EPA 608 Core · Safety · Medium
Under ASHRAE Standard 34, what does 'A1' signify?
Answer: A. Non-flammable and lower toxicity.
- ANon-flammable and lower toxicity.✓ Correct
- BMildly flammable and higher toxicity.
- CHighly flammable and lower toxicity.
- DNon-flammable and higher toxicity.
Why A is right
A1 means the refrigerant has lower toxicity ('A') and is non-flammable ('1').
More Core questions
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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.