HVAC · Practice-Exam-2 · Problem 24PDFSolution in PDF ↓
HVAC · Practice-Exam-2 · Problem 24
Problem & Solution
Video Synthesis
Problem: Outside air conditions are 85 degrees and 50% relative humidity.
Approach: So we want to remember here that partial pressure of water vapor depends on relative humidity and we can actually use the definition of relative humid...
Key step: And we find out that the partial pressure is 0.6 psi a.
Watch out: If you say vapor pressure, it's not obvious that we're talking about water unless you have experience discussing and solving these kinds of problems.
Result: And that equals 0.3 psi a.
✅ Answer: A
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Student questions asked in live office hours about this problem
OH 112: HVAC: Full Practice Exam #24
Q: I got the same answer, but in a different way from the solution video, is it a valid way to solve the problem? Or did I just get lucky?
A: Yeah, I took a look through this and it's spot on. I'm not going to go through all the detail here, but your reasoning is perfectly valid in the way you went about it. And I have no qualms with this at all.