EPA 608 Core · Refrigeration Fundamentals · Hard
Which PT chart value do you use to calculate subcooling for a zeotropic blend?
Answer: D. Bubble point.
- ADew point.
- BCritical point.
- CTriple point.
- DBubble point.✓ Correct
Why D is right
For zeotropic blends, use the bubble point for subcooling and dew point for superheat.
More Core questions
- 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?
- What does the 'R' in refrigerant designations (e.g., R-22) stand for?
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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.