EPA 608 Core · Safety · Hard
Under ASHRAE 34, what does the 'B' signify in B2L?
Answer: B. Higher toxicity.
- ALower toxicity.
- BHigher toxicity.✓ Correct
- CMild flammability.
- DHigh flammability.
Why B is right
The letter 'B' in ASHRAE 34 indicates higher toxicity compared to 'A'.
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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.