Solved question paper for EME Dec-2009 (B-TECH 1st-2nd)
Solved Question Paper
Elements of mechanical engineering Dec-2009
PTU • B-TECH • Information Technology • 1st-2nd • Dec-2009
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 are similarities and dissimilarities between heat and work?Short Answer 2 Marks Dec-2009 • PTU B-TECH
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Dec 2017 Write similarities between heat and work.
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What is reversible process? Also write conditions for reversibility.Short Answer 2 Marks Dec-2009 • PTU B-TECH
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Dec 2018 State the conditions for a process to be reversible.
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Dec 2012 State the conditions for a process to be reversible.
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Dec 2012 Explain the term reversibility as applied to a thermodynamic process.
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Dec 2005 State the condition for a process to be reversible.
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Why gases have two specific heats?Short Answer 2 Marks Dec-2009 • PTU B-TECH
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May 2016 Define specific heat. Why are there two specific heats for gases?
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Dec 2012 Why there are two values of specific heat for a gas?
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What is PMM1 (perpetual motion machine of first kind)?Short Answer 2 Marks Dec-2009 • PTU B-TECH
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How COP of heat pump and refrigerator are related?Short Answer 2 Marks Dec-2009 • PTU B-TECH
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Dec 2014 What is the c.o.p. for heat pump?
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May 2010 Give the relation between COP of heat pump and refrigerator.
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May 2008 What is the concept of heat pump?
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What is mean effective pressure and what is its role in gas power cycles?Short Answer 2 Marks Dec-2009 • PTU B-TECH
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List different systems of pulleys.Short Answer 2 Marks Dec-2009 • PTU B-TECH
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What are temperature stresses?Short Answer 2 Marks Dec-2009 • PTU B-TECH
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Dec 2016 What is thermal stress?
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May 2011 Define temperature stresses and strains.
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May 2010 Define temperature stresses and strains.
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What is significance of elastic constant?Short Answer 2 Marks Dec-2009 • PTU B-TECH
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What are the limitations of first law of thermodynamics?Short Answer 2 Marks Dec-2009 • PTU B-TECH
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Dec 2016 How does the Second law of thermodynamics overcome the limitation of the First law?
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May 2007 What are the limitations of first law of thermodynamics?
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May 2007 How second law of thermodynamics overcomes the limitation of first law?
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Define and explain Zeroth law of thermodynamics? Why it is so called?Long Answer Dec-2009 • PTU B-TECH
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Dec 2023
Name and state the property introduced by the first law of thermodynamics.
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Dec 2023 What is the essence of first law of thermodynamics? Write down expression for the first law applied to
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May 2020 Explain briefly the zeroth law of thermodynamics.
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Dec 2020 Explain briefly zeroth law of thermodynamics.
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Dec 2020 Explain the first law of thermodynamics with respect to close systems.
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May 2016 Name and state the property introduced by the first law of thermodynamics.
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Dec 2016 What is first law of thermodynamics?
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May 2015 Define and explain the Zeroth law of thermodynamics.
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May 2013 What is the essence of first law of thermodynamics? Write down expression for the first law applied to cycle.
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May 2013 What is the essence of first law of thermodynamics? Write down expression for the first law applied to process.
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Dec 2010 Define and explain the Zeroth law of thermodynamics. Why is it so called.
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May 2008 What is zeroth law of thermodynamics?
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A new temperature scale in degrees N is desired with freezing point at 100°N and the boiling point at 400°N. Establish a correlation between degrees Celsius and degrees N. What would be the absolute temperature at 0°N?Long Answer Dec-2009 • PTU B-TECH
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An air initially at 90 kPa pressure, 700 K temperature and occupying a volume of 0.5 m3 is compressed isothermally till the volume is halved and further it goes compression at constant pressure till the volume is halved again. Sketch the process on p-V diagram and make calculations for total work done and total heat interaction for the two processes. Assume ideal gas behaviour for air and take c_v = 1.004 kJ/kg K.Long Answer Dec-2009 • PTU B-TECH
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May 2016 Air initially at 75 kPa pressure, 1000 K temperature and occupying a volume of 0.12 m3 is compressed isothermally until the volume is halved and subsequently it undergoes further compression at constant pressure till the volume is halved again. Sketch the process on p-V diagram and make calculations for work done.
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May 2009 Air initially at 61 kPa pressure, 800 K temperature and occupying a volume of 0.1 m3 is compressed isothermally till the volume is halved and further it goes through compression at constant pressure till the volume is halved again. Sketch the process on p-V diagram and make calculations for total work done and total heat interaction for the two processes. Assume ideal gas behaviour for air and take R = 1.005 kJ/kg K.
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Explain and derive steady flow energy equation.Long Answer Dec-2009 • PTU B-TECH
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Dec 2023 Derive steady flow energy equation for a single stream of fluid entering and leaving the control volume.
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May 2019 Derive steady flow energy equation for a single stream of fluid entering and leaving the control volume.
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May 2016 Give the differential form of the steady flow energy equation.
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Dec 2016 State the basic assumptions of steady flow energy equation.
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May 2007 State and write the steady flow energy equation.
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A perfect gas flows through a nozzle where it expands in a reversible adiabatic manner. The inlet conditions are 22 bar, 500°C, 38 m/s. At the exit the pressure is 2 bar. Determine the velocity and exit area if the flow rate is a kg/s. Take R = 190 J/kg K and T = 1.35.Long Answer Dec-2009 • PTU B-TECH
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State and explain Carnot theorem.Long Answer Dec-2009 • PTU B-TECH
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Write various statements of second law of thermodynamics and also show their equivalence.Long Answer Dec-2009 • PTU B-TECH
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Dec 2023 a) State Clausius and Kelvin-Planck statements of second law of thermodynamics and prove their equivalence.
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May 2017 State and explain the Kelvin Planck and Claussis statement of second law of thermodynamics.
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Dec 2017 State second law of thermodynamics. Prove the equivalence of Kelvin-Planck statement and Clausius statement of second law of thermodynamics.
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May 2015 State Kelvin-Planck and Claussius statements of second law of thermodynamics? Also show equivalence between them.
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Dec 2014 State Kelvin-Planck and Clausius statements of second low of thermodynamics? Also show equivalence between them.
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May 2010 State Kelvin-Planck and Clausius statements of second law of thermodynamics. Explain the equivalence of Kelvin-Planck and Clausius statements.
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May 2009 Discuss equivalence of various statements of the second law of thermodynamics.
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A reversible heat engine operates within the higher and lower temperature limits of 1400 K and 400 K respectively. The entire output from this engine is utilized to operate a heat pump. The pump works on reversed Carnot cycle, extracts heat from a reservoir at 300 K and delivers it to the reservoir at 400 K. If 100 kJ/s of net heat is supplied to the reservoir at 400 K, calculate the heat supplied to the engine by the reservoir at 1400 K.Long Answer Dec-2009 • PTU B-TECH
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In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the heat supplied.Long Answer Dec-2009 • PTU B-TECH
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May 2011 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Determine: (a) heat supplied, (b) work done, (c) cycle efficiency, (d) peak pressure of the cycle, (e) cut off ratio, (f) M.E.P.
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Dec 2009 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the work done.
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Dec 2009 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the cycle efficiency.
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Dec 2009 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the peak pressure of the cycle.
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Dec 2009 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the cut-off ratio.
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Dec 2009 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the mean effective pressure.
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In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the work done.Long Answer Dec-2009 • PTU B-TECH
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May 2011 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Determine: (a) heat supplied, (b) work done, (c) cycle efficiency, (d) peak pressure of the cycle, (e) cut off ratio, (f) M.E.P.
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Dec 2009 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the heat supplied.
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Dec 2009 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the cycle efficiency.
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Dec 2009 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the peak pressure of the cycle.
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Dec 2009 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the cut-off ratio.
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Dec 2009 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the mean effective pressure.
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In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the cycle efficiency.Long Answer Dec-2009 • PTU B-TECH
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May 2011 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Determine: (a) heat supplied, (b) work done, (c) cycle efficiency, (d) peak pressure of the cycle, (e) cut off ratio, (f) M.E.P.
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Dec 2009 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the heat supplied.
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Dec 2009 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the work done.
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Dec 2009 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the peak pressure of the cycle.
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Dec 2009 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the cut-off ratio.
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Dec 2009 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the mean effective pressure.
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In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the peak pressure of the cycle.Long Answer Dec-2009 • PTU B-TECH
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May 2011 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Determine: (a) heat supplied, (b) work done, (c) cycle efficiency, (d) peak pressure of the cycle, (e) cut off ratio, (f) M.E.P.
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Dec 2009 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the heat supplied.
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Dec 2009 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the work done.
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Dec 2009 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the cycle efficiency.
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Dec 2009 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the cut-off ratio.
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Dec 2009 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the mean effective pressure.
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In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the cut-off ratio.Long Answer Dec-2009 • PTU B-TECH
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May 2011 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Determine: (a) heat supplied, (b) work done, (c) cycle efficiency, (d) peak pressure of the cycle, (e) cut off ratio, (f) M.E.P.
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Dec 2009 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the heat supplied.
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Dec 2009 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the work done.
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Dec 2009 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the cycle efficiency.
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Dec 2009 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the peak pressure of the cycle.
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Dec 2009 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the mean effective pressure.
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In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the mean effective pressure.Long Answer Dec-2009 • PTU B-TECH
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May 2011 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Determine: (a) heat supplied, (b) work done, (c) cycle efficiency, (d) peak pressure of the cycle, (e) cut off ratio, (f) M.E.P.
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Dec 2009 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the heat supplied.
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Dec 2009 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the work done.
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Dec 2009 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the cycle efficiency.
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Dec 2009 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the peak pressure of the cycle.
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Dec 2009 In an air standard diesel cycle, the compression ratio is 15 and the pressure and temperature of the air at the beginning of the compression are 1 bar and 288 K. The peak temperature in the cycle is 2700 K. Calculate the cut-off ratio.
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Draw stress-strain diagram and explain various salient features.Long Answer Dec-2009 • PTU B-TECH
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A conical bar tapers uniformly from a diameter of 4 cm to 15 cm in a length of 40 cm. If an axial force of 80 kN is applied at each end, determine the elongation of the bar. Take E = 200 GPa.Long Answer Dec-2009 • PTU B-TECH
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Define kinematic link, kinematic pair and kinematic chain.Long Answer Dec-2009 • PTU B-TECH
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May 2017 What is kinematic chain?
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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 2007 Define link, kinematic chain with example.
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In a differential wheel and axel, the diameter of the larger axel is 250 mm and that of the smaller is 225 mm. The diameter of the effort wheel is 500 mm. Find the velocity ratio. If an effort of 150 N lifts a load of 3.5 kN, what is the efficiency and effort lost in friction?Long Answer Dec-2009 • PTU B-TECH
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Dec 2016 In a differential wheel and axle, the diameter of the larger axle is 250 mm and that of the smaller 225 mm. The diameter of effort wheel is 500 mm. Find the velocity ratio. If an effort of 150 N lifts a load of 3.5 kN, what is the efficiency and effort lost in friction?
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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.
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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.