Solved question paper for EME May-2010 (B-TECH 1st-2nd)

Solved Question Paper

Elements of mechanical engineering May-2010

PTU • B-TECH • Mechanical Engineering • 1st-2nd • May-2010

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 enthalpy of the system. How is it related to internal energy?
    Short Answer 2 Marks May-2010 • PTU B-TECH
  2. Define compression ratio.
    Short Answer 2 Marks May-2010 • PTU B-TECH
  3. Is it possible that W ≠ 0 even if dV = 0? If so, give an example.
    Short Answer 2 Marks May-2010 • PTU B-TECH
  4. What is entropy principle?
    Short Answer 2 Marks May-2010 • PTU B-TECH
  5. Draw P-V and T-S diagrams for Brayton cycle.
    Short Answer 2 Marks May-2010 • PTU B-TECH
  6. What is PMM1?
    Short Answer 2 Marks May-2010 • PTU B-TECH
  7. Give the relation between COP of heat pump and refrigerator.
    Short Answer 2 Marks May-2010 • PTU B-TECH
  8. Differentiate between machine and mechanism.
    Short Answer 2 Marks May-2010 • PTU B-TECH
  9. State the uses of Oldham coupling.
    Short Answer 2 Marks May-2010 • PTU B-TECH
  10. Define temperature stresses and strains.
    Short Answer 2 Marks May-2010 • PTU B-TECH
  11. Differentiate between temperature, heat and internal energy.
    Short Answer May-2010 • PTU B-TECH
  12. A non-flow reversible process occurs for which pressure and volume are correlated by the expression P = (V + 5/V), where P is in bar and V is in m3. What amount of work will be done when volume changes from 3 to 6 m3?
    Long Answer May-2010 • PTU B-TECH
  13. What is throttling process? Point out its salient aspects.
    Short Answer May-2010 • PTU B-TECH
  14. The centrifugal pump delivers 50 kg of water per second. The inlet and outlet pressures are 1 bar and 4.2 bar respectively. The suction is 2.2 m below the centre of the pump and delivery is 8.5 m above the centre of the pump. The suction and delivery pipe diameters are 20 cm and 10 cm respectively. Determine the capacity of the electric motor to run the pump.
    Long Answer May-2010 • PTU B-TECH
  15. Draw P-V diagram for isobaric, isochoric and isothermal process.
    Short Answer May-2010 • PTU B-TECH
  16. 0.2 m3 of an ideal gas at a pressure of 2 MPa and 600 K is expanded isothermally to 5 times the initial volume. It is then cooled to 300 K at constant volume and then compressed back polytropically to its initial state. Determine the net work done and heat transfer during the cycle.
    Long Answer May-2010 • PTU B-TECH
  17. Explain the working principle of dual cycle with the help of P-V and T-S diagrams. Derive an expression for the air standard efficiency of the dual cycle in terms of the compression ratio, pressure ratio, cut off ratio and the adiabatic index.
    Long Answer May-2010 • PTU B-TECH
  18. State Kelvin-Planck and Clausius statements of second law of thermodynamics. Explain the equivalence of Kelvin-Planck and Clausius statements.
    Long Answer May-2010 • PTU B-TECH
  19. Explain the working of elliptical trammel.
    Short Answer May-2010 • PTU B-TECH
  20. A machine raised a load of 300 N through a distance of 300 mm. The effort of 50 N moved 2.7 m during the process. Determine (i) Mechanical advantage. (ii) Velocity ratio. (iii) Efficiency. (iv) Effect of friction.
    Long Answer May-2010 • PTU B-TECH
  21. Derive the relation between Bulk modulus (K), Young's modulus (E) and Poisson's ratio (1/m).
    Long Answer May-2010 • PTU B-TECH
  22. In order to evaluate various mechanical properties, a steel specimen of 20 mm diameter and 20 cm length was tested in a standard tension test and data collected are: yield load = 150 kN; maximum load = 225 kN; fracture load = 175 kN; gauge length at fracture = 25 cm; extension at load of 30 kN = 0.08 mm. Determine (i) Yield point stress. (ii) Ultimate tensile stress. (iii) Percentage elongation. (iv) Modulus of elasticity. (v) Breaking strength.
    Long Answer May-2010 • PTU B-TECH
  23. Write short notes on reversible processes.
    Short Answer May-2010 • PTU B-TECH
  24. Write short notes on Carnot cycle.
    Short Answer May-2010 • PTU B-TECH
  25. Write short notes on creep.
    Short Answer May-2010 • PTU B-TECH
  26. Write short notes on working of four stroke diesel engine.
    Short Answer May-2010 • 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.