R 410a - Study guides, Class notes & Summaries

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 ...

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 ...

UNIVERSAL R-410A

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 LEAST harmful to the ozone layer? - HFC refrigerants. How...

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...

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...

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...

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% ...

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...