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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.

Quick Overview

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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21
Efficiency of a heat engine increases if:
22
A Carnot engine can be 100% efficient, if its sink is at
23
If temperature of the sink is decreased, the efficiency of a Carnot engine
24
The efficiency of a diesel engine is about
25
If the temperature of the source is increased, the efficiency of Carnot engine
26
If a turbine is working as a heat engine and takes heat from a hot body (427°C) and exhausts into a body at 77°C then what is the possible efficiency?
27
An ideal gas heat engine operates in Carnot's cycle between 227°C and 127°C. It absorbs 6 × 10⁴ cal at the higher temperature. The amount of heat converted into work is equal to
28
Carnot's engine works first between 200°C and 0°C and then between 0°C and −200°C. The ratio of its efficiency in these two cases is
29
If the temperature difference of two reservoirs is ______, the efficiency of a heat engine is ______.
30
The efficiency of Carnot Engine is 0.6. It rejects 20 J of heat to the sink. The work done by the engine is