If your IGNOU BSCAEY Term End exam is scheduled for 2026 or later, the BEY 001 Question Paper December 2025 is one of the most useful study tools you can rely on. This is the actual paper conducted by IGNOU in December 2025, which means the question style, numerical pattern and topic weightage match what you will see in your own exam. Our solved version gives you clarity on both theory and calculation based questions in one focused PDF.
About This Solved Paper
| Prepared by | Unnati Education, IGNOU-experienced academic content writer |
|---|---|
| Subject expert qualification | Graduate team with specialisation in Thermal Engineering and Energy Systems |
| Programme | IGNOU Bachelor of Science Applied Science Energy (BSCAEY) |
| Institution Reference | IGNOU December 2025 Term-End Examination |
You can download the BEY 001 Solved Question Paper December 2025 directly from this page as a clean PDF file. It opens on any mobile or laptop, which is useful if you need to revise numericals during commute, between classes or before entering the exam hall. Most BSCAEY students notice that practicing the actual paper with worked out steps is far more productive than reading theory units alone.
What is BEY 001 Question Paper December 2025 Definition
The BEY-001 December 2025 question paper is the official IGNOU Term End Examination paper for Thermal Science, conducted in December 2025 for BSCAEY students. It carries 70 marks, runs for three hours, and asks you to attempt any seven questions of equal marks with permission to use a scientific calculator.
The paper tests your grip on thermodynamics as a subject. You are expected to handle definitions, derivations, numericals and diagrams. Questions move from basic concepts, like system and control volume, to applied systems, like boilers, Rankine cycle, IC engines and vapour compression refrigeration, so a balanced preparation is important.
About IGNOU BEY-001 Thermal Science
BEY 001 is a core paper in the IGNOU BSCAEY programme. It introduces you to classical thermodynamics and its applications in the energy sector. The course covers laws of thermodynamics, processes and cycles, ideal and real gas behaviour, Carnot and Rankine cycles, steam generators and boiler mountings, heat transfer modes including conduction, and practical systems like IC engines and refrigeration. Students who practice numericals alongside derivations tend to score noticeably higher in the final Term End evaluation.
BEY 001 Question Paper December 2025 Exam Pattern and Marks Breakdown (BEY-001 December 2025 Question Paper)
The paper runs for 3 hours and carries 70 marks in total. There are nine questions, and you are required to attempt any seven of them. All questions carry equal marks, which means each question is worth 10 marks. The paper does not have separate sections. Use of a scientific calculator is permitted, and you are allowed to assume suitable missing data where needed. Smart selection of questions matters, especially between numericals and theory based answers.
All Questions BEY 001 Question Paper December 2025 IGNOU (Complete List)
Below is the full paper exactly as it appeared in the IGNOU Term End Examination December 2025. The attached PDF shows the original paper with proper engineering formatting.
Note: Answer any seven questions. All questions carry equal marks. Use of scientific calculator is permitted. Assume suitable data, if missing.
Question 1 (10 marks)
What are System, Surrounding and Control Volume? Differentiate between 'System' and 'Control Volume'.
Question 2 (10 marks)
(a) Explain the difference between 'Process' and 'Path' with neat sketches. (5)
(b) Describe and explain a 'Thermal Cycle'. (5)
Question 3 (10 marks)
60 litres of air at 70°C expands from 7 bar to 1.05 bar according to the law PVn = C. The volume of air after expansion is 300 litres. Determine the mass of air and the work done during the process.
Question 4 (10 marks)
(a) Explain in brief term 'Reversible Engine'. (5)
(b) Explain and show the various processes in a Carnot cycle using a P-V diagram. (5)
Question 5 (10 marks)
What are boiler mountings? Name a few of them and discuss any two of them in detail.
Question 6 (10 marks)
What is Rankine cycle? Discuss the process of 'Regeneration' and 'Reheating' in a Rankine cycle.
Question 7 (10 marks)
Derive the General Heat Conduction Equation using Cartesian co-ordinates and assuming heat flow through a small cuboidal element.
Question 8 (10 marks)
Discuss in detail the differences between a 'two-stroke' and a 'four-stroke' engine using neat sketches.
Question 9 (10 marks)
Describe the construction and working of a vapour compression refrigeration system with the help of a neat diagram.
BEY 001 Question Paper December 2025 Syllabus Topics Covered
The paper maps cleanly to the BEY 001 syllabus. You see thermodynamics fundamentals, including system, surrounding, control volume, process, path and thermal cycles. Gas law based expansion problems test the PVn law directly. Carnot cycle and reversible engines are covered on the conceptual side. Applied topics include boiler mountings, Rankine cycle with regeneration and reheating, and the general heat conduction equation in Cartesian form. The paper also covers IC engines, with two stroke and four stroke comparison, and vapour compression refrigeration systems.
Sample Answer Preview BEY-001 Thermal Science Solved Question Paper Explanation
Take Question 3 on polytropic expansion. A weak answer jumps to the formula without setting units. A scoring answer first converts temperature to Kelvin, 343 K, and volume to cubic metres. Then it calculates mass using PV equals mRT with R for air as 287 J per kg K. Next, it finds the polytropic index n from the P1V1^n equals P2V2^n relation, and finally computes work done using the standard polytropic work equation. Our solved paper writes every step clearly.
How to Write High-Scoring Answers in BEY 001 Question Paper December 2025
Start each 10 mark answer with a short definition or opening paragraph. For numericals, always write given data, required quantity, formula, substitution, answer and unit, in that order, because IGNOU awards marks for method. For theory, use labelled sketches, especially for process and path, Carnot P V diagram, two stroke versus four stroke engines, and vapour compression refrigeration. Add one real example wherever possible, like Indian thermal power plants for Rankine cycle. Keep handwriting neat, use proper margins, and avoid long repetitive paragraphs.
Who Should Use This BEY-001 Solved Question Paper December 2025?
This solved paper is made for IGNOU BSCAEY students appearing in June 2026, December 2026 or later Term End cycles. It also helps reappear candidates, backlog students clearing BEY 001, and working professionals from power plants, HVAC, oil and gas, and renewable energy companies who have enrolled in BSCAEY as a career skill. If you are balancing shift duty, family and studies, this paper gives you a focused, time saving way to revise without reopening every unit of the course.
Why This is Better Than Free BEY-001 December 2025 Question Paper PDFs and Telegram Files
Free PDFs on Telegram and random blog sites often have wrong numerical answers, missing units, or theory that does not match IGNOU BSCAEY style. Some files skip the heat conduction derivation entirely. Others give two lines for a 10 mark numerical, which will clearly not score. Our solved paper is written by a subject expert, checked against the official December 2025 paper, and formatted in proper engineering answer style. You save preparation time, protect your marks, and revise with real confidence.
Student Reviews BEY-001 Solved Question Paper by Unnati Education
Vishal from Bhilai, working in a thermal power plant, said the Rankine cycle answer finally connected regeneration and reheating to what he sees on the plant floor. Neha from Vadodara told us the polytropic process numerical was solved exactly how her tutor recommended, step by step with units. Saurabh, a first time BSCAEY learner from Dehradun, wrote that the two stroke versus four stroke answer with sketches was the clearest explanation he had read online during his preparation.
How to Get the BEY-001 Solved Question Paper December 2025 Step by Step
First, click the download button at the top of this page. Second, complete the quick checkout, it takes less than a minute. Third, the solved PDF reaches your email instantly, and it is also saved inside your Unnati Education account dashboard. Fourth, open it on phone or laptop and revise question by question. If you face any trouble with download or payment, our support team replies quickly on WhatsApp and email.
Frequently Asked Questions BEY 001 Question Paper December 2025 IGNOU
Is this the official IGNOU BEY 001 December 2025 paper?
Yes, this is the actual Term End Examination paper conducted by IGNOU in December 2025 for BEY 001 under the Bachelor of Science Applied Science Energy BSCAEY programme. Every question on this page is reproduced exactly as it appeared in the official paper, which makes it a reliable source for your 2026 exam preparation and for any future Term End attempt you may plan later.
Will this paper help me for my 2026 exam?
It will help you strongly. IGNOU often repeats question themes in BEY 001, especially on Carnot cycle, Rankine cycle, heat conduction derivation, IC engines and refrigeration systems. By practicing the December 2025 paper with solved answers, you understand the examiner style, the expected length for a 10 mark question, and how to structure both theory answers and numericals for full marks in your Term End exam.
Are numerical problems fully solved with steps?
Yes. Numerical questions, like Question 3 on polytropic gas expansion, are solved completely. We first list the given data, then convert units to SI, write the relevant formula, substitute values carefully, and finish with the final answer in correct units. Every step is explained in plain language, so even if thermodynamics numericals feel heavy at first, you can follow the method and apply it to similar problems confidently during your own exam.
Can I use this for my BEY 001 assignment too?
You can use it as a strong reference while writing your BEY 001 assignment, especially on topics like Carnot cycle, Rankine cycle, boiler mountings, IC engines and refrigeration. We recommend you rewrite the ideas and redo the calculations in your own style, because IGNOU checks BSCAEY assignments for originality. Treat this solved paper as a study guide and a model answer set, not a direct copy source for your final assignment submission.
Is the download instant after payment?
Yes, delivery is instant. Once your payment is confirmed, the BEY 001 solved question paper PDF is sent to your registered email and also saved inside your Unnati Education account dashboard. You can open it on mobile, tablet or laptop, and there is no limit on how many times you download, print or revise the paper during your BSCAEY preparation journey in any upcoming Term End exam cycle.
About Unnati Education IGNOU Study Material Experts
Unnati Education is an academic resource platform built for IGNOU students across India. Our team includes graduates, postgraduates, engineers and subject mentors who have personally handled IGNOU coursework. We prepare solved question papers, handwritten assignments and revision notes in student friendly language. Our focus is simple, we want you to stop depending on unreliable free files and start preparing with material you can actually trust during your exam cycle.
Explore More IGNOU BEY-001 Solved Papers and Study Material
You can also explore BEY 001 solved assignments, previous year question papers from June and December cycles, important questions lists, and short revision notes on our website. Together, these resources give you a complete preparation package for Thermal Science, from the first reading of the course to your final revision the night before your IGNOU BSCAEY Term End examination.