Study guides, Class notes & Summaries

What are the typical uses of the center port of gauge set? - Used during evacuation charging and recovery procedures. What color are the gauges on a manifold gauge set? - Low pressure is blue High pressure is red. What are the typical ranges of pressure measurements used on the gauges of a manifold gauge set? - High side is 0 to 500 PSIG; Low side is 0 to 350 PSIG and 0 to 30 in. Hg below atmospheric pressure. Is the refrigerant leaving a condenser at a high or low pressure? Is it a l...

November 14, 1994 - What date was the sale of CFC's & HCFC's restricted to technicians certified in refrigerant recovery? Memorize it, ya'll. - 1987- Montreal Protocol July 1 1992- Violation to vent CFCs or HCFCs Nov 15 1993- Recovery/Recycling equipment must be certified and labeled by EPA AND Before this date recovery equipment needed to be capable of removing 80% of the refrigerant, w or wo compressor, or 4 in Hg After this date recovery equipment needs to be capable of remov...

Why are flammable HFO refrigerants classified as A2L and not A2? - They have low flammability, being less flammable than HC refrigerants. Which of the following statements is true? - Propane cylinders for grilling contains impurities that refrigerant-grade propane does not have. Over-evacuation of a system can ________ - never occur; you can never pull too much air or other impurities from a system A system containing a flammable refrigerant must have the process tubes or service conn...

EPA 608 Core Test Sample Questions And Answers All Verified As of what date did it become unlawful to release Class 1 and Class II refrigerants to the atmosphere? a. July 1, 1992 b. July 1, 1993 c. November 14, 1994 d. January 1, 1996 - ANS a. July 1, 1992 What is the ozone layer and why is it important to us on Earth? a. Thin layer of R-22 in the atmosphere that filters UV. b. Protective shield for Earth from the sun's harmful ultraviolet (UV) rays in the stratosphere layer th...

HVAC: EPA 608 Certification Study Guide Exam Questions And Answers Are there drop-in replacements for R-12 systems? Why or why not? - ANS 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? - ANS Ester based oils and they do not mix with other oils What type of lubricant is used with HCFCs? - ANS Alkylbenzene lubricant What is the difference b/w ternary blend a az...

EPA 608 study material including (Core, type 1, 2 and 3) Exam Questions And Answers a vacuum pump should be connected - as far away from the pump as possible a high capacity vacuum pump and short, large diameter hoses will - dramatically reduce emissions, pressure drop, and evacuation/dehydration time ozone contains three - oxygen atoms one chlorine atom can destroy - 100,000 ozone molecules CFC's do not dissolve in water and do not breakdown into other compounds that dissolve i...

EPA 608 Certification Exam Questions And Answers What date was the sale of CFC's & HCFC's restricted to technicians certified in refrigerant recovery? - ANS November 14, 1994 Section 608 of the Federal Clean Air Act requires technicians to what? - ANS Recover all refrigerants. The objective of the Clean Air Act is to protect what? - ANS The earth's stratosphere. HFC's - ANS HydroFluoroCarbons CFC's - ANS ChloroFluoroCarbons ODP - ANS Ozone Depletion Potential ...

EPA 608 Type 3 Exam Questions And Answers On low pressure chillers, moisture typically enters the refrigerant system through - ANS air leaks from areas with gaskets or fittings The maximum test pressure for leak testing a low pressure centrifugal is: - ANS 10 psig Leak test and repair the chiller to reduce refrigerant loss from a purge unit on CFC-11 chiller - ANS ... A hydrostatic tube test kit is used to: - ANS determine if a tube leaks Commercial and industrial proce...

UPDATED EPA 608 QUIZLET (2023) EXAM QUESTIONS AND ANSWERS the state of the refrigerant entering the metering device is? - ANS A subcooled high pressure liquid. what type of refrigerant is used in VERY high-pressure appliances? - ANS R-503 what type of refrigerant is used in MEDIUM pressure appliances? - ANS R-500 what type of refrigerant is used in HIGH pressure appliances? - ANS R-410A and R-22 what device is located at the END of the liquid line? - ANS The expansion dev...

EPA 608 Practice exam type 1 Questions And Answers The sale of reclaimed CFC, HCFC, HFC, and HFO refrigerants is_______. - Restricted to technicians who are EPA certified and refrigerant recovery A small Appliance is defined as a system that is - Manufactured, fully charged, and hermetically sealed in a factory with a charge of 5 pounds or less A __________ recovery device can be use for type 1 small appliance applications or type 2 applications if the total charge is below 15 pounds. ...