GATE ME 2015 Set 2 — Question 23

MCQ+1 / -0.33EasyRankine, Reheat & RegenerativePower CyclesThermodynamics

Thermodynamics → Power Cycles → Rankine, Reheat & Regenerative

Last updated 5 September 2026

Question

Which of the following statements regarding a Rankine cycle with reheating are TRUE ? (i) increase in average temperature of heat addition (ii) reduction in thermal efficiency (iii) drier steam at the turbine exit

Correct answer(C) only (i) and (iii) are correctSolutionReheating in a Rankine cycle has the following effects:(i) TRUE: It increases the average temperature of heat addition, which generally leads to an increase in thermal efficiency.(ii) FALSE: Reheating is designed to increase thermal efficiency and work output, not reduce it.(iii) TRUE: By reheating the steam after partial expansion, the expansion in the low-pressure turbine ends at a higher dryness fraction, resulting in drier steam at the exit and protecting turbine blades from erosion.Therefore, statements (i) and (iii) are correct.Turn this into a strength.Explore AI-powered practice and doubt support with Success Tracker.

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Correct answer(C) only (i) and (iii) are correctSolutionReheating in a Rankine cycle has the following effects:(i) TRUE: It increases the average temperature of heat addition, which generally leads to an increase in thermal efficiency.(ii) FALSE: Reheating is designed to increase thermal efficiency and work output, not reduce it.(iii) TRUE: By reheating the steam after partial expansion, the expansion in the low-pressure turbine ends at a higher dryness fraction, resulting in drier steam at the exit and protecting turbine blades from erosion.Therefore, statements (i) and (iii) are correct.

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