Solved question paper for EME May-2023 (B-TECH 1st-2nd)

Solved Question Paper

Elements of mechanical engineering May-2023

PTU • B-TECH • Mechanical Engineering • 1st-2nd • May-2023

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. Locate the centroid of a trapezium with the base b and the parallel side's h1 and h2.
    Long Answer 8 Marks May-2023 • PTU B-TECH
  2. Discuss the following properties of the materials: d) Brittleness
    Long Answer 8 Marks May-2023 • PTU B-TECH
  3. Discuss the following properties of the materials: c) Machinability
    Long Answer 8 Marks May-2023 • PTU B-TECH
  4. Discuss the following properties of the materials: b) Toughness
    Long Answer 8 Marks May-2023 • PTU B-TECH
  5. Discuss the following properties of the materials: a) Elasticity
    Long Answer 8 Marks May-2023 • PTU B-TECH
  6. Derive the expression for the efficiency of the following cycles: b) Duel Cycle
    Long Answer 8 Marks May-2023 • PTU B-TECH
  7. Derive the expression for the efficiency of the following cycles: a) Diesel cycle
    Long Answer 8 Marks May-2023 • PTU B-TECH
  8. An engine working on otto-cycle has a volume of 0.45m^3, pressure 1 bar and temperature 30°C at the beginning of compression stroke. At the end of compression stroke, the pressure is 11 bar. 210kJ of heat is added at constant volume. Determine: f) Ideal power developed by the engine if the number of working cycles per minute is 210. Assume the cycle id reversible.
    Long Answer 8 Marks May-2023 • PTU B-TECH
  9. An engine working on otto-cycle has a volume of 0.45m^3, pressure 1 bar and temperature 30°C at the beginning of compression stroke. At the end of compression stroke, the pressure is 11 bar. 210kJ of heat is added at constant volume. Determine: e) Mean effective pressure
    Long Answer 8 Marks May-2023 • PTU B-TECH
  10. An engine working on otto-cycle has a volume of 0.45m^3, pressure 1 bar and temperature 30°C at the beginning of compression stroke. At the end of compression stroke, the pressure is 11 bar. 210kJ of heat is added at constant volume. Determine: d) Network per cycle
    Long Answer 8 Marks May-2023 • PTU B-TECH
  11. An engine working on otto-cycle has a volume of 0.45m^3, pressure 1 bar and temperature 30°C at the beginning of compression stroke. At the end of compression stroke, the pressure is 11 bar. 210kJ of heat is added at constant volume. Determine: c) Efficiency
    Long Answer 8 Marks May-2023 • PTU B-TECH
  12. An engine working on otto-cycle has a volume of 0.45m^3, pressure 1 bar and temperature 30°C at the beginning of compression stroke. At the end of compression stroke, the pressure is 11 bar. 210kJ of heat is added at constant volume. Determine: b) Percentage clearance
    Long Answer 8 Marks May-2023 • PTU B-TECH
  13. An engine working on otto-cycle has a volume of 0.45m^3, pressure 1 bar and temperature 30°C at the beginning of compression stroke. At the end of compression stroke, the pressure is 11 bar. 210kJ of heat is added at constant volume. Determine: a) Pressure, temperature and volume at a salient point in the cycle
    Long Answer 8 Marks May-2023 • PTU B-TECH
  14. The heat capacity of a system at constant volume is given by CV = ZT^2, where Z = 0.045J/K^3. A system is originally at 250K, and a thermal reservoir at 125K is available. Determine the maximum amount of work that can be recovered as the system is cooled down to the temperature of the reservoir.
    Long Answer 8 Marks May-2023 • PTU B-TECH
  15. Write down the general energy equations for steady flow system and simplify when applied to the following: b) Steam turbine
    Long Answer 8 Marks May-2023 • PTU B-TECH
  16. Write down the general energy equations for steady flow system and simplify when applied to the following: a) Reciprocating air compressor
    Long Answer 8 Marks May-2023 • PTU B-TECH
  17. 0.15m3 of an ideal gas at a pressure of 15 bar and 550K is expanded isothermally to 4 times the initial volume. It is then cooled at 290K at constant volume and then compressed back polytropically to its initial state. Calculate the net work done and heat transferred during the cycle.
    Long Answer 8 Marks May-2023 • PTU B-TECH
  18. A fluid at a pressure of 3bar, and with specific volume of 0.18m3/kg, contained in a cylinder behind a piston expands reversibly to a pressure of 0.6 bar according to law, p = C/V^2, where C is constant. Calculate the work done by the fluid on the piston.
    Long Answer 8 Marks May-2023 • PTU B-TECH
  19. 1(j) How the composites are different from conventional materials.
    Very Short Answer 2 Marks May-2023 • PTU B-TECH
  20. 1(i) Draw (only) and list stress stain diagram of ductile materials.
    Very Short Answer 2 Marks May-2023 • PTU B-TECH
  21. 1(h) Define the term true stress.
    Very Short Answer 2 Marks May-2023 • PTU B-TECH
  22. 1(g) Define the term availability.
    Very Short Answer 2 Marks May-2023 • PTU B-TECH
  23. 1(f) Explain the first law of thermodynamics with respect to close systems.
    Very Short Answer 2 Marks May-2023 • PTU B-TECH
  24. 1(e) What do you mean by PMM of the second kind?
    Very Short Answer 2 Marks May-2023 • PTU B-TECH
  25. 1(d) Explain the term dryness fraction of steam.
    Very Short Answer 2 Marks May-2023 • PTU B-TECH
  26. 1(c) Explain the term latent heat of steam.
    Very Short Answer 2 Marks May-2023 • PTU B-TECH
  27. 1(b) What is a pure substance?
    Very Short Answer 2 Marks May-2023 • PTU B-TECH
  28. 1(a) What is a quasi-static process?
    Very Short Answer 2 Marks May-2023 • 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.