EPA 608 Core · Dehydration & Evacuation · Hard
If a micron gauge rises and then levels off (e.g., at 2000 microns), what does it mean?
Answer: D. There is still moisture trapped in the system.
- AThere is a large leak to the atmosphere.
- BThe micron gauge sensor is faulty.
- CThe vacuum pump is oversized for the job.
- DThere is still moisture trapped in the system.✓ Correct
Why D is right
A stabilization mid-way means liquid moisture is still boiling off and turning into vapor.
More Core questions
- What is the primary purpose of evacuating a refrigeration system?
- What chemical is formed when moisture mixes with CFC or HCFC refrigerants?
- What tool is required to accurately measure a deep vacuum?
- What is the standard target vacuum level for system dehydration?
- What happens to the boiling point of water as system pressure drops in a vacuum?
Go deeper with the study guide EPA 608 Evacuation Levels: The Required Vacuum by Appliance, 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.