EPA 608 Type III · Recharging Techniques · Hard
Before charging liquid into a chiller, what must the system pressure be?
Answer: D. Above the saturation pressure at 32°F.
- AExactly 0 psig.
- BAt a deep vacuum of 500 microns.
- CEqual to the ambient atmospheric pressure.
- DAbove the saturation pressure at 32°F.✓ Correct
Why D is right
The pressure must correspond to a saturation temperature above 32F (0C) so the liquid doesn't freeze the tubes.
More Type III questions
- Why is a low-pressure chiller introduced with refrigerant vapor before liquid refrigerant during the charging process?
- Why must low-pressure chillers be designed to be completely airtight?
- R-123 is rated B1 under ASHRAE 34. What does that mean?
- Which HCFO refrigerant is replacing R-123 in new low-pressure chillers?
- A chiller with a 1,000-lb full charge needs 50 lbs added, 73 days after the last addition. What is its annualized leak rate?
Go deeper with the study guide A2L Refrigerants and the R-410A Transition: A Tech’s Guide, 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.