CFC Alternative Refrigerants & Transitions 5

Question 1

Which EPA program requires that refrigerants used as substitutes for ozone-depleting substances be reviewed for safety and environmental acceptability?

Accepted Answer

SNAP (Significant New Alternatives Policy) Program

Answer

The EPA SNAP program, established under Clean Air Act Section 612, evaluates and lists acceptable and unacceptable substitute refrigerants for various end-uses.

Question 2

What is the GWP of R-410A, the most commonly used refrigerant in residential air conditioning before the current transition period?

Accepted Answer

2088

Answer

R-410A has a GWP of 2088 (100-year), which is why regulators have targeted it for phase-down under the AIM Act and Kigali Amendment.

Question 3

When transitioning from R-12 to R-134a in an automotive AC system, which component typically requires replacement due to incompatibility?

Accepted Answer

The accumulator/drier and hoses (barrier hoses required)

Answer

R-134a has smaller molecules than R-12 and permeates standard hoses, requiring barrier hoses; the accumulator/drier must also be replaced to ensure compatibility with POE oil.

Question 4

Which of the following best describes an azeotropic refrigerant blend?

Accepted Answer

A blend that behaves like a single-component refrigerant with no temperature glide

Answer

Azeotropic blends behave like pure substances, maintaining a constant composition during phase change and exhibiting negligible temperature glide.

Question 5

Under EPA regulations, what must a technician do if they discover a leak in a commercial refrigeration system containing 50 or more pounds of refrigerant that has exceeded the leak rate threshold?

Accepted Answer

Repair the leak within 30 days or retrofit/retire the equipment within 120 days

Answer

EPA Section 608 regulations require that leaks in systems with 50+ pounds of refrigerant exceeding threshold rates be repaired within 30 days, with retrofit/retirement within 120 days if repair is not feasible.

(CFC) Chlorofluorocarbon Certification Practice Test

(CFC) Chlorofluorocarbon Certification Practice Test

CFC Alternative Refrigerants & Transitions 5