A manufacturer asserts that a heat engine can produce 20 horsepower by absorbing 400 kcal/min of heat while operating between temperatures of 227°C and 27°C. Is this claim feasible?

Thermodynamics MCQs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

PPSCFPSCNTSPakistan govt jobs
Subject
Thermodynamicsmechanical-engineering-mcqs › thermodynamics
Published
26 Jan 2019
Last updated
28 May 2026

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Explanation

The claim is impossible because the proposed power output exceeds the maximum efficiency limits set by the temperature difference and heat input. According to thermodynamic principles, such performance cannot be realized under the given conditions.

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