R 410a - Study guides, Class notes & Summaries

The EPA regulations require that leaking commercial or industrial process refrigeration equipment must be repaired when the leak rate exceeds _____ of the charge per year. - 35% The proper charging method for blended (non-azeotropic) refrigerants (400 Series) is to use a remove the charge from the cylinder as a? - Liquid Your recovery/recycling machine has R-502 refrigerant in it. You now have to recover refrigerant from a unit with R-22. What must be done before the R-22 refrigerant can be...

EPA 608 Type 1 Questions and Answers 100% Pass Recovery equipemnt used for the service or repair of small appliances must be certified by an EPA approved lab if the recovery equipment was made after November 15, 1993 Recovery devices made before 11-15-93 and are used for recovery of refrigerant from small appliances must be capable of: recovering 80% of the refrigerant whether or not the compressor is operating or achieving a 4 inch vacuum under conditions of ARI 740-1993 EPA's definition of...

The state of the refrigerant entering the metering device is? - answer-a subcooled high pressure liquid. What type of refrigerant is used in very high-pressure appliances? - answer-r-503 What type of refrigerant is used in medium pressure appliances? - answer-r-500 What type of refrigerant is used in high pressure appliances? - answer-r-410a and r-22 What device is located at the end of the liquid line? - answer-the expansion device. What type of refrigerants are the least harmful...

-Suva 410a -AZ-20 -Puron - R-410a is also known as? 0.3 - The temperature glide for R-410a is less than _____ degrees Fahrenheit over air conditioning and refrigeration operating ranges. -Can be irritating to the skin -Is hydroscopic -Has improved heat transfer characteristics over mineral oils - Polyol Ester (POE): 50 psig - The low pressure control on R-410a systems will open at: Absolute discharge pressure divided by absolute suction pressure - Compression ratio is calculated ...

UNIVERSAL R-410A

EPA 608 (TYPE II) Exam Accurate Questions & AnswWhen a new system has been assembled, the first thing to do is? - ANSWER 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? - ANSWER 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 be repaired when the ...

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 be repaired when the leak rate exceeds _________ of the charge per year? : 15% ...

Which of the following is not a violation of refrigerant management regulations under the clean air act? : Servicing a system that uses CFCs or HCFCs after the phase of those refrigerant Which of the following refrigerants has the lowest global warming potential? : R-600a How does the global warming potential of R410A compare to carbon dioxide? : It is thousands of times greater How does the global warming potentials of isobutane (R-600a), propane (R-290), and R-441A compare to the G...

R-410A safety & Training Pre-Test 2023/2024.Recovery cylinders used with R-410A must have a DOT rating of: - ANSWER either "DOT 4BA 400" or "DOT 4BW 400" A system using R-410A refrigerant has bubbles in the sight glass. Technician A says that the system must be low on refrigerant. Technician B says that the bubbles could be caused by the blended refrigerant flashing in the increased volume of the sight glass. Who is correct? - ANSWER Technician B only When charging a R-410A system that...

What does ozone in the stratosphere above the earth consist of? a. Molecules containing 2 oxygen atoms b. Molecules containing 3 oxygen atoms c. Molecules containing 4 oxygen atoms d. Molecules containing 5 oxygen atoms - b. Molecules containing 3 oxygen atoms Which of the following refrigerants has the lowest global warming potential? a. R-134a b. R-407C c. R-410A d. R-600a - d. R-600a Which of the following gases is used as the baseline measurement for global warming potentia...