Which refrigerant became the usual substitute for R-12 in household refrigerators?
Recovery techniques · EPA 608 Type I. The correct answer, and the reasoning behind it.
Identifying refrigerants, access valves, passive recovery and solderless fittings.
The question
Which refrigerant became the usual substitute for R-12 in household refrigerators?
- R-22
- R-11
- R-134aCorrect answer
- R-123
Why “R-134a” is correct
EPA's Type I test topics name HFC-134a (R-134a) as the likely substitute for CFC-12 (R-12). R-134a contains no chlorine, so it does not deplete ozone.
Source: EPA: Test Topics
Why the other answers are wrong
- R-22 — R-22 is an HCFC used mainly in air conditioning; it did not become the usual R-12 replacement in refrigerators.
- R-11 — R-11 is a low-pressure CFC used in chillers.
- R-123 — R-123 is a low-pressure HCFC used in chillers.
Practice more of this
More EPA 608 Type I practice questions, or see every EPA 608 practice test.
Unofficial, not affiliated with the EPA or any EPA-approved certifying organization. Questions are original practice written from public EPA material, not real exam questions.