Solved question paper for EME Dec-2005 (B-TECH 1st-2nd)

Solved Question Paper

Elements of mechanical engineering Dec-2005

PTU • B-TECH • Civil Engineering • 1st-2nd • Dec-2005

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. State the Zeroth law of Thermodynamics.
    Short Answer Dec-2005 • PTU B-TECH
  2. Discuss whether (Pdv + Vdp) represent the system properties or not?
    Short Answer Dec-2005 • PTU B-TECH
  3. How enthalpy is related to the internal energy?
    Short Answer Dec-2005 • PTU B-TECH
  4. State the principle of entropy, draw T-S diagram for it.
    Long Answer Dec-2005 • PTU B-TECH
  5. A close system contains air at 1 bar, 190 K and occupies 0.02 m^3 of volume. This system is heated at constant volume till pressure become 4 bar. Draw P-V and T-S diagram only for the problem.
    Short Answer Dec-2005 • PTU B-TECH
  6. Draw P-V and T-S diagram for an engine operated by Dual cycle.
    Short Answer Dec-2005 • PTU B-TECH
  7. State the condition of reversibility of lifting machine.
    Short Answer Dec-2005 • PTU B-TECH
  8. Draw a stress-strain curve for a mild steel specimen.
    Short Answer Dec-2005 • PTU B-TECH
  9. What is fatigue, define?
    Short Answer Dec-2005 • PTU B-TECH
  10. Which of the following material has the maximum ductility?
    MCQ Dec-2005 • PTU B-TECH
  11. State the condition for a process to be reversible.
    Short Answer Dec-2005 • PTU B-TECH
  12. Classify the thermodynamic system and explain them with the help of simple diagrams.
    Long Answer Dec-2005 • PTU B-TECH
  13. A non flow reversible process occurs for which pressure and volume are correlated by the expression P=(V^2 + 6V), where P is in bar and V is m^3. What amount of work will be done when volume changes from 2 to 4 m^3?
    Long Answer Dec-2005 • PTU B-TECH
  14. Explain the corollaries of first law.
    Long Answer Dec-2005 • PTU B-TECH
  15. A close system having a mass of 50 Kg has an initial velocity of 10 m/s. Subsequently its velocity increases to 30 m/s and its elevation also rises by 40 m. During this process the system receives 30000 J of heat and 4500 J of work. If the system delivers 0.002 KWh of electrical energy, determine the change in internal energy of the system.
    Long Answer Dec-2005 • PTU B-TECH
  16. Differentiate between different polytropic process, draw common P-V diagram showing expression follow the law PV^n=C for n=0, n=1, n=n.
    Long Answer Dec-2005 • PTU B-TECH
  17. 3 Kg of air kept at an absolute pressure of 100 Kpa and temperature of 300 K is compressed polytropically until the pressure and temperature becomes 1500 KPa and 500 K respectively. Evaluate the polytropic exponent, the final volume and the work of compression. Take gas constant, R=287 J/Kg K.
    Long Answer Dec-2005 • PTU B-TECH
  18. Explain revised heat engine Carnot cycle with the help of P-V diagram.
    Long Answer Dec-2005 • PTU B-TECH
  19. Three real heat engines have the same thermal efficiency and are connected in series. The first engine absorbs 2400 KJ of heat from a thermal reservoir at 1250 K and the third engine rejects its waste of 300 KJ to a sink at 150 K, determine the work output from each engine.
    Long Answer Dec-2005 • PTU B-TECH
  20. Explain the working principle of an air standard cycle with the help of P-V and T-S diagram.
    Long Answer Dec-2005 • PTU B-TECH
  21. A four stroke engine working on diesel cycle has a piston diameter 25 cm, stroke of 40 cm and clearance volume of 1200 cc. The fuel injection takes place for 5% of stroke. If the induction pressure corresponding to 1 bar and engine turns 5 rev/s, find the air standard efficiency of the engine and power developed.
    Long Answer Dec-2005 • PTU B-TECH
  22. Define input, output and efficiency of a simple lofting machine.
    Short Answer Dec-2005 • PTU B-TECH
  23. A simple lifting machine raised a load of 360 N through a distance of 200 mm. The effort a force of 60 N is moved 1.8 m during the process. Calculate velocity ratio, mechanical advantage and efficiency of the machine.
    Long Answer Dec-2005 • PTU B-TECH
  24. Torsion and bending
    Very Short Answer Dec-2005 • PTU B-TECH
  25. Stress and strain
    Very Short Answer Dec-2005 • PTU B-TECH
  26. Sudden and impact load
    Very Short Answer Dec-2005 • PTU B-TECH
  27. Modulus of rigidity and Bulk modulus.
    Very Short Answer Dec-2005 • PTU B-TECH
  28. What is creep? Explain the different stages of creep with the help of common diagram.
    Long Answer Dec-2005 • PTU B-TECH
  29. Differentiate between torsion and bending.
    Short Answer Dec-2005 • 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?

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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?

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

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