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Carnot Engine and Efficiency MCQs

Prepare for Carnot Engine and Efficiency MCQs with verified questions, past-paper solutions, and conceptual explanations for CSS, PMS, FPSC, PPSC, and NTS examinations.

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Topic Notes: Carnot Engine and Efficiency

These notes summarize the key preparation context before you attempt the MCQs. Review the topic focus, then practice the questions below with answers and explanations.

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Master Carnot Engine and Efficiency MCQs for Competitive Exams with our comprehensive, verified question bank. Designed for students and competitive exam aspirants across Pakistan, this study resource provides topic-wise practice questions for CSS, PMS, FPSC, PPSC, SPSC, KPPSC, BPSC, NTS, and university entry tests.

Exam Focus
Aligned with FPSC, PPSC, and CSS syllabus criteria for Carnot Engine and Efficiency.
Past Papers
Includes frequently repeated questions from past examinations.
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Preparation Guide & Key Focus Areas for Carnot Engine and Efficiency MCQs

When preparing for Carnot Engine and Efficiency MCQs (Physics), focus on core definitions, historical timelines, relevant provisions, and commonly tested factual points. Review each question below, test your knowledge against the given options, and inspect the detailed explanation to solidify your understanding.

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31
A Carnot engine takes 300 calorie of heat at 500 K and rejects 150 calorie of heat to the sink. The temperature of the sink is
32
A heat engine operating according to second law of thermodynamics rejects one fourth of the heat taken from high temperature reservoir. What is the percentage efficiency of heat engine?
33
A heat engine with 100% efficiency would have to
34
Carnot engine is heat engine.
35
A heat engine is supplied heat at the rate of 30,000 J/s and gives an output of 9 KW. The thermal efficiency of engine is
36
15. A Carnot engine working between 300 K and 600 K has a work output of 800 joule per cycle. The amount of heat energy supplied from the source to the engine in each cycle is
37
Efficiency of an ideal engine can only be 100% when
38
The efficiency of a Carnot engine is 50% and temperature of sink is 500 K. If temperature of source is kept constant and its efficiency is raised to 60%, then the required temperature of the sink will be
39
Two steam engines A and B have their sources at 900 K and 600 K and their sinks are at 450 K and 300 K respectively. They are
40
A heat engine can develop efficiency equal to 100% if the temperature of the sink is