to blame for the explosions. When the discharge service valve is closed. b. R-123 Why do gauge set hoses used for field service work have self-sealing connectors or hand valves? d. 20%. Recovering refrigerant from a system in the vapor phase will minimize the loss of which of the following? What steps should be taken before using a recovery unit to remove a charge? c. Break the vacuum with nitrogen and open the system for service. b. - ANSWER Acids, Moisture, and Oil What area . d. Replacement of a condenser fan motor. After a leak repair of a supermarket rack using 3000 lbs. Syngas produced from gasification needs to go through an essential gas cleanup step for the removal of tars and particulates for further processing, which is one of the cost-inducing steps. A. Where must you connect a hose in order to recover liquid refrigerant? Which of the following statements is true of recycling and recovery equipment? a. R-22 Which of the following is NOT required in order to mothball an appliance using an ozone-depleting refrigerant (thereby extending the leak repair deadline)? Commercial Refrigeration Whole Home Evaporative Cooling This refrigerant needs to be monitored and refilled periodically in order for the unit to work. A basketball of circumference 75.5cm75.5 \mathrm{~cm}75.5cm and mass 598g598 \mathrm{~g}598g is forced to the bottom of a swimming pool and then released. Both organizations can provide information on certified equipment. c. Leaks in the appliance make recovery to the prescribed level unattainable. Leaks in the appliance make a recovery to the prescribed level unattainable. It is best practice to use dry nitrogen to break the vacuum when dehydrating by the triple evacuation method. When the condenser is on the roof. The refrigerant; What should be done before transferring refrigerant to an empty cylinder. c. When the appliance contains over 15 pounds of refrigerant. Which of the following statements about recycling and recovery equipment used for stationary refrigeration is FALSE? a. Receiver Drain the oil separator. Local municipal water supply c. To minimize refrigerant release when hoses are connected and disconnected. When a trace gas becomes absolutely necessary, which of the available gasses should be used to help locate a leak? b. Industrial heat pumps: state-of-the-art. 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-134a vapor to a pressure of approximately; What will non-condensables in a refrigeration system result in? How can you speed up the removal of the refrigerant charge from system? b. When servicing the unit; refrigerant should be pumped down to and isolated in the receiver. The gauge hoses used to connect the recovery unit to . Which refrigerant(s) must be recovered before opening or disposing of appliances? What is the best use for testing with soap bubbles? To determine if the system is leaking more than the allowable rate, the EPA allows the use of which one of the following methods to determine the full charge? The recovered refrigerant may have contained impurities of acids, moisture, and oil. What must be done before recovery? d. 24 months. d. A refrigerant receiver. c. Commercial refrigeration a. After refrigerant liquid has been removed from a system any remaining vapor is, In a refrigeration system with a TXV or other type of throttling device the component directly following the condenser is the. d. High pressure vapor. WHATIF?\text{\blue{WHAT IF? Existing hot gas . When recovery is first started, at what phase is the refrigerant removed to save recovery time? Which leak repair category does the EPA define as air-conditioning appliances used to provide cooling in order to control heat and/or humidity in occupied facilities including, but not limited to, residential, office, and commercial buildings? answer choices Ammonia, carbon dioxide, and methyl chloride Sodium chloride, potassium nitrate, and silicone oil Sulphur dioxide and methane Acids, moisture, and oil Question 14 30 seconds Q. Propane cylinders for grilling contain impurities that can damage refrigeration d. non-condensables. What is the primary water source for a water cooled recovery unit's condensing coil? c. 1000 microns d. 90 psig. - ANSWER 3 years (Both answers) Recovered refrigerant may contain which of the following impurities? Purchase or handle controlled refrigerants. Purge units that discharge a low percentage of refrigerant with the air they remove. b. Psia b. Isopropyl alcohol a. Why could a recycling or recovery machine that uses a hermetic compressor overheat when drawing deep vacuums? When should refrigerant be removed from the condenser outlet? Use your service gauge set and a PT chart. Unless granted additional time, how many days do you have to repair the leak and conduct the initial leak verification? Add to folder Recovered refrigerant may contain which of the following impurities? When dehydrating a system it should be evacuated to a level of; Refrigerant should be removed from the condenser outlet if the condenser is; What happens to a refrigerant that is above the saturation temperature? Find out how you can intelligently organize your Flashcards. a. Recovered refrigerant may contain which of the following impurities? a. Remove the R-22 from the recovery unit and change the filter. d. To prevent acid pitting. 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. Remove the appliance and store it in a warehouse at the facility. Refrigerant has been recovered from an air-conditioning system and held in a refillable cylinder, in order to replace the condenser coil, the refrigerant; What steps should be taken before using a recovery unit to remove a charge? The release of regulated refrigerants generally occurs as refrigeration and air-conditioning equipment is salvaged or dismantled for disposal. It is best practice to use dry nitrogen to break the vacuum when dehydrating by the triple evacuation method. a. Recovered refrigerant may contain which of the following impurities/ Acids, moisture, and oil. a. could be damaged if energized. Pressurize with an inert gas and leak check. After system servicing and recharging, why is refrigerant vapor re-introduced to the chiller before refrigerant liquid? During the installation of a new appliance. Using a smaller recovery vessel. How often should children over age five be screened for visual acuity? When recovery is first started, at what phase is the refrigerant removed to save recovery time? How often is the customer required to perform a leak inspection? a. Purge the condenser. purchasers of refrigerant be accredited and that ozone depleting refrigerants not be knowingly emitted, with this latter requirement including the recovery of refrigerants from existing systems. What can happen when using a large vacuum pump to evacuate a system? What is the best use for testing with soap bubbles? A fluoropropene composition comprising Z-1,3,3,3-tetrafluoropropene, E-1,3,3,3-tetrafluoropropene, 1,1,3,3,3-pentafluoropropene, 2,3,3,3-tetrafluoropropene, and optionally 1,1,1,3,3-pentafluoropropane wherein the 2,3,3,3-tetrafluoropropene being present in an amount of 0.00001 to 1.0%. 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. Gas leaks into the water box with water removed of Hg vacuum 3 years when it! Local municipal water supply c. to minimize refrigerant release when hoses are connected and disconnected recover... Initial verification test area of a refrigeration system does oil foaming usually occur with different types of products vary. 0 psig which of the following statements is true of recycling and recovery equipment used for service! The customer required to mothball an appliance ( thereby extending the leak and the... Refrigeration Whole Home Evaporative Cooling This refrigerant needs to be monitored and refilled periodically order. The following should be used to remove a charge condensing coil the gauge hoses used field. Contained impurities of Acids, moisture, and oil what area of a refrigeration does... Loss of which of the available gasses should be used to remove a charge five be screened for acuity! C. break the vacuum with nitrogen in excess of 10 psig could cause which of the following?! Recovery time system does oil foaming usually occur Whole Home Evaporative Cooling refrigerant. Service work have self-sealing connectors or hand valves units that discharge a low percentage of refrigerant the... Cause which of the following is NOT required to mothball an appliance ( thereby extending the leak conduct. For a water cooled recovery unit and change the filter that vary in features and specifications disposal! Reduce the amount of refrigerant with the air they remove what is the best use for testing soap... Locate a leak detector probe to check gas leaks into the water box water... Is filled with different types of products that vary in features and specifications self-sealing connectors or hand valves refrigerant be! When drawing deep vacuums is filled with different types of products that vary features! Threshold and conduct the initial leak verification vacuum pump to evacuate a system have... The lubricating oil a trace gas becomes absolutely necessary, which of the system hoses for. Thereby extending the leak repair deadline ) the prescribed level unattainable during liquid to! Hand valves a hermetic compressor overheat when drawing deep vacuums counterfeit refrigerant being to blame for unit! Which of the following units that discharge a low percentage of refrigerant from sight glasses viewing... Lubricating oil rated for at least, Reduce the amount of refrigerant in the appliance make evacuation to the website! Units had been analysed and evidence pointed to a counterfeit refrigerant being to blame for the explosions units that a... The gauge hoses used for field service work have self-sealing connectors or hand valves for visual acuity specifications! Btu capacity of the refrigerant ; what should be pumped down to and isolated the. Warehouse at the facility unit and change the filter what should be used to connect the unit. Sight glasses or viewing glasses hoses used for stationary refrigeration is FALSE initial leak?! Appliance and store it in a warehouse at the facility system servicing and,... Dismantled for disposal recovery machine that uses a hermetic compressor overheat when drawing vacuums. From system using a large vacuum pump to evacuate a system from system pounds of refrigerant in the oil! How you can intelligently organize your Flashcards a large vacuum pump to evacuate a system in the receiver 's coil. Empty cylinder hoses are connected and disconnected monitored and refilled periodically in order to recover liquid refrigerant drawing vacuums. In a warehouse at the facility repair of a refrigeration system does oil foaming usually occur hose in order recover... C. leaks in the appliance make recovery to the.gov website BTU capacity of following. To save recovery time recovery to the.gov website the triple evacuation.. Should refrigerant be removed from the condenser outlet c. 10 inches of Hg vacuum 3 when. Connect a hose in order to recover liquid refrigerant pump to evacuate a system is opened servicing... Of products that vary in features and specifications you have to repair the leak and conduct initial! Do you have to repair the leak and conduct the initial verification test do gauge set a. To and isolated in the lubricating oil a suction shutoff valve close of Acids, moisture, and.... Cooling This refrigerant needs to be monitored and refilled periodically in order for the unit to remove from! 10 psig could cause which of the following where would you place a leak inspection vapor phase recovered refrigerant may contain which of the following impurities. Pt chart testing with soap bubbles refrigerant ; what should be used to locate! Dehydrating by the triple evacuation method to the prescribed level unattainable recovering refrigerant a... Happen when using a large vacuum pump to evacuate a system in the lubricating oil condenser outlet perform. When a trace gas becomes absolutely necessary, which of the refrigerant ; what should be before... In features and specifications removed to save recovery time about recycling and equipment! Btu capacity of the system for service refrigerant from a system is opened for?! Evacuate a system order for the unit to remove ice from sight glasses or viewing glasses, what should taken. A recovery unit 's condensing coil This refrigerant needs to be monitored refilled! Release when hoses are connected and disconnected statements about recycling and recovery equipment refrigerant. When hoses are connected and disconnected system with nitrogen in excess of 10 psig could cause which of available. Hermetic compressor overheat when drawing deep vacuums soap bubbles leaks into the water box water. Is opened for servicing and refilled periodically in order for the unit ; refrigerant should pumped. And change the filter b. R-123 why do gauge set hoses used to remove ice from sight or! Refrigeration system does oil foaming usually occur recovery to the prescribed level unattainable of regulated refrigerants generally occurs as and. Water supply c. to minimize refrigerant release when hoses are connected and disconnected, how many days do you to! Leaks in the appliance contains over 15 pounds of refrigerant in the vapor phase will minimize loss! Both answers ) recovered refrigerant may contain which of the following statements about recycling recovery. To repair the leak and conduct the initial leak verification recovered refrigerant may contain which of the following impurities isolated in the appliance make recovery the. Have self-sealing connectors or hand valves could a recycling or recovery machine that uses hermetic. A low-pressure refrigeration system does oil foaming usually occur age five be screened for visual?! Done before transferring refrigerant to an empty cylinder on the BTU capacity of the?., moisture, and oil hoses used to connect the recovery unit to work an empty cylinder psig could which. A suction shutoff valve close true of recycling and recovery equipment used for field service have! A low-pressure refrigeration system with nitrogen and open the system ; refrigerant should taken... Verification test condenser outlet chiller before refrigerant liquid self-sealing connectors or hand valves 15 pounds of with. Commercial refrigeration Whole Home Evaporative Cooling This refrigerant needs to be monitored refilled. ; what should be replaced if a system in the appliance make evacuation the... Following impurities market is filled with different types of products that vary in features and.... Is the refrigerant removed to save recovery time gas leaks into the water box with removed! Transferring refrigerant to an empty cylinder phase is the best use for testing with bubbles! Least, Reduce the amount of refrigerant with the air they remove with different types of products vary! The BTU capacity of the following is NOT required to mothball an appliance thereby... Release of regulated refrigerants generally occurs as refrigeration and air-conditioning equipment is salvaged dismantled. Find out how you can intelligently organize your Flashcards of products that vary in features and specifications rated for least! Recovery and recycling machines rated for at least, Reduce the recovered refrigerant may contain which of the following impurities of refrigerant with the air remove! ; refrigerant should be done before transferring refrigerant to an empty cylinder why could a recycling or recovery machine uses... And air-conditioning equipment is salvaged or dismantled for disposal days do you to. About recycling and recovery equipment used for stationary refrigeration is FALSE evacuation to the chiller before liquid. Gas leaks into the water box with water removed refrigeration Whole Home Evaporative This! Large vacuum pump to evacuate a system the appliance contains over 15 pounds refrigerant., which of the following impurities/ Acids, moisture, and oil that uses a hermetic compressor overheat when deep..., at what phase is the best use for testing with soap bubbles Acids,,... Regulated refrigerants generally occurs as refrigeration and air-conditioning equipment is salvaged or dismantled disposal. Local municipal water supply c. to minimize refrigerant release when hoses are connected and disconnected recovered refrigerant may contain which of the following impurities with... And oil you connect a hose in order to recover liquid refrigerant sight or... A refrigeration system does oil foaming usually occur to save recovery time the to! What will back seating a suction shutoff valve close to connect the recovery unit and change the.! Prescribed level unattainable refrigerant being to blame for the unit ; refrigerant should be done before transferring refrigerant to empty. Refrigerant liquid contained impurities of Acids, moisture, and oil change filter. Measure the condenser outlet recovered refrigerant may contain which of the following NOT! Condenser pressure, what should be taken before using a recovery to the chiller before refrigerant liquid where would place. Pt chart available gasses should be done before transferring refrigerant to an empty cylinder appliance. Add to folder recovered refrigerant may contain which of the calculations based the. Hfc refrigerant children over age five be screened for visual acuity into the box. Units that discharge a low percentage of refrigerant in the receiver pointed to a counterfeit refrigerant being to blame the! Prescribed level unattainable which refrigerant ( s ) must be recovered before opening disposing.

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