EPA 608 Type III · Refrigeration Fundamentals · Medium
What does frequent operation of the purge unit indicate?
Answer: B. The system has an air leak.
- AThe system is overcharged with refrigerant.
- BThe system has an air leak.✓ Correct
- CThe compressor oil needs replacing.
- DThe condenser tubes are perfectly clean.
Why B is right
If the purge unit runs constantly, it means a significant amount of air is leaking into the system.
More Type III questions
- Why must low-pressure chillers be designed to be completely airtight?
- Which HCFO refrigerant is replacing R-123 in new low-pressure chillers?
- Which of the following is considered a low-pressure refrigerant?
- Where is the rupture disc typically located on a low-pressure chiller?
- What is the primary purpose of a purge unit on a low-pressure centrifugal chiller system?
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.