A claim that an engine working between 400 K and 300 K has 40% efficiency is:

  1. below the limit
  2. possible
  3. exactly the Carnot value
  4. impossible — the maximum is 25%
Answer

D) impossible — the maximum is 25%

1 - 300/400 = 0.25. SLO P-11-C-23 · Knowledge

Physics MCQ · More Heat Engines, Second Law and Entropy MCQs · Practise