EPA 608 Core · Substitute Refrigerants & Oils · Medium
Which type of oil is most commonly used with HFC refrigerants?
Answer: C. Polyolester (POE)
- AMineral oil
- BAlkylbenzene (AB)
- CPolyolester (POE)✓ Correct
- DPolyalkylene Glycol (PAG)
Why C is right
POE oil is the standard synthetic lubricant used with HFC and HFO refrigerants.
More Core questions
- Which oil is primarily used in automotive HFC-134a AC systems?
- Which oil was historically the standard for CFC refrigerants?
- 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?
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.