EPA Certification Exam

EPA Certification Exam Which Refrigerants contain the most chlorine? - CFC's As of what date did it become unlawful to intentionally release Class 1 and Class 2 refrigerants to the atmosphere? - July 1, 1992 Which Refrigerants have the lowest zone depletion potential? - HFC's The molecule found in CFC's and HCHC's refrigerants that destroys the ozone in the stratosphere is: - Chlorine Stratospheric ozone consists of: - Three oxygen atoms Stratospheric ozone depletion is a _________ problem: - Global The Gas in the stratosphere that protects us from ultraviolet radiation is: - Ozone Which refrigerant is a CFC? - R-12 Which refrigerant is an HCFC? - R-123 & R-22 Which refrigerant is an HFC? - R-134a Which refrigerant contains no chlorine? - R-134a The Molecule found in the stratosphere that indicates stratospheric ozone depletion is taking place is: - Chlorine monoxide The following actions would violate the clean air act (CAA): - Knowingly releasing Class 1 Class 2 substances failing to keep or falsifying required records failing to tech the required evacuation levels before opening a systems to the atmosphere for service One time (disposable) refrigerant cylinders are used for: - Virgin refrigerant The rule of thumb for refilling approved cylinders is a maximum of _____ percent liquid? - 80% The time it takes to properly evacuate and dehydrate a system prior to charging with refrigerant is determined by the: - Total volume of the system Amount of non-condensibles (moisture) in the system Ambient Temperature A system that fails to hold a vacuum after the evacuation process: - May contain moisture May have a leak To recover refrigerant is to: - Remove refrigerant is any condition from a system in either an active or passive manner, and store it in an external container without necessarily testing or processing. The process that reduces contaminate in used refrigerant by oil separation with single and multiple passes through devices such as replaceable filter core driers, which reduces moisture, acidity, and particulate matter is: - Recycling The synthetic lubricant used with HCFC-based ternary blends is: - Alkyl benzene R-134a is "drop-in" refrigerant for: - R-134a is not a Drop-in refrigerant The refrigerant condition and state entering the condenser of an air conditioner is a: - Superheated Vapor The condition and state entering the condenser of an air conditioner is a: - Subcooled liquid The component of an air conditioning system that changes a low pressure vapor to a high pressure vapor is the: - Compressor Refrigerant cylinders should be shipped - In the vertical upright position For the maintenance, service or repair of small appliances, recovery equipment manufactured after ________ must be certified by an EPA approved organization? - November 15, 1993 Which best describes the definition of Type 1 "small appliance" as defined by EPA? - Systems manufactured, charged and hermetically sealed with five (5) pounds or less of refrigerant For small appliances use, the recovery equipment manufactured after November 15, 1993, must be capable of recovery: - 80% of the refrigerant when the compressor is not operating or achieve a 4-inch vacuum under ARI 740-1993 90% of the refrigerant when the compressor is operating or achieve a 4-inch vacuum under ARI 740-1993 The sale of Class 1 and Class 2 refrigerants will be restricted to technicians certified by an EPA approved program after: - November 14, 1994 The release of vapor from the top of a graduated charging cylinder, when filling, should: - Not be vented and should be recoverd Should regulation of the clean air act (CAA) change after a technicians certified: - It will be the technicians responsibility to learn and comply with future changes in the law Containers of refrigerant R-134a are cooler coded: - Light Blue