EPA 608 Core · Dehydration & Evacuation · Medium
What happens to the boiling point of water as system pressure drops in a vacuum?
Answer: D. It drops, so water boils at room temperature.
- AIt rises, so water needs more heat to boil.
- BIt remains exactly 212 degrees F.
- CWater can't boil at all inside a vacuum.
- DIt drops, so water boils at room temperature.✓ Correct
Why D is right
Lowering the pressure lowers the boiling point, forcing trapped liquid water to turn into vapor.
More Core questions
- If a micron gauge rises to atmospheric pressure after the pump is off, what does it mean?
- If a micron gauge rises and then levels off (e.g., at 2000 microns), what does it mean?
- 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?
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.