Paul Marks Library

HVAC: EPA 608 Certification Study Guide| Questions and 100% correct answers| Latest Update Are there drop-in replacements for R-12 systems? Why or why not? No because the new refrigerants are incompatible with the oils and lubricants used in R-12 systems. What type of oil is used in R-134a and what oils will it mix with? Ester based oils and they do not mix with other oils What type of lubricant is used with HCFCs? Alkylbenzene lubricantWhat is difference b/w ternary blend a azeotropic...

EPA 608 Practice exam Type 3| Answered 100% correctly| Latest 2026/2027 The maximum test pressure for leak testing a low-pressure centrifugal chiller is 10 psig Excessive operation of a purge system means The system has a leak on the sub-ambient pressure side of the system For a commercial refrigeration system with a charge of 50 pounds or more refrigerant, a substantial (or threshold) week rate will be reduced to ________ after January 1, 2019.20% For a comfort cooling system with a c...

EPA 608 Type 3 Exam answered 100% correctly 2026 On low pressure chillers, moisture typically enters the refrigerant system through air leaks from areas with gaskets or fittings The maximum test pressure for leak testing a low pressure centrifugal is: 10 psig Leak test and repair the chiller to reduce refrigerant loss from a pruge unit on CFC-11 chiller ...A hydrostatic tube test kit is used to: determine if a tube leaks Commercial and industrial process refrigeration systems must be ...

EPA 608 (TYPE II) Exam| Questions and 100% correct Answers| Latest Update 2026/2027 When a new system has been assembled, the first thing to do is? Pressurize the system with an inert gas & leak check. After installation of a field-piped R-410A split heat pulp, the unit should first be? Pressurized with nitrogen then leak checked. The EPA regulations require that any appliances containing more than 50 pounds of refrigerant (except for commercial & industrial process refrigeration) must b...

EPA 608 (CORE) Exam questions and correct answers 2026 When moisture exists in an operating system, what is most likely to occur? Acid will form. What factor(s) affects the speed of evacuation? 1) The size of the equipment being evacuated. 2)The ambient temperature. 3) The amount of moisture in the systemA system is considered dehydrated when? The vacuum indicator shows you have reached & held the required finished vacuum. The over-evacuation of a system: Does not occur. The size (ca...

EPA 608 Certification| Actual Exam questions and 100% correct answers| Latest Update What date was the sale of CFC's & HCFC's restricted to technicians certified in refrigerant recovery? November 14, 1994 Section 608 of the Federal Clean Air Act requires technicians to what? Recover all refrigerants. The objective of the Clean Air Act is to protect what? The earth's stratosphere. HFC'sHydroFlouroCarbon's CFC's ChloroFluoroCarbon's ODP Ozone Depletion Potential ...

UPDATED EPA 608 QUIZLET (2026) Questions and correct answers the state of the refrigerant entering the metering device is? A subcooled high pressure liquid. what type of refrigerant is used in VERY high-pressure appliances? R-503 what type of refrigerant is used in MEDIUM pressure appliances? R-500 what type of refrigerant is used in HIGH pressure appliances? R-410A and R-22 what device is located at the END of the liquid line? The expansion device. what type of refrigerants are the L...

EPA 608 Certification, EPA 608| Complete exam questions and 100% verified answers|Latest November 14, 1994 What date was the sale of CFC's & HCFC's restricted to technicians certified in refrigerant recovery? Memorize it, ya'll. 1989- Montreal Protocol July 1 1992- Violation to vent CFCs or HCFCs Nov 15 1993- Recovery/Recycling equipment must be certified and labeled by EPAAND Before this date recovery equipment needed to be capable of removing 80% of the refrigerant, w or ...

EPA 608 CORE EXAM| COMPLETE QUESTIONSAND 100% CORRECT ANSWERS| LATEST What characteristic or characteristics of CFCs make them more likely than other chlorine compounds to reach the stratosphere? Dont disolve iin water Each chlorine atom in the stratosphere can destroy how many ozone molecules? 100,000 ozone molecules Which refrigerant contains a CFC? R500, R12, R113 or R11? Theyre all CFC's HYDROCHLORIC FLORICCARBON (HCFC) refrigerant contain?Hydrogen, chlorine, flourine and carb...

EPA 608 Core exam questions and correct answers 2026/2027 all of the above Refrigeration technicians who violate the clean air act can: A. lose their epa certification B. be fined. C. be required to appear in federal court D. all of the above november 1995 It has been illegal to vent substitutes for CFC and HCFC refrigerants since: R22which refrigerant has the lowest odp? R22, R11, R12, R113 recover to remove refrigerant in any condition from a system and store it in an external co...