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R-410A Test With Questions And Answers

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R-410A TEST WITH QUESTIONS AND ANSWERS...

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R-410A TEST WITH QUESTIONS AND ANSWERS A liquid changes to a vapor by absorbing - ANSWER latent heat Temperature glide can range from - ANSWER 0.2 deg to 16 deg F To find the correct saturation temperature for a given pressure, its best to u se - ANSWER A pressure/temperature chart R-410A systems may be topped off after a leak because - ANSWER It behaves like a pure compound The temperature of a single compound at 100% saturated vapor with no superheat is - ANSWER Equal to its saturation temperature for that pressure Charging an R-410A system until the sight glass is clear may result in - AN SWER Both A and B Polyalkylene Glycol (PAG) Oils - ANSWER Are extremely hygroscopic An advantage of ester-based oils such as Polyolester is - ANSWER They have a wax-free composition Which refrigerant has an ozone depletion potential of zero? - ANSWER R-134A If R-410A is ingested - ANSWER do not induce vomiting Liquid lines used with R-22 - ANSWER May be used with R-410A if sized a nd properly cleaned Whenever possible, to avoid fractionation, charging of a refrigeration system incorporating a near-azeotropic blend should be done with - ANSWER Liq uid refrigerant R-407C pressures and temperatures are similar to - ANSWER R- 22 Technicians handling liquid refrigerant should wear gloves and - ANSWE R Approved eye protection

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