Solved question paper for EME May-2017 (B-TECH 1st-2nd)
Solved Question Paper
Elements of mechanical engineering May-2017
PTU • B-TECH • Information Technology • 1st-2nd • May-2017
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-
What is quasi-static and irreversible process?Short Answer 2 Marks May-2017 • PTU B-TECH
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May 2023 1(a) What is a quasi-static process?
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Dec 2020 What is a quasi-static process?
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May 2016 What is a quasi-static process?
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May 2009 What do you understand by quasi-static process? How is it achieved?
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Name the few intrinsic properties.Short Answer 2 Marks May-2017 • PTU B-TECH
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May 2015 Name the few extrinsic properties.
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Define internal energy.Short Answer 2 Marks May-2017 • PTU B-TECH
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May 2020 Define internal energy.
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Dec 2020 Define Internal Energy.
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May 2016 Define internal energy.
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Dec 2014 Define internal energy?
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May 2008 Define internal energy.
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Write the SFEE for a turbine.Short Answer 2 Marks May-2017 • PTU B-TECH
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Draw the PV diagram for isentropic process.Short Answer 2 Marks May-2017 • PTU B-TECH
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May 2017 Draw the PV and TS diagrams for isobaric process.
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Dec 2017 Define Isobaric process and draw its PV diagram.
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May 2015 Draw the PV and TS diagrams for isochoric process.
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May 2015 Draw the PV diagram for adiabatic process.
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May 2010 Draw P-V diagram for isobaric, isochoric and isothermal process.
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Draw the TS diagram for Diesel cycle.Short Answer 2 Marks May-2017 • PTU B-TECH
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May 2017 Draw the PV and TS diagram of Diesel cycle.
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May 2015 Explain the working principle of Diesel cycle with the help of PV and TS diagrams.
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Define mechanism.Short Answer 2 Marks May-2017 • PTU B-TECH
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What is mechanical advantage?Short Answer 2 Marks May-2017 • PTU B-TECH
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Define poison's ratio.Short Answer 2 Marks May-2017 • PTU B-TECH
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Define modulus of elasticity.Short Answer 2 Marks May-2017 • PTU B-TECH
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May 2015 Define modulus of rigidity.
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May 2007 Define bulk modulus.
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Write down the general steady flow energy equation (SFEE) and simplify it when applied to condenser.Long Answer 4 Marks May-2017 • PTU B-TECH
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May 2017 Write down the general steady flow energy equation (SFEE) and simplify it when applied to evaporator.
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Dec 2014 Derive the steady flow energy equation (SFEE) for Condenser.
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Dec 2014 Derive the steady flow energy equation (SFEE) for Evaporator.
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Write down the general steady flow energy equation (SFEE) and simplify it when applied to evaporator.Long Answer 4 Marks May-2017 • PTU B-TECH
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May 2017 Write down the general steady flow energy equation (SFEE) and simplify it when applied to condenser.
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Dec 2014 Derive the steady flow energy equation (SFEE) for Condenser.
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Dec 2014 Derive the steady flow energy equation (SFEE) for Evaporator.
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In air compressor air enters at 1.013 bar and 27 degree centigrade having volume 5.0 m3/kg and it is compressed to 12 bar isothermally. Determine work done.Long Answer 8 Marks May-2017 • PTU B-TECH
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May 2017 One kg of air enters a compressor at 10 5 Pa and 25°C having volume of 1.8 m3 and is compressed to 5 × 105 Pa isothermally determine the work done.
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May 2017 One kg of air enters a compressor at 10 5 Pa and 25°C having volume of 1.8 m3 and is compressed to 5 × 105 Pa isothermally determine the change in internal energy.
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May 2017 One kg of air enters a compressor at 10 5 Pa and 25°C having volume of 1.8 m3 and is compressed to 5 × 105 Pa isothermally determine the heat transferred.
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May 2017 In air compressor air enters at 1.013 bar and 27 degree centigrade having volume 5.0 m3/kg and it is compressed to 12 bar isothermally. Determine heat transfer.
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May 2017 In air compressor air enters at 1.013 bar and 27 degree centigrade having volume 5.0 m3/kg and it is compressed to 12 bar isothermally. Determine change in internal energy.
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May 2015 One kg of air enters a compressor at 105 Pa and 25°C having volume of 1.8 m3 and is compressed to 5 × 105 Pa isothermally. Determine the work done.
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May 2015 One kg of air enters a compressor at 105 Pa and 25°C having volume of 1.8 m3 and is compressed to 5 × 105 Pa isothermally. Determine the change in internal energy.
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May 2015 One kg of air enters a compressor at 105 Pa and 25°C having volume of 1.8 m3 and is compressed to 5 × 105 Pa isothermally. Determine the heat transferred.
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May 2015 In air compressor air enters at 1.013 bar and 27 degree centigrade having volume 5.0 m3/kg and it is compressed to 12 bar isothermally. Determine work done, heat transfer and change in internal energy.
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In air compressor air enters at 1.013 bar and 27 degree centigrade having volume 5.0 m3/kg and it is compressed to 12 bar isothermally. Determine heat transfer.Long Answer 8 Marks May-2017 • PTU B-TECH
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May 2017 One kg of air enters a compressor at 10 5 Pa and 25°C having volume of 1.8 m3 and is compressed to 5 × 105 Pa isothermally determine the work done.
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May 2017 One kg of air enters a compressor at 10 5 Pa and 25°C having volume of 1.8 m3 and is compressed to 5 × 105 Pa isothermally determine the change in internal energy.
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May 2017 One kg of air enters a compressor at 10 5 Pa and 25°C having volume of 1.8 m3 and is compressed to 5 × 105 Pa isothermally determine the heat transferred.
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May 2017 In air compressor air enters at 1.013 bar and 27 degree centigrade having volume 5.0 m3/kg and it is compressed to 12 bar isothermally. Determine work done.
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May 2017 In air compressor air enters at 1.013 bar and 27 degree centigrade having volume 5.0 m3/kg and it is compressed to 12 bar isothermally. Determine change in internal energy.
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May 2015 One kg of air enters a compressor at 105 Pa and 25°C having volume of 1.8 m3 and is compressed to 5 × 105 Pa isothermally. Determine the work done.
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May 2015 One kg of air enters a compressor at 105 Pa and 25°C having volume of 1.8 m3 and is compressed to 5 × 105 Pa isothermally. Determine the change in internal energy.
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May 2015 One kg of air enters a compressor at 105 Pa and 25°C having volume of 1.8 m3 and is compressed to 5 × 105 Pa isothermally. Determine the heat transferred.
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May 2015 In air compressor air enters at 1.013 bar and 27 degree centigrade having volume 5.0 m3/kg and it is compressed to 12 bar isothermally. Determine work done, heat transfer and change in internal energy.
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In air compressor air enters at 1.013 bar and 27 degree centigrade having volume 5.0 m3/kg and it is compressed to 12 bar isothermally. Determine change in internal energy.Long Answer 8 Marks May-2017 • PTU B-TECH
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May 2017 One kg of air enters a compressor at 10 5 Pa and 25°C having volume of 1.8 m3 and is compressed to 5 × 105 Pa isothermally determine the work done.
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May 2017 One kg of air enters a compressor at 10 5 Pa and 25°C having volume of 1.8 m3 and is compressed to 5 × 105 Pa isothermally determine the change in internal energy.
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May 2017 One kg of air enters a compressor at 10 5 Pa and 25°C having volume of 1.8 m3 and is compressed to 5 × 105 Pa isothermally determine the heat transferred.
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May 2017 In air compressor air enters at 1.013 bar and 27 degree centigrade having volume 5.0 m3/kg and it is compressed to 12 bar isothermally. Determine work done.
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May 2017 In air compressor air enters at 1.013 bar and 27 degree centigrade having volume 5.0 m3/kg and it is compressed to 12 bar isothermally. Determine heat transfer.
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May 2015 One kg of air enters a compressor at 105 Pa and 25°C having volume of 1.8 m3 and is compressed to 5 × 105 Pa isothermally. Determine the work done.
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May 2015 One kg of air enters a compressor at 105 Pa and 25°C having volume of 1.8 m3 and is compressed to 5 × 105 Pa isothermally. Determine the change in internal energy.
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May 2015 One kg of air enters a compressor at 105 Pa and 25°C having volume of 1.8 m3 and is compressed to 5 × 105 Pa isothermally. Determine the heat transferred.
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May 2015 In air compressor air enters at 1.013 bar and 27 degree centigrade having volume 5.0 m3/kg and it is compressed to 12 bar isothermally. Determine work done, heat transfer and change in internal energy.
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What is Carnot Theorem? Describe Claussis inequality concept with the help of Carnot theorem.Long Answer 8 Marks May-2017 • PTU B-TECH
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May 2015 What is Carnot Theorem? Describe Claussius inequality concept with the help of Carnot theorem.
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An inventor claims that his engine has the following specifications: Power developed = 75 KW; Temperature limits = 1000 K and 400 K; Fuel burnt = 5 Kg/hr; Heating value of fuel = 75,000 KJ/Kg. State whether his claim is valid or not.Long Answer 8 Marks May-2017 • PTU B-TECH
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Derive the expression for air standard efficiency for Otto cycle. Also draw its PV and T-S diagram.Long Answer 8 Marks May-2017 • PTU B-TECH
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Dec 2023 Draw Otto cycle and derive its air standard efficiency and mean effective pressure.
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Dec 2018 Derive an expression for the air standard thermal efficiency of Otto cycle.
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Dec 2016 Derive an expression for efficiency and mean effective pressure of Otto cycle.
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Dec 2010 Derive an expression for the air standard efficiency and mean effective pressure of an Otto cycle. State the assumptions made.
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May 2007 Derive the expression for the air standard efficiency for otto cycle.
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What is kinematic chain?Short Answer 4 Marks May-2017 • PTU B-TECH
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May 2017 State different types of basic kinematic chain.
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Dec 2014 What is kinematic chain?
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May 2013 Define link, kinematic chain with example.
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May 2012 What are kinematic links? How are they classified?
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May 2011 Define kinematic link, kinematic pair and kinematic chain.
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Dec 2010 What is kinematic link.
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Dec 2009 Define kinematic link, kinematic pair and kinematic chain.
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Dec 2007 Define link, kinematic chain with example.
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How many links are required to form a constrained kinematic chain?Short Answer 4 Marks May-2017 • PTU B-TECH
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State different types of basic kinematic chain.Short Answer 4 Marks May-2017 • PTU B-TECH
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May 2017 What is kinematic chain?
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Dec 2014 What is kinematic chain?
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May 2013 Define link, kinematic chain with example.
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May 2012 What are kinematic links? How are they classified?
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May 2011 Define kinematic link, kinematic pair and kinematic chain.
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Dec 2010 What is kinematic link.
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Dec 2009 Define kinematic link, kinematic pair and kinematic chain.
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Dec 2007 Define link, kinematic chain with example.
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Justify with neat sketch elliptical trammel as an inversion of double slider crank chain.Long Answer 4 Marks May-2017 • PTU B-TECH
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Draw and explain the stress-strain diagram for the ductile materials.Long Answer 8 Marks May-2017 • PTU B-TECH
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Dec 2020 Draw (only) and list stress strain diagram of ductile materials.
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Dec 2014 Explain the stress starin diagram for ductile materials?
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A circular rod of 200mm diameter and length 350mm subjected to an axial compressive load of 280kN resulted in an increase of diameter by 0.125mm and a decrease in length of 0.30 mm. Calculate the value of Poisson's ratio.Long Answer 4 Marks May-2017 • PTU B-TECH
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May 2017 A circular rod of 200mm diameter and length 350mm subjected to an axial compressive load of 280kN resulted in an increase of diameter by 0.125mm and a decrease in length of 0.30 mm. Calculate Young\'s modulus of elasticity.
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May 2015 A circular rod of 200mm diameter and length 350mm subjected to an axial compressive load of 280kN resulted in an increase of diameter by 0.125mm and a decrease in length by 0.30mm. Calculate the value of Poisson\'s ratio and Young\'s modulus of elasticity.
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A circular rod of 200mm diameter and length 350mm subjected to an axial compressive load of 280kN resulted in an increase of diameter by 0.125mm and a decrease in length of 0.30 mm. Calculate Young's modulus of elasticity.Long Answer 4 Marks May-2017 • PTU B-TECH
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May 2017 A circular rod of 200mm diameter and length 350mm subjected to an axial compressive load of 280kN resulted in an increase of diameter by 0.125mm and a decrease in length of 0.30 mm. Calculate the value of Poisson\'s ratio.
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May 2015 A circular rod of 200mm diameter and length 350mm subjected to an axial compressive load of 280kN resulted in an increase of diameter by 0.125mm and a decrease in length by 0.30mm. Calculate the value of Poisson\'s ratio and Young\'s modulus of elasticity.
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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?
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.
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