EPA 608 Core · Safety · Easy
Why must you never pressurize a system with pure oxygen?
Answer: D. Oxygen mixed with compressor oil can explode.
- AOxygen will freeze the moisture inside.
- BOxygen damages the manifold gauges.
- COxygen creates toxic phosgene gas.
- DOxygen mixed with compressor oil can explode.✓ Correct
Why D is right
Pure oxygen under pressure violently explodes when it contacts petroleum-based oils.
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.