EPA 608 Certification Exam Questions with 100% Correct Answers | Latest Version (2025/2026) Expert Verified

What date was the sale of CFC's & HCFC's restricted to technicians certified in refrigerant recovery? - Correct answer-November 14, 1994 Section 608 of the Federal Clean Air Act requires technicians to what? - Correct answer-Recover all refrigerants. The objective of the Clean Air Act is to protect what? - Correct answer-The earth's stratosphere. HFC's - Correct answer-HydroFlouroCarbon's CFC's - Correct answer-ChloroFluoroCarbon's ODP - Correct answer-Ozone Depletion Potential Which international treaty agreement was the basis for Section 608? - Correct answerThe Montreal Protocol. Depletion of the ozone in the stratosphere is know to cause what 6 things? - Correct answer-1.Crop losses 2.Increases in eye diseases 3.Skin Cancer 4.Reduced marine life 5.Deforestation 6.Increased ground level ozone What happens when CFC or HCFC molecules get in the stratosphere & free atoms of Chlorine are set free? - Correct answer-These atoms attack Ozone Molecules causing the formation of Chlorine Monoxide (CLO), after colliding with another Ozone Molecule, causes 2 Oxygen (O2) molecules to be made & leaving an atom of chlorine to act as "Free Agent" starting the process over until 100,000 molecules of Ozone are destroyed by just one atom of chloride. What date was recovery equipment required to be certified by a lab, & achieve higher evacuation levels, & have low loss fittings? - Correct answer-November 15, 1993 On what date was technician certification required? - Correct answer-November 14, 1994 What date was CFC's phased out of production? - Correct answer-December 31, 1995 What is EPA 608 Type I certification? - Correct answer-Persons who maintain, service, repair, or dispose of small appliances (containing 5 pounds of refrigerant (or less). What is EPA 608 Type II certification? - Correct answer-Persons who maintain, service, repair, or dispose of high and very high pressure appliances. Except small appliances and motor vehicle air conditioning systems. What is EPA 608 Type III certification? - Correct answer-Persons who maintain, service, repair, or dispose of low pressure appliances. What is EPA 608 Universal certification? - Correct answer-Persons who maintain, service, repair, or dispose of both low and high pressure equipment, as well as appliances. HCFC's - Correct answer-HydroChloroFluoroCarbons What are HydroChloroFluoroCarbons? - Correct answer-Commonly known as HCFC's, they are a group of man-made compunds containing hydrogen, chlorine, fluorine, and carbon. A recovery cylinder must not be filled more than ___ % of it's capacity by weight? - Correct answer-80% How should refrigerant cylinders be shipped? - Correct answer-Up-right with proper DOT classification tags. What oil MUST be used with ALL HFC's for HVAC/Refrigeration but will also work with CFC's and HCFC's. - Correct answer-Polyolester HCFC's have very low atmospheric concentrations measured in parts per? - Correct answer-Trillion All cooling systems containing more than 50 lbs. of refrigerant must be repaired when the annual leak rate exceeds___? - Correct answer-15% Mineral Oils are used with? - Correct answer-All CFC's Alkebenzene is used alone or as an additive for? - Correct answer-HCFC's (Will also work with CFC's) POE - Correct answer-Polyolester What is the definition of a Type I Appliance? - Correct answer-A small appliance that is manufactured, charged, and hermetically sealed in a factory with 5 Lbs. of refrigerant or less. What is the definition of a Type II Appliance? - Correct answer-High pressure or very high pressure appliances except for small appliances and motor vehicle air conditioning. Refrigeration systems containing more than 5 Lbs. of high or very high pressure refrigerants. What is the definition of a Type III Appliance? - Correct answer-Low pressure equipment like low pressure chillers. All refrigerants are assumed to be a single chemical if they are numbered what? - Correct answer-1-399 and 600 and above. What is an Azeotrope? - Correct answer-A mixture of two or more liquids in such a ratio that it's composition cannot be changed by vaporizing it. Azeotrope's are numbered what? - Correct answer-500 to 599 What is fractionation? - Correct answer-When the refrigerant leaks, it leaks out in different rates due to the different pressures. What is Temperature Glide? - Correct answer-When the temperature of the vaporizing refrigerant changes, even though the pressure remains the same. What are the two basic types of recovery devices? - Correct answer-Self-Contained and System-Dependent. System-Dependent devices may only be used on appliances containing how much refrigerant? - Correct answer-15 Lbs of refrigerant or less What MUST be placed on a refrigerant cylinder being returned for reclaiming. - Correct answer-A refrigerant label. After completing the transfer of liquid refrigerant between a recovery unit and a refrigeration system, you should guard against what? - Correct answer-Trapping liquid refrigerant between the service valves. When pressurizing a system with nitrogen, you should always? - Correct answerCharge through a pressure regulator. What are the three "R's"? - Correct answer-Recover, Recycle, and Reclaim. In relation to the three "R's" what is Recover? - Correct answer-To remove refrigerant in any condition from a system and store it in an external approved container. In relation to the three "R's" what is Recycle? - Correct answer-To clean refrigerant for reuse by seperating the oil from the refrigerant and removing moisture from the refrigerant by passing it through one or more filter dryers. Can Recycled refrigerant be resold? - Correct answer-It cannot be re-sold but it can be re-used. In relation to the three "R's" what is Reclaim? - Correct answer-To process refrigerant to a level equal to new (virgin) product specifications as determined by chemical analysis. Can Reclaimed refrigerant be resold? - Correct answer-Yes, but must meet the standard set forth in ARI 700 before it can be resold. What chemical has been found in the stratosphere indicating ozone depletion? - Correct answer-Chlorine Monoxide (CLO) What are 5 Type I appliances? - Correct answer-1.Household refrigerators 2.Household freezers 3.Room air conditioners 4.Water Coolers 5.Drinking fountains What are 6 Type II appliances? - Correct answer-1.Walk-in coolers 2.Walk-in freezers 3.Reach-in refrigerators 4.Reach-in freezers 5.Residential & Commercial comfort cooling systems 6.Ice machines What is an example of a Type III appliance? - Correct answer-Low pressure chiller. When is "Dew Point" used? - Correct answer-When calculating Superheat. When is "Bubble Point" used? - Correct answer-When calculating Sub-cooling. What does the EPA require on all Type I equipment that uses Class I or Class II refrigerants. - Correct answer-EPA requires a service aperature (process stub). TXV - Correct answer-Thermostatic Expansion Valve The EPA considers a major repair to be the replacement of what 4 items? - Correct answer-1.Evaporator 2.Condenser 3.Compressor 4.Auxillary Heat Exchanger When the refrigerant is put back into a Type III chiller, following recovery and system repair, where is it added? - Correct answer-The charging valve on the evaporator.