EPA 608 Type III · Leak Detection · Medium
What indicates a tube leak in a low-pressure centrifugal chiller?
Answer: C. Excessive moisture in the purge unit.
- AFrost on the evaporator shell.
- BHigh oil pressure.
- CExcessive moisture in the purge unit.✓ Correct
- DA sudden drop in water temperature.
Why C is right
If a tube leaks, water enters the refrigerant side and is collected by the purge unit.
More Type III questions
- How do you find a leak in the water tubes of a low-pressure chiller?
- What is the maximum safe test pressure for a low-pressure centrifugal chiller?
- What is the recommended method to leak-test a low-pressure chiller without exceeding rupture disc limits?
- Why must evaporator and condenser water pumps run when recovering refrigerant from a low-pressure chiller?
- What is the most efficient way to begin recovering refrigerant from a low-pressure chiller?
Go deeper with the study guide AIM Act 2026: The HFC Leak Repair Rules for HVAC Techs, 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.