TFS · Practice Exam 1 · Problem 20 PDF Solution in PDF ↓
TFS · Practice Exam 1 · Problem 20
Problem & Solution
PDF: Practice Exam #1-20.pdf
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  • - Problem: What is the thermal efficiency of a reversible heat engine operating between a cold and hot reservoir with temperatures of 100 degrees and 500 degrees respectively?
  • - Approach: For a cycle to be reversible, it's assumed to be 100% efficient because otherwise how it would be reversible.
  • - Key values: 100 %, 42 %
  • - Result: And that gives us an efficiency of 42% which is answer choice A.
  • - ✅ Answer: A
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MPEP OH Prep Dashboard Problem 20 · Practice Exam 1 PDF-Embedded Format