EPA Universal exam 2022/20233 with 100% correct answers

Which refrigerants contain the most chlorine? CFC. R11,R12,R500. As of what date did it become unlawful to intentionally release Class I and Class II refrigerants to the atmosphere? July 1 1992. Which refrigerants have the lowest ozone depletion potential (ODP)? HFC. R134a. The molecule found in CFC and HCFC refrigerants that destroys ozone in the stratosphere is: Chlorine. Stratospheric ozone consists of: Three oxygen atoms. Stratospheric ozone depletion is a___problem: a. American b. Global c. Local d. United Nations Global. The gas in the stratosphere that protects us from ultraviolet radiation is: a. Radon. b. Sulfur Dioxide. c. Carbon Dioxide. d. Ozone Ozone. Which refrigerant is a CFC? a. R-134a. b. R-123. c. R-22. d. R-12. R12. Which refrigerant is an HCFC? a. R-134a. b. R-123. c. R-22. d. B and C above. D. R123. R22. Which refrigerant is an HFC? a. R-134a. b. R-123. c. R-22. d. R-12. R134a. Which refrigerant contains no chlorine? a. R-134a. b. R-123. c. R-22. d. R-12. R134a. The molecule found in the stratosphere that indicates stratospheric ozone depletion is taking place is: a. Carbon dioxide. b. Carbon monoxide. c. Chlorine monoxide. d. Radon. A. Chlorine monoxide. The following actions would violate the Clean Air Act (CAA): a. Knowingly releasing Class I and Class II substances. b. Failing to keep or falsifying required records. c. Failing to reach the required evacuation levels before opening a system to. the atmosphere for service. d. All of the above. D. All of the above. One time (disposable) refrigerant cylinders are used for: a. Sending refrigerant for reclaim. b. Containing recovered refrigerant. c. Recycling refrigerant. d. Virgin refrigerant. D. Virgin refrigerant. The rule of thumb for refilling approved cylinders is a maximum of [ ] percent liquid? a. 60%. b. 70%. c. 80%. d. 90%. C. 80% The time it takes to properly evacuate and dehydrate a system prior to charging with refrigerant is determined by the: a. Total volume of the system. b. Amount of non-condensable(s) (moisture) in the system. c. Ambient temperature. d. All of the above. D. All of the above. system that fails to hold a vacuum after the evacuation process: a. Has a restriction. b. May contain moisture. c. May have a leak. d. B and C above . D. May contain moisture. May have a like. To RECOVER refrigerant is to: a. Remove refrigerant in any condition from a system either in an active or passive manner, and store it in a external container without necessarily testing or processing. b. Reduce contaminants in used refrigerant by oil separation through filter driers. c. Reprocess refrigerant to a new product specification. d. Remove refrigerant and change ownership. A. The process that reduces contaminants in used refrigerant by separation with single and multiple passes through devices such as replaceable filter core driers, which reduce moisture, acid and particulate matter is: a. Restoring. b. Recovery. c. Recycling. d. Reclaim . C. Recycling. The synthetic lubricant used with HCFC - based ternary blend(s) is: a. Alkylbenzene. b. PAG. c. Mineral. d. Ester. A. Alkylbenzeze. R-134a is a 'drop-in' refrigerant for: a. R-12. b. R-22. c. R-11. d. R-134a is not a drop-in refrigerant . D. The refrigerant condition and state entering the condenser of an air conditioner is: a. Sub-cooled liquid. b. Superheated vapor. c. Sub-cooled vapor. d. Liquid . B. Superheated gas. The condition and state of the refrigerant leaving a receiver is: a. Sub-cooled liquid. b. Sub-cooled vapor. c. Superheated vapor. d. Superheated Liquid . A. The component of an air conditioning system that changes a low pressure vapor to a high pressure vapor is the: a. Condenser. b. Metering Device. c. Evaporator. d. Compressor . D. Refrigerant cylinders should be shipped: a. Upside down. b. In the vertical upright position. c. Parallel with the truck axle. d. In crates. B. For the maintenance, service or repair of small appliances, recovery equipment manufactured after [ ] must be certified by an EPA-approved organization? a. July 1, 1992. b. August 12, 1992. c. January 1, 1995. d. November 15, 1993 . D. Which best describes the definition of Type I 'Small appliance,' as defined by EPA? a. Systems manufactured, charged and hermetically sealed with five (5) pounds or less of refrigerant. b. Refrigerators, freezers, room air conditioners and central air conditioners. c. Any appliance charged with more than five (5) pounds of refrigerant. d. Any appliance charged with less than two (2) pounds of refrigerant. A. For small appliance use, the recovery equipment manufactured after Novermber 15, 1993, must be capable of recovering: a. 80% of the refrigerant when the compressor is not operation or achieve a 4 inch vacuum under ARI 740-1993. b. 90% of the refrigerant when the compressor is operation or achieve a 4 inch vacuum under ARI 740-1993. c. 99% of the refrigerant regardless of compressor operation and achieve a 10 inch vacuum under ARI 740-1993. d. A and B above . D. A&B. The sale of Class I and Class II refrigerants will be restricted to technicians certified by an EPA-approved program after: a. July 1, 1992. b. November 1993. c. August 12, 1993. d. November 14, 1994. D. The release of vapor from the top of a graduated charging cylinder, when filling, should: a. Be vented to atmosphere. b. Be vented if the quantity does. not exceed three (3) pounds. c. Not be vented and should be recovered. d. Be vented, but not inhaled . C. Should regulations of the Clean Air Act (CAA) change after a technician is certified: a. The technician must take a new test to be recertified b. All technicians who previously passed with an 80% will be grandfathered. c. It will be the technician's responsibility to learn and comply with future changes in the law. d. The technician must be retested and pass the exam with an 84% . C. Containers of refrigerant R-134a are color coded: a. Green. b. White. c. Yellow. d. Light Blue . D. System dependent (passive) refrigerant recovery of small appliances: a. Do not require an operation compressor. b. Requires 80% of the refrigerant of be recovered. c. Recovers refrigerant in a non-pressurized container. d. All of the above. D. Mixed refrigerants that are sent to a reclaim center: a. Will be disposed of at the owner's expense. b. Can be reclaimed and resold. c. Can be reused in its current state. d. Just need filtering . A. Before disposing of a small appliance containing R-12, it is necessary to: a. Pressurize with nitrogen. b. Recover the refrigerant. c. Turn up side down. d. Thoroughly leak check . B. Hydrochloric and hydrofluoric acids are: a. Caused from CFC's or HCFC's in the presence of moisture being exposed to high heat. b. Damaging to the windings found in hermetic refrigeration and air conditioning systems. c. To be avoided when handling with bare hands. d. All the above. D.