Solved question paper for EME Dec-2018 (B-TECH 1st-2nd)

Solved Question Paper

Elements of mechanical engineering Dec-2018

PTU • B-TECH • Mechanical Engineering • 1st-2nd • Dec-2018

elements of mechanical engineering previous year question papers on BRpaper are organized for students of Punjab Technical University’s Bachelor of Technology program, 1st-2nd semester. This section makes it easier to browse subject-wise old question papers for elements of mechanical engineering, so students can review how questions are typically framed in past exams and get a sense of the exam pattern. Many students search for elements of mechanical engineering question bank while preparing for exams, and this page is built to support exactly that kind of subject-wise browsing and revision. BRpaper is not the official website of Punjab Technical University or any institution, and it does not publish official notices or academic updates.

Solved Questions

Solved
  1. What do you understand by the term phase as applied to a system?
    Short Answer 2 Marks Dec-2018 • PTU B-TECH
  2. State the conditions for a process to be reversible.
    Short Answer 2 Marks Dec-2018 • PTU B-TECH
  3. Define zeroth law of thermodynamics.
    Short Answer 2 Marks Dec-2018 • PTU B-TECH
  4. What is mechanical equivalent of heat?
    Short Answer 2 Marks Dec-2018 • PTU B-TECH
  5. What is a heat pump? How is it different from a refrigerator?
    Short Answer 2 Marks Dec-2018 • PTU B-TECH
  6. Name the four processes that make up the ideal Diesel cycle.
    Short Answer 2 Marks Dec-2018 • PTU B-TECH
  7. What do you understand by resilience of a material?
    Short Answer 2 Marks Dec-2018 • PTU B-TECH
  8. What is ceramics?
    Short Answer 2 Marks Dec-2018 • PTU B-TECH
  9. Define radius of gyration.
    Short Answer 2 Marks Dec-2018 • PTU B-TECH
  10. State the perpendicular axes theorem.
    Short Answer 2 Marks Dec-2018 • PTU B-TECH
  11. A non-flow reversible process occurs for which pressure and volume are correlated by the expression pV = 150, where V is the volume in m3 and p is the pressure in bar. Calculate the work done on or by the system as pressure increases from 10 bar to 100 bar. Indicate the nature of process, whether expansion or compression.
    Long Answer 8 Marks Dec-2018 • PTU B-TECH
  12. It is desired to compress 10 Kg of gas from 1.5 m3 to 0.3 m3 at a constant pressure of 15 bar. During this compression process, the temperature rises from 20°C to 150°C and the increase in internal energy is 3250 kJ. Calculate the work done, heat interaction and change in enthalpy during the process. Also find out the average value of specific heat at constant pressure.
    Long Answer 8 Marks Dec-2018 • PTU B-TECH
  13. Air enters an adiabatic nozzle steadily at 500 kPa, 200°C and 30 m/sec and leaves at 100 kPa and 180 m/sec. If the inlet area is 0.012 m2, find the mass flow rate through the nozzle, exit temperature of air and exit area of the nozzle. Take R = 0.287 kJ/KgK and γ = 1.4.
    Long Answer 8 Marks Dec-2018 • PTU B-TECH
  14. Explain the Carnot cycle. What are the main conclusions that can be drawn from the efficiency of Carnot cycle.
    Long Answer 8 Marks Dec-2018 • PTU B-TECH
  15. Derive an expression for the air standard thermal efficiency of Otto cycle.
    Long Answer 8 Marks Dec-2018 • PTU B-TECH
  16. Explain the working of a two-stroke petrol engine with the help of neat sketches. What are the demerits of two-stroke engines?
    Long Answer 8 Marks Dec-2018 • PTU B-TECH
  17. What are smart materials? Explain the theory behind shape memory alloys and give the composition and applications of some commercially available shape memory alloys.
    Long Answer 8 Marks Dec-2018 • PTU B-TECH
  18. Find the moment of inertia about the centroid axis XX for the lamina shown below.
    Long Answer 8 Marks Dec-2018 • PTU B-TECH

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01 Where can I find elements of mechanical engineering previous year question papers for Bachelor of Technology, 1st-2nd semester?

This page lists elements of mechanical engineering question papers uploaded for Punjab Technical University Bachelor of Technology, 1st-2nd semester, organized for subject-wise browsing where available.

02 Are these official Punjab Technical University question papers?

BRpaper is not the official website of Punjab Technical University. These papers are shared for reference and revision purposes only and are not official university material.

03 How can previous year elements of mechanical engineering papers help in exam preparation?

Reviewing past papers can help you understand how questions are typically framed, notice commonly repeated topics, and get a sense of the exam pattern before your own exam.

04 What kind of topics does elements of mechanical engineering usually cover?

The question papers here relate to the official elements of mechanical engineering syllabus set by the university for this course and semester.

05 Does this page include a elements of mechanical engineering question bank or solved answers?

This page focuses on providing access to the previous year question papers themselves. A separate question bank or solved answers may not be available for every paper.

06 Can I find papers for other subjects in the same Bachelor of Technology?

Yes, BRpaper organizes papers by university, course, stream, and semester, so you can browse other subjects within the same Punjab Technical University Bachelor of Technology.