EPA 608 Core · Refrigeration Fundamentals · Easy
What component changes a high-pressure liquid to a low-pressure liquid?
Answer: C. The metering device.
- AThe compressor.
- BThe evaporator coil.
- CThe metering device.✓ Correct
- DThe condenser coil.
Why C is right
The metering device drops the pressure, and a small part of the liquid flashes to vapor, which cools the rest before it enters the evaporator.
More Core questions
- What does the 'R' in refrigerant designations (e.g., R-22) stand for?
- What type of refrigerant is R-134a?
- What type of refrigerant is R-1234yf?
- How does a zeotropic blend differ from a pure refrigerant?
- What is 'temperature glide' in a zeotropic blend?
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.