EPA 608 Core · Substitute Refrigerants & Oils · Easy
Which oil was historically the standard for CFC refrigerants?
Answer: D. Mineral oil
- APolyolester (POE)
- BPolyalkylene Glycol (PAG)
- CAlkylbenzene (AB)
- DMineral oil✓ Correct
Why D is right
Mineral oil was the traditional lubricant used with older CFC refrigerants.
More Core questions
- What does 'hygroscopic' mean regarding refrigeration oils?
- Can mineral oil be used to retrofit a CFC system to an HFC refrigerant?
- What oil is most commonly used in ternary blends containing HCFCs?
- Which refrigerant is approved as an exempt substitute for new household fridges?
- Which type of oil is most commonly used with HFC refrigerants?
Go deeper with the study guide A2L Refrigerants and the R-410A Transition: A Tech’s Guide, try the free 10-question test or browse all EPA 608 practice questions.
A practice question written for study, checked against 40 CFR Part 82, Subpart F. It is not an official EPA exam question, and this site is not affiliated with the U.S. EPA.