EPA 608 Core · Refrigeration Fundamentals · Hard
What characterizes a zeotropic refrigerant blend (400-series)?
Answer: C. It has a temperature glide when it boils.
- AIt boils at one constant temperature.
- BIt consists of a single pure chemical.
- CIt has a temperature glide when it boils.✓ Correct
- DIt cannot fractionate when leaking.
Why C is right
Zeotropic blends (400-series) boil and condense over a range of temperatures (glide).
More Core questions
- Which PT chart value do you use to calculate subcooling for a zeotropic blend?
- What happens when a zeotropic blend leaks from a system?
- 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?
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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.