CFC Alternative Refrigerants & Transitions 3

Question 1

Under the AIM Act, EPA is authorized to phase down HFCs by what maximum percentage over 15 years?

Accepted Answer

85%

Answer

The AIM Act authorizes EPA to reduce HFC production and consumption by 85% over 15 years from a baseline period.

Question 2

R-1234yf is primarily used as a replacement for which refrigerant in mobile air conditioning systems?

Accepted Answer

R-134a

Answer

R-1234yf was developed specifically to replace R-134a in mobile air conditioning systems due to its GWP of less than 1.

Question 3

Which refrigerant blend is being widely adopted as a lower-GWP alternative to R-410A in residential heat pumps, with approximately 78% lower GWP?

Accepted Answer

R-454B

Answer

R-454B has a GWP of approximately 466 compared to R-410A's GWP of 2088, representing about a 78% reduction and making it the leading next-generation residential heat pump refrigerant.

Question 4

What safety classification applies to R-1234yf?

Accepted Answer

A2L (mildly flammable, low toxicity)

Answer

R-1234yf is classified A2L by ASHRAE, meaning it has low toxicity but mild flammability requiring special handling and equipment design.

Question 5

When fractionation occurs in a zeotropic blend during a leak, what is the technician's required action?

Accepted Answer

Recover remaining refrigerant and recharge with a full, fresh charge

Answer

When fractionation changes the blend composition, technicians must recover the remaining refrigerant and recharge with a complete new charge to restore proper blend ratios.

(CFC) Chlorofluorocarbon Certification Practice Test

(CFC) Chlorofluorocarbon Certification Practice Test

CFC Alternative Refrigerants & Transitions 3