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Heat Engines Questions

Practice 4 Heat Engines questions with detailed answers and explanations. Free MCQs, PYQs, and mock test questions for NEET, JEE, GATE, SSC and more.

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Total Questions
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3
Medium
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Practice by Exam:Physics(4)

About Heat Engines — practice questions, PYQs & concepts

Heat Engines is a frequently-tested topic on Physics. ExamTest.live currently lists 4 Heat Engines questions spanning previous-year papers from 2026 to 2026, each with worked solutions and a step-by-step explanation. Use the filters on this page to focus on a specific exam, difficulty level or year — every answer key is free, no sign-up required.

Heat Engines weight in competitive exams

Across our Heat Engines question bank, the largest sources are Physics (4). Click any exam chip above to drill down to that exam-specific question set.

How to use this page

  • Start easy: 1 easy Heat Engines questions are available — build fluency before moving up.
  • Target weak years: Use the year filter to focus on the most recent 2026 paper or older PYQs you have not attempted.
  • Time yourself: Every question shows the average solve time so you can benchmark your speed against other students.
  • Read every explanation: Even on questions you got right — the explanation often surfaces a faster approach you can reuse.

All Heat Engines Questions(1–4 of 4)

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Q1mediummcqPhysicsNEET 20172026
A Carnot engine having an efficiency of as heat engine, is used as a refrigerator. If the work done on the system is , the amount of energy absorbed from the reservoir at lower temperature is:
Q2mediummcqPhysicsAIEEE2026
A diatomic ideal gas is used in a Carnot engine as the working substance. If during the adiabatic expansion part of the cycle, volume of the gas increases from to , the efficiency of the engine is:
Q3mediummcqPhysicsPhysics
An engine has an efficiency of . When the temperature of the sink is reduced by , its efficiency is doubled. The temperature of the source is:
Q4easymcqPhysicsPhysics
The coefficient of performance of a refrigerator is . If the temperature inside freezer is , the temperature of the surroundings to which it rejects heat is:

Frequently Asked Questions

How many Heat Engines questions are on ExamTest.live?▼
We have 4 Heat Engines questions spread across 1 pages, covering easy, medium, and hard difficulty levels with detailed explanations.
Are Heat Engines MCQs free?▼
Yes. All Heat Engines questions, answers, and explanations on ExamTest.live are completely free. No account or subscription required.
Which exams include Heat Engines questions?▼
Heat Engines questions are commonly asked in Physics. You can filter by exam using the links above.
How do I practice Heat Engines questions effectively?▼
Start with easy questions to build confidence, then tackle medium and hard ones. Use the filter buttons to sort by difficulty. Reveal the answer only after attempting each question, and read the explanation thoroughly.