Refrigerant Management & Environmental Compliance Flashcards

Under EPA Section 608, what is the maximum allowable leak rate for a commercial refrigeration system with a charge of 50 lbs or more before repair is required?

Answer: 20% per year

EPA Section 608 sets the leak rate threshold for commercial refrigeration systems at 20% of charge per year, triggering a mandatory repair obligation.

Which refrigerant blend is classified as an R-400 series and is a zeotropic mixture?

Answer: R-404A

R-404A is a zeotropic blend in the R-400 series, meaning its components evaporate at different rates and it exhibits temperature glide.

What does 'fractionation' mean in the context of zeotropic refrigerant blends?

Answer: The separation of blend components due to differing vapor pressures

Fractionation occurs when components of a zeotropic blend separate due to different vapor pressures, changing the mixture's composition and properties.

Which of the following is a PRIMARY reason R-410A cannot be used as a drop-in replacement for R-22?

Answer: R-410A operates at significantly higher pressures than R-22

R-410A operates at roughly 60% higher pressures than R-22, making it incompatible with components and compressors designed for R-22 systems.

Under the AIM Act, EPA is required to phase down HFC production and consumption by what percentage by 2036?

Answer: 70%

The AIM Act mandates a 70% reduction in HFC production and consumption by 2036 compared to the established baseline.

Which refrigerant requires technicians to use ONLY equipment specifically certified and labeled for that refrigerant when recovering it?

Answer: R-410A

R-410A's high operating pressures require recovery equipment specifically rated and certified for its pressure range to prevent equipment failure.

What is the term for the temperature difference between the refrigerant's dew point and bubble point in a zeotropic blend?

Answer: Temperature glide

Temperature glide is the difference between the bubble point (start of evaporation) and dew point (end of evaporation) of a zeotropic refrigerant blend.