Solved question paper for EME May-2016 (B-TECH 1st-2nd)

Solved Question Paper

Elements of mechanical engineering May-2016

PTU • B-TECH • Civil Engineering • 1st-2nd • May-2016

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. Define property and mention its main characteristic in relation to a cyclic process.
    Short Answer 2 Marks May-2016 • PTU B-TECH
  2. Define specific heat. Why are there two specific heats for gases?
    Short Answer 2 Marks May-2016 • PTU B-TECH
  3. Name and state the property introduced by the first law of thermodynamics.
    Short Answer 2 Marks May-2016 • PTU B-TECH
  4. Show that the work done in a steady flow process is given by -∫vdp.
    Short Answer 2 Marks May-2016 • PTU B-TECH
  5. Explain the concept of Clausius Inequality.
    Short Answer 2 Marks May-2016 • PTU B-TECH
  6. Comment on the statement, “The entropy of the universe tends to be maximum”.
    Short Answer 2 Marks May-2016 • PTU B-TECH
  7. Define the terms available energy and unavailable energy.
    Short Answer 2 Marks May-2016 • PTU B-TECH
  8. How IC engines are classified?
    Short Answer 2 Marks May-2016 • PTU B-TECH
  9. Give the position of centroid of a triangle and semicircle.
    Short Answer 2 Marks May-2016 • PTU B-TECH
  10. Give composition and uses of high carbon steel and high speed steel.
    Short Answer 2 Marks May-2016 • PTU B-TECH
  11. Set up an expression for the displacement work done during any arbitrary process.
    Long Answer 3 Marks May-2016 • PTU B-TECH
  12. Set up an expression for the displacement work done during any arbitrary process.
    Long Answer 3 Marks May-2016 • PTU B-TECH
  13. Air initially at 75 kPa pressure, 1000 K temperature and occupying a volume of 0.12 m3 is compressed isothermally until the volume is halved and subsequently it undergoes further compression at constant pressure till the volume is halved again. Sketch the process on p-V diagram and make calculations for work done.
    Long Answer 5 Marks May-2016 • PTU B-TECH
  14. A steady flow of water at enthalpy 250 kJ/kg enters a section of the heating plant of building in which there are no pumps. The water leaves the section at enthalpy 200 kJ/kg. The exit pipe is 25 m above the inlet pipe. Neglecting changes in kinetic energy, make calculations for the heat transfer from the water.
    Long Answer 8 Marks May-2016 • PTU B-TECH
  15. Prove that the efficiency of an engine working on a reversible cycle depends only on the temperature of source and sink and is independent of the working fluid.
    Long Answer 4 Marks May-2016 • PTU B-TECH
  16. A reversible heat engine receives heat from two thermal reservoirs at 870 K and 580 K, and rejects 50 kW of heat to a sink at 290 K. If the engine output is 85 kW, make calculations for the engine efficiency and heat supplied by each reservoir.
    Long Answer 4 Marks May-2016 • PTU B-TECH
  17. Show that whenever a system executes a complete cyclic process, ∮δQ/T is less than zero or in the limit is equal to zero. Hence prove that entropy is a property of the system.
    Long Answer 4 Marks May-2016 • PTU B-TECH
  18. A fluid transfers 2000 kJ of heat to the environment at 300 K. If the entropy change of the fluid is -5 kJ/K determine the overall entropy change and comment on the nature of the process whether possible, reversible, irreversible.
    Long Answer 4 Marks May-2016 • PTU B-TECH
  19. Derive an expression for efficiency and mean effective pressure for a Dual cycle.
    Long Answer 8 Marks May-2016 • PTU B-TECH
  20. A vertical cylinder with diameter 30 cm and height 40 cm is topped by a right circular cone of same diameter and height 20 cm. Find the C.G. of the composite body from the apex of the cone.
    Long Answer 8 Marks May-2016 • PTU B-TECH
  21. Differentiate between creep and fatigue.
    Short Answer 2 Marks May-2016 • PTU B-TECH
  22. Differentiate between yield stress and proof stress.
    Short Answer 2 Marks May-2016 • PTU B-TECH
  23. Differentiate between ductile and brittle fracture.
    Short Answer 2 Marks May-2016 • PTU B-TECH
  24. What are the commercial alloys of aluminum? Briefly describe their composition and uses.
    Short Answer 2 Marks May-2016 • PTU B-TECH
  25. A diesel engine operates on the air standard diesel cycle. The engine has six cylinders of 11 cm bore and 13 cm stroke. The engine runs at 2000 rpm. At the beginning of compression the air is at 1 bar and 26°C. If the clearance volume is 12.5 percent of the stroke volume, find the compression ratio.
    Short Answer May-2016 • PTU B-TECH
  26. A diesel engine operates on the air standard diesel cycle. The engine has six cylinders of 11 cm bore and 13 cm stroke. The engine runs at 2000 rpm. At the beginning of compression the air is at 1 bar and 26°C. If the clearance volume is 12.5 percent of the stroke volume, find the pressure and temperature of the air after compression.
    Short Answer May-2016 • PTU B-TECH
  27. A diesel engine operates on the air standard diesel cycle. The engine has six cylinders of 11 cm bore and 13 cm stroke. The engine runs at 2000 rpm. At the beginning of compression the air is at 1 bar and 26°C. If the clearance volume is 12.5 percent of the stroke volume, find the thermal efficiency and power output if the air is heated to 1370°C.
    Short Answer May-2016 • 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.