Solved question paper for EME May-2013 (B-TECH 1st-2nd)
Solved Question Paper
Elements of mechanical engineering May-2013
PTU • B-TECH • Information Technology • 1st-2nd • May-2013
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.
PART-A
1. Basic Concepts of Thermodynamics (08)
Definition of thermodynamic: Need to study thermodynamics; Application areas of thermodynamic; Difference between Microscopic (or, Statistical) thermodynamics and Macroscopic(or, Classical) thermodynamics; Brief concept of continuum; Thermodynamic System : definition, types (Open, Closed and Isolated) and their examples; Thermodynamic System Boundary : definition, types and their examples; Surroundings; Control(fixed) mass and Control Volume concept and their example ; Thermodynamic State; Thermodynamic Property: definition, types citing their examples; condition for any quantity to be a property; State postulate; Thermodynamic equilibrium (which includes Thermal, Mechanical and Chemical equilibrium etc.); Thermodynamic path; Thermodynamic process: definition, concept of reversible process, quasi-static (or, quasi-equilibrium) process, irreversible process, conditions for reversibility and how these are met with, non-flow processes and flow processes, method of representation of reversible and irreversible process on property diagrams; Cyclic process; Thermodynamic Cycle: definition and its concept; Energy and its forms (microscopic and macroscopic); Physical insight to internal energy; Energy transfer across system boundary i.e. transient energies (heat and work); Difference between heat and work; Sign conventions for heat and work interactions; heat and work as path functions; Equality of Temperature and Zeroth law of Thermodynamics.
2. First Law of Thermodynamics and its applications (12)
Definition, essence and corollaries or consequences of first law of Thermodynamics; Expressions for First law of Thermodynamics for a control mass undergoing a Cycle and for process (i.e., a change in state of a control mass) ; Concept of Enthalpy and total energy and differentiation between the two - a thermodynamic property; Compressible and incompressible substances, Specific heats, Difference between Internal Energy and Enthalpy of compressible and incompressible substances; Representation of first law of thermodynamics as rate equation; Analysis of non-flow/ flow process for a control mass undergoing constant volume, constant pressure, constant temperature, adiabatic and polytropic processes; Free Expansion Process and its examples, its representation on Property diagram; Review of concepts of control volume; Expressions of first law of thermodynamics for a control volume (i.e. open system) ; Steady State Steady Flow process and its examples; First law analysis of Steady State Flow process e.g. isochoric, isobaric, isothermal, isentropic and polytropic process; Throttling process and its applications; Flow energy or inertial energy of flowing fluids or, Energy transport by mass; Application of Steady State Flow Energy Equation to various engineering devices.
3. Second Law of Thermodynamics (16)
Limitations of first law of thermodynamics; and how 2nd law is fully able to explain away and thus overcome those shortcomings of Ist law; Thermal Reservoirs, source and sink (Low temperature and high temperatures); Heat Engine, Heat Pump and Refrigerator: definitions, working, efficiency/performance and their real life examples. Justification as to why the actual efficiency of Heat Pump and Refrigerator shall also be ≤ 100% though on the face of it seems to be more than 100%; Various statements of Second Law of Thermodynamics and their equivalence; Philosophy of Carnot cycle and its consequences viz. how each of the individual four processes constituting the cycle contribute in optimizing the output and efficiency of the cycle; Carnot Engine, Carnot Refrigerator and Carnot Heat Pump: definitions, working, efficiency/performance and Limitations of the cycle; Carnot theorem for heat engines, refrigerators and heat pumps; derivation of Carnot efficiency/COP (which seems to be more than 100%); Thermodynamic Temperature Scale; Clausius theorem and Inequality; Philosophy and concept of entropy; Entropy changes during various processes; Temperature - Entropy Chart and representation of various processes on it; Principle of Increase of Entropy; Applications of Entropy Principle; Quality of Energy viz. high and low grade energies; Degradation of Energy; Third Law of Thermodynamics.
PART-B
4. Gas Power Cycles (12)
Introduction; Concept and philosophy of Air Standard Cycle alongwith associated assumptions and advantages; Air Standard Efficiency; Nomenclature of reciprocating piston-cylinder arrangement with basic definitions such as swept volume, clearance volume, compression ratio, mean effective pressure etc; Otto Cycle (or constant volume heat addition cycle), Diesel cycle (or constant pressure heat addition cycle) and Dual cycle (Mixed or Composite or Limited Pressure cycle) with their representation on P-V and T-S charts, their Air-standard (thermal) Efficiencies; Brayton Cycle, Comparison of Otto, Diesel and Dual cycle under some defined similar parametric conditions; Introduction to heat engines; Merits of I.C. Engines and their important applications, Classification and constructional features of I.C. Engines; working of two stroke and four stroke Petrol and Diesel engines and their comparison.
5. Engineering Materials (05)
Materials and Civilization, Materials and Engineering, Classification of Engineering Materials, Mechanical Properties of Materials: elasticity, plasticity, strength, ductility, brittleness, melleability, toughness, resilience, hardness, machinability, formability, weldability. Properties, Composition, and Industrial Applications of materials: metals (ferrous- cast iron, tool steels, stainless steels and non ferrous- Aluminum, brass, bronze ), polymers (natural and synthetic , thermoplastic and thermosetting), ceramics (glass, optical fibre glass, cements), composites ( fibre reinforced, metal matrix), smart materials (piezoelectric, shape memory, thermochromic, photochromic, magnetorheological), Conductors, Semiconductors and insulators, Organic and Inorganic materials. Selection of materials for engineering applications.
6. Centroid, Centre of Gravity and Moment of Inertia: (08)
Difference between centre of gravity and centroid. Determination of position of centroid of plane geometric figures of I, U, H, L, T, C, Circular and Triangular Sections. Centroid of Composite Areas. Determination of position of Centre of Gravity (CG) of regular solids viz. Right Circular Cone, Solid Hemisphere, thin Hollow Hemisphere. Area moment of inertia & mass moment of inertia, Polar moment of inertia, Parallel axes Theorem (or transfer formula), Perpendicular axes Theorem, Radius of gyration, determination of area Moment of Inertia of I, U, H, L, T, C, Circular and Triangular Sections along various axes. Mass moment of Inertia of Circular Ring, Disc, Cylinder, Sphere and Cone about their axis of symmetry and other axes.
Solved Questions
Solved-
Distinguish between path function and point function.Short Answer 2 Marks May-2013 • PTU B-TECH
-
Dec 2019 Distinguish between point function and a path function.
-
-
Explain the concept of thermodynamic equilibrium.Short Answer 2 Marks May-2013 • PTU B-TECH
-
Dec 2019 Define thermodynamic equilibrium.
-
May 2018 What is meant by thermodynamic equilibrium? How does it differ from thermal equilibrium?
-
Dec 2016 What do you understand by thermodynamic equilibrium?
-
May 2009 Discuss the concept of thermal equilibrium.
-
Dec 2008 What is meant by thermodynamic equilibrium?
-
-
Differentiate between flow work and non-flow work.Short Answer 2 Marks May-2013 • PTU B-TECH
-
What is a steady flow process?Short Answer 2 Marks May-2013 • PTU B-TECH
-
Dec 2023
What is a steady flow process?
-
Dec 2010 What are the assumptions for steady flow process?
-
-
What is the throttling process and give its salient features.Short Answer 2 Marks May-2013 • PTU B-TECH
-
Dec 2019 What is throttling process?
-
May 2010 What is throttling process? Point out its salient aspects.
-
May 2009 What do you understand by throttling process?
-
-
What are the differences between Refrigerator and Heat Pump?Short Answer 2 Marks May-2013 • PTU B-TECH
-
Dec 2018 What is a heat pump? How is it different from a refrigerator?
-
May 2012 What is a heat pump? How is it different from refrigerator?
-
-
Draw P-V and T-S plot for dual cycle.Short Answer 2 Marks May-2013 • PTU B-TECH
-
May 2010 Draw P-V and T-S diagrams for Brayton cycle.
-
Dec 2005 Draw P-V and T-S diagram for an engine operated by Dual cycle.
-
-
Define link, kinematic chain with example.Short Answer 2 Marks May-2013 • PTU B-TECH
-
May 2017 What is kinematic chain?
-
May 2017 State different types of basic kinematic chain.
-
Dec 2014 What is kinematic chain?
-
May 2012 What are kinematic links? How are they classified?
-
May 2011 Define kinematic link, kinematic pair and kinematic chain.
-
Dec 2010 What is kinematic link.
-
Dec 2009 Define kinematic link, kinematic pair and kinematic chain.
-
Dec 2007 Define link, kinematic chain with example.
-
-
What is inversion of Mechanism?Short Answer 2 Marks May-2013 • PTU B-TECH
-
Differentiate between Creep and Fatigue.Short Answer 2 Marks May-2013 • PTU B-TECH
-
Dec 2023 a) Differentiate between the following: i) Creep and fatigue
-
-
Define the characteristic gas constant. How does it differ from universal gas constant? Write the units for these constants.Long Answer 4 Marks May-2013 • PTU B-TECH
-
Set up an expression for the displacement work done during any arbitrary process.Long Answer 4 Marks May-2013 • PTU B-TECH
-
May 2016 Set up an expression for the displacement work done during any arbitrary process.
-
May 2016 Set up an expression for the displacement work done during any arbitrary process.
-
Dec 2012 Set up an expression for the displacement work done during an arbitrary process.
-
-
What is the essence of first law of thermodynamics? Write down expression for the first law applied to cycle.Short Answer 4 Marks May-2013 • PTU B-TECH
-
Dec 2023
Name and state the property introduced by the first law of thermodynamics.
-
Dec 2023 What is the essence of first law of thermodynamics? Write down expression for the first law applied to
-
May 2020 Explain briefly the zeroth law of thermodynamics.
-
Dec 2020 Explain briefly zeroth law of thermodynamics.
-
Dec 2020 Explain the first law of thermodynamics with respect to close systems.
-
May 2016 Name and state the property introduced by the first law of thermodynamics.
-
Dec 2016 What is first law of thermodynamics?
-
May 2015 Define and explain the Zeroth law of thermodynamics.
-
May 2013 What is the essence of first law of thermodynamics? Write down expression for the first law applied to process.
-
Dec 2010 Define and explain the Zeroth law of thermodynamics. Why is it so called.
-
Dec 2009 Define and explain Zeroth law of thermodynamics? Why it is so called?
-
May 2008 What is zeroth law of thermodynamics?
-
-
What is the essence of first law of thermodynamics? Write down expression for the first law applied to process.Short Answer 4 Marks May-2013 • PTU B-TECH
-
Dec 2023
Name and state the property introduced by the first law of thermodynamics.
-
Dec 2023 What is the essence of first law of thermodynamics? Write down expression for the first law applied to
-
May 2020 Explain briefly the zeroth law of thermodynamics.
-
Dec 2020 Explain briefly zeroth law of thermodynamics.
-
Dec 2020 Explain the first law of thermodynamics with respect to close systems.
-
May 2016 Name and state the property introduced by the first law of thermodynamics.
-
Dec 2016 What is first law of thermodynamics?
-
May 2015 Define and explain the Zeroth law of thermodynamics.
-
May 2013 What is the essence of first law of thermodynamics? Write down expression for the first law applied to cycle.
-
Dec 2010 Define and explain the Zeroth law of thermodynamics. Why is it so called.
-
Dec 2009 Define and explain Zeroth law of thermodynamics? Why it is so called?
-
May 2008 What is zeroth law of thermodynamics?
-
-
Define an adiabatic process. Show that for a reversible adiabatic process of a given mass of perfect gas P v^γ = Constant.Long Answer 4 Marks May-2013 • PTU B-TECH
-
A steady flow of water at enthalpy 250 kJ/kg enters a section of heating plant of a 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-2013 • PTU B-TECH
-
May 2016 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.
-
-
Three carnot engines E1, E2, E3 operate between temperature of 1000 K and 300 K. Make calculations for the intermediate temperature if the work produced by the engines are in the ratio of 4 : 3 : 2.Long Answer 8 Marks May-2013 • PTU B-TECH
-
Derive an expression for the air standard efficiency and mean effective pressure of a Diesel cycle. State the assumptions made.Long Answer 8 Marks May-2013 • PTU B-TECH
-
Dec 2020 Derive the expression for the efficiency of the Diesel cycle.
-
Dec 2016 What is air standard efficiency? Write its expression for diesel cycle.
-
Dec 2016 Derive the expression for the ideal efficiency of Diesel cycle.
-
May 2015 Derive the efficiency equation for Diesel cycle.
-
Dec 2014 Write down the expression for air standard efficiency for a diesel engine?
-
May 2012 Derive an expression for efficiency and mean effective pressure for a Diesel cycle.
-
Dec 2011 Derive an expression for mean effective pressure of diesel cycle.
-
Dec 2007 What is air standard efficiency? Write its expression for diesel cycle.
-
-
Discuss briefly the working of a 4 Stroke Petrol engine.Short Answer 4 Marks May-2013 • PTU B-TECH
-
Dec 2023 Explain the construction and working of four stroke petrol engine.
-
Dec 2019 Explain the working of two stroke petrol engine giving neat sketch.
-
Dec 2018 Explain the working of a two-stroke petrol engine with the help of neat sketches. What are the demerits of two-stroke engines?
-
May 2016 Write short notes on working of two stroke petrol engine.
-
May 2012 Describe the working principle of a two stroke petrol engine with a neat diagram.
-
Dec 2011 Explain the working of two stroke C.I. engine with the help of neat sketches.
-
May 2007 Explain the working of two stroke IC engine with neat sketches.
-
Dec 2007 Explain the working of four stroke IC engine with neat sketches.
-
-
Make a labelled sketch of Oldham Coupling.Short Answer 4 Marks May-2013 • PTU B-TECH
-
May 2011 Make a labeled sketch of the Oldham coupling and list its uses.
-
Dec 2010 Make a labelled sketch of Oldham coupling?
-
-
What is Pulley? State the working of a third system of Pulleys. Derive the relation of its velocity ratio.Long Answer 8 Marks May-2013 • PTU B-TECH
-
Show that the volumetric strain of a body is the algebraic sum of the linear strains in three mutually perpendicular directions.Long Answer 6 Marks May-2013 • PTU B-TECH
-
Define factor of safety.Very Short Answer 2 Marks May-2013 • PTU B-TECH
-
Define Poisson’s ratio.Very Short Answer 2 Marks May-2013 • PTU B-TECH
-
May 2015 Define poisson\'s ratio.
-
May 2009 What is Poisson\'s ratio?
-
May 2007 Define Poisson’s ratio.
-
-
Define strain energy.Very Short Answer 2 Marks May-2013 • PTU B-TECH
Explore all data
FAQ
Frequently Asked Questions
Answers about this subject, solved papers, and preparation.
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.