Topic: Thermodynamics
Which of the following is most appropriate for vapour power cycles?
- A. In Carnot cycle, expansion of vapour occurs without change in entropy
- B. In Rankine cycle, transformation of liquid water in steam generator occurs at constant temperature
- C. In Carnot cycle heating of vapor occurs at constant volume
- D. In Rankine cycle, entropy of vapor increases during its expansion in steam turbine
Answer: A. In Carnot cycle, expansion of vapour occurs without change in entropy
Explanation: The expansion and compression processes in a Carnot cycle are isentropic (constant entropy). The other statements are incorrect descriptions of Rankine and Carnot cycles.