Universal R-410A Practice Exam Study Guide 2024 Graded A

Polyolester (POE) oils stored in plastic containers will: -Separate -Become more alkaline -Become acidic -Absorb moisture through the plastic - Absorb moisture through the plastic R-407C has: -A foul odor -To be charged in the vapor phase -The ability to fractionate -No temperature glide - The ability to fractionate A condensing unit designed for use with R-22: -Must be replaced with a model designed for use with R-410A -Cannot withstand the higher pressure of R-410A -Both A and B -None of the above - Both A and B In a refrigeration system, oil and refrigerant: -Contain alkybenzene -Mix with each other -Do not touch each other -Are not miscible - Mix with each other Removal of refrigerant from a system can be accomplished by these two basic methods: -Condensation and evaporation -Dew point and bubble point -Superheating and subcooling -Active and passive - Active and passive Ozone depletion is caused by: -HFCs -Chlorine and Bromine -R-410A refrigerants