Question

What is the Carnot Cycle Efficiency?

(a) η = 1- QC/QH

(b) η = QC/QH

(c) η = QC/QH -1

(d) η = QH/QC

I got this question in class test.

Question is taken from I.C Engine in section Internal Combustion Engine of Farm Machinery

Answer 1

The correct option is (a) η = 1- QC/QH

Best explanation: Since energy is conserved according to the first law of thermodynamics and energy cannot be converted to work completely, the heat input, QH, must be equal to the work done, W, plus the heat that must be dissipated as waste heat QC, into the environment.