EPA 608 Core · Refrigeration Fundamentals · Medium
What happens when a zeotropic blend leaks from a system?
Answer: B. Its composition changes (fractionation).
- AThe refrigerant becomes highly toxic.
- BIts composition changes (fractionation).✓ Correct
- CThe ODP of the blend increases.
- DThe system pressure remains perfectly stable.
Why B is right
Fractionation occurs because the different components leak at different rates.
More Core questions
- What is the state of refrigerant entering the compressor?
- What is the state of refrigerant leaving the condenser?
- What component changes a high-pressure liquid to a low-pressure liquid?
- What does the 'R' in refrigerant designations (e.g., R-22) stand for?
- What type of refrigerant is R-134a?
Go deeper with the study guide EPA 608 Core Exam: Study Guide for 2026, 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.