Solved question paper for EME Dec-2007 (B-TECH 1st-2nd)

Solved Question Paper

Elements of mechanical engineering Dec-2007

PTU • B-TECH • Information Technology • 1st-2nd • Dec-2007

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. Write steady flow energy equation for a steam turbine.
    Short Answer Dec-2007 • PTU B-TECH
  2. Represent isothermal and adiabatic processes on p-v chart.
    Short Answer Dec-2007 • PTU B-TECH
  3. Define thermodynamic state, path, process and cycle.
    Short Answer Dec-2007 • PTU B-TECH
  4. How zeroth law of thermodynamics is applied in thermometry?
    Short Answer Dec-2007 • PTU B-TECH
  5. How do you state flow and non flow work mathematically?
    Short Answer Dec-2007 • PTU B-TECH
  6. What is air standard efficiency? Write its expression for diesel cycle.
    Short Answer Dec-2007 • PTU B-TECH
  7. Define link, kinematic chain with example.
    Short Answer Dec-2007 • PTU B-TECH
  8. State the law of lifting machine.
    Short Answer Dec-2007 • PTU B-TECH
  9. Differentiate between creep and fatigue.
    Short Answer Dec-2007 • PTU B-TECH
  10. Draw differential wheel and axle arrangement.
    Short Answer Dec-2007 • PTU B-TECH
  11. A mass of 10 kg at room temperature is dropped from a height of 10 m into a bucket at room temperature containing 200 kg of water. Calculate the change in internal, potential and kinetic energies, heat and work transfer for case (a): Stone is just about to strike the water.
    Long Answer Dec-2007 • PTU B-TECH
  12. A mass of 10 kg at room temperature is dropped from a height of 10 m into a bucket at room temperature containing 200 kg of water. Calculate the change in internal, potential and kinetic energies, heat and work transfer for case (b): Stone just stopped at bottom of bucket.
    Long Answer Dec-2007 • PTU B-TECH
  13. During a non-flow frictionless compression process the volume changes from 0.12 m^3 to 0.04 m^3 and system rejects 40 kJ of heat. Determine the change in internal energy, heat loss and enthalpy if pressure varies with volume as p(bar) = 4.5(v) + 2; where v in m^3 and internal energy is given by the equation U = 40 – p(bar).v(m^3).
    Long Answer Dec-2007 • PTU B-TECH
  14. A steady operating pneumatic motor develops a shaft power of 0.1 kW when supplied with dry air at a pressure of 10 bar and at a temperature of 300 K and exhausting at 1 bar. The motor is adiabatic and the isentropic efficiency is 0.7. Determine the temperature of the air leaving the motor (°C) and mass flow rate.
    Long Answer Dec-2007 • PTU B-TECH
  15. An engine has a compression ratio of 5. The bore and stroke are 150 mm and 250 mm respectively. At the beginning of compression the air is at 1 bar and 27°C, compression then occur according to the law pv^1.2 = constant. Calculate the temperature at the end of compression.
    Long Answer Dec-2007 • PTU B-TECH
  16. An engine has a compression ratio of 5. The bore and stroke are 150 mm and 250 mm respectively. At the beginning of compression the air is at 1 bar and 27°C, compression then occur according to the law pv^1.2 = constant. Calculate the work done during compression.
    Long Answer Dec-2007 • PTU B-TECH
  17. An engine has a compression ratio of 5. The bore and stroke are 150 mm and 250 mm respectively. At the beginning of compression the air is at 1 bar and 27°C, compression then occur according to the law pv^1.2 = constant. Calculate the interchange of heat between the air and the cylinder walls during compression.
    Long Answer Dec-2007 • PTU B-TECH
  18. Calculate the change in entropy of the universe owing to the following process: 0.5 kg of copper block at 100°C is placed in water reservoir at 10°C.
    Long Answer Dec-2007 • PTU B-TECH
  19. Calculate the change in entropy of the universe owing to the following process: same block at 100°C is dropped from height of 100 mm into the reservoir and comes to rest without any change of temperature of the block.
    Long Answer Dec-2007 • PTU B-TECH
  20. Calculate the change in entropy of the universe owing to the following process: two blocks at 100°C and 0°C joined together.
    Long Answer Dec-2007 • PTU B-TECH
  21. Explain the working of four stroke IC engine with neat sketches.
    Long Answer Dec-2007 • PTU B-TECH
  22. Derive the expression for the air standard efficiency for dual cycle.
    Long Answer Dec-2007 • PTU B-TECH
  23. Explain the working of Oldham coupling.
    Short Answer Dec-2007 • PTU B-TECH
  24. A weight of 48 N is to be raised by means of a wheel and axle. The axle is 100 mm diameter and wheel is 400 mm diameter. If the force of 16 N has to be applied to the wheel, find the mechanical advantage.
    Short Answer Dec-2007 • PTU B-TECH
  25. A weight of 48 N is to be raised by means of a wheel and axle. The axle is 100 mm diameter and wheel is 400 mm diameter. If the force of 16 N has to be applied to the wheel, find the velocity ratio.
    Short Answer Dec-2007 • PTU B-TECH
  26. A weight of 48 N is to be raised by means of a wheel and axle. The axle is 100 mm diameter and wheel is 400 mm diameter. If the force of 16 N has to be applied to the wheel, find the efficiency of the machine.
    Short Answer Dec-2007 • PTU B-TECH
  27. Define the following: lateral strain, stress, strength, resilience, Poisson’s ratio and bulk modulus.
    Short Answer Dec-2007 • PTU B-TECH
  28. Derive the expression for stress developed in any prismatic bar under thermal loading.
    Long Answer Dec-2007 • PTU B-TECH
  29. Write a note on mechanical behaviour of engineering material.
    Short Answer Dec-2007 • PTU B-TECH
  30. What do you understand by slider straight line mechanism? Explain the working of pantograph.
    Long Answer Dec-2007 • 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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02 Are these official Punjab Technical University question papers?

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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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