ias junior mechanical engineering




Mechanical Engineering Syllabus PAPER – I

1. Mechanics:

1.1 Mechanics of rigid bodies: Equations of equilibrium in space and its application; first and second moments of area; simple problems on friction; kinematics of particles for plane motion; elementary particle dynamics.

1.2 Mechanics of deformable bodies: Generalized Hooke’s law and its application; design problems on axial stress, shear stress and bearing stress; material properties for dynamic loading; bending shear and stresses in beams;. determination of principle stresses and strains – analytical and graphical; compound and combined stresses; bi- axial stresses – thin walled pressure vessel; material behaviour and design factors for dynamic load; design of circular shafts for bending and torsional load only; deflection of beam for statically determinate problems; theories of failure.

2. Engineering Materials:

Basic concepts on the structure of solids; common ferrous and non-ferrous materials and their applications; heat-treatment of steels; non-metals- plastics, ceramics, composite materials and nano-materials.

3. Theory of Machines:

Kinematic and dynamic analysis of plane mechanisms. Cams, Gears and epicyclic gear trains, flywheels, governors, balancing of rigid rotors, balancing of single and multicylinder engines, linear vibration analysis of mechanical systems (single degree of freedom), Critical speeds and whirling of shafts.

4. Manufacturing Science:

4.1 Manufacturing Process: Machine tool engineering – Merchant’s force analysis; Taylor’s tool life equation; conventional machining; NC and CNC machining process; jigs and fixtures. Non-conventional machining – EDM, ECM, ultrasonic, water jet machining etc; application of lasers and plasmas; energy rate calculations. Forming and welding processes- standard processes. Metrology – concept of fits and tolerances; tools and gauges; comparators; inspection of length; position; profile and surface finish.

4.2. Manufacturing Management: System design: factory location- simple OR models; plant layout – methods based; applications of engineering economic analysis and break- even analysis for product selection, process selection and capacity planning; predetermined time standards. System planning; forecasting methods based on regression and decomposition, design and balancing of multi modelandstochastic assembly lines; inventory management – probabilistic inventory models for order time and order quantity determination; JIT systems; strategic sourcing; managing inter plant logistics. System operations and control: Scheduling algorithms for job shops; applications of statistical methods for product and process quality control – applications of control charts for mean, range, percent defective, number of defectives and defects per unit; quality cost systems; management of resources, organizations and risks in projects. System improvement: Implementation of systems, such as total quality management, developing and managing flexible, lean and agile organizations.


Mechanical Engineering Syllabus PAPER – II

1. Thermodynamics, Gas Dynamics, and Turbine:

1.1   Basic concept of First – law and second law of Thermodynamics; concept of entropy and reversibility; availability and unavailability and irreversibility. 1.2   Classification and properties of fluids; incompressible and compressible fluids flows; effect of Mach number and compressibility; continuity momentum and energy equations; normal and oblique shocks; one dimensional isentropic flow; flow or fluids in duct with frictions that transfer. 1.3  Flow through fans, blowers and compressors; axial and centrifugal flow configuration; design of fans and compressors; single problems compresses and turbine cascade; open and closed cycle gas turbines; work done in the gas turbine; reheat and regenerators.

2. Heat Transfer:

2.1  Conduction heat transfer- general conduction equation – Laplace, Poisson and Fourier equations; Fourier law of conduction; one-dimensional steady-state heat conduction applied to the simple wall, solid and hollow cylinder & spheres. 2.2   Convection heat transfer- Newton’s law of convection; free and forces convection; heat transfer during the laminar and turbulent flow of an incompressible fluid over a flat plate; concepts of Nusselt number, hydrodynamic and thermal boundary layer their thickness; Prandtl number; analogy between heat and momentum transferReynolds, Colbum, Prandtl analogies; heat transfer during laminar and turbulent flow through horizontal tubes; free convection from horizontal and vertical plates. 2.3    Blackbody radiation – basic radiation laws such as Stefan-Boltzmann, Planck distribution, Wein’s displacement etc. 2.4  Basic heat exchanger analysis; classification of heat exchangers.

3. I .C. Engines:

3.1    Classification, thermodynamic cycles of operation; determination of break power, indicated power, mechanical efficiency, heat balance sheet, interpretation of performance characteristics, petrol, gas and diesel engines. 3.2   Combustion in SI and CI engines, normal and abnormal combustion; effect of working parameters on knocking, reduction of knocking; Forms of combustion chamber for SI and CI engines; rating of fuels; additives; emission. 3.3 Different systems of IC engines- fuels; lubricating; cooling and transmission systems. Alternate fuels in IC engines.

4. Steam Engineering:

4.1    Steam generation- modified Rankine cycle analysis; Modern steam boilers; steam at critical and supercritical pressures; draught equipment; natural and artificial draught; boiler fuels solid, liquid and gaseous fuels. Steam turbines – principle; types; compounding; impulse and reaction turbines; axial thrust. 4.2   Steam nozzles- flow of steam in convergent and divergent nozzle; pressure at throat for maximum discharge with different initial steam conditions such as wet, saturated and superheated, effect of variation of back pressure; supersaturated flow of steam in nozzles, Wilson line. 4.3 Rankine cycle with internal and external irreversibility; reheat factor; reheating and regeneration, methods of governing; back pressure and pass out turbines. 4.4  Steam power plants – combined cycle power generation; heat recovery steam generators (HRSG) fired and unfired, co- generation plants.

5. Refrigeration and air-conditioning:

5.1    Vapour compression refrigeration cycle – cycle on p-H & T-s diagrams; eco-friendly refrigerants – R134a,123; Systems like evaporators, condensers, compressor, expansion devices. Simple vapour absorption systems. 5.2    Psychrometry – properties; processes; charts; sensible heating and cooling; humidification and dehumidification effective temperature; air-conditioning load calculation; simple duct design.

Reference books:

  1. Fundamentals of Classed Thermodynamics – Van Wylen
  2. Heat Transfer – Gupta Prakash
  3. Heat and Mass Transfer – R. Yadav
  4. Energy Conversion – Sukhalmoy
  5. Environmental Pollution Central Engineering C S Rao
  6. Surveying and Levelling – T P Kanetakar
  7. Heat Conversion – Arora & Kundwar
  8. Manufacturing Science – R K Jain
  9. Thermodynamics – R Yadav Theory of Mechanics – S S Rattan
  10. Theory of Mechanism and Mechanics – Jagdish Lal.
  11. Mechanic of Solids – Popru
  12. Manufacturing Science – Ghosh and Malik
  13. Manufacturing Technology – P N Rao
  14. Production Management – R K Jain
  15. Principles of Manufacturing Material & Process – Campbeu



  • Mechanical engineering is a professional degree subject that deals with the construction, design, and use of machines.
  • Those who are from Mechanical engineering background can only handle this optional subject.
  • Students with strong knowledge in mechanical subject can score good marks.


  • This optional is recommended only for mechanical subject background.
  • One needs to be strong in mechanical engineering subjects.
  • Vast syllabus.

How to prepare:

  • Make previous year questions as your guiding compass. Identify and prioritise the favourite topics of UPSC. (Solutions for previous year questions are now available in the market)
  • Don’t leave any topic of syllabus untouched. Cover at least the basics of all the topics
  • Prepare short notes of formulae and other facts, figures and diagrams for last minute revisions. It gives immense confidence just before the exam
  • Revise syllabus and questions as many times as you can
  • Practice solving papers in time bound manner
  • Question selection is important. For instance, in a question, if choice is given, sometimes one of those choices can be solved in 5 minutes, whereas the other choice may take 15 minutes to solve. So, try to develop a judgement for question types during practice itself. It’ll help you in exam in time management and not getting stuck in difficult questions
  • Avoid silly mistakes in numericals. Find right balance between speed and efficiency.

Previous Year Question Papers:


2010 2011 2012 2013 2014 2015 2016 2017 2018
Paper – 1 Paper – 1

Paper – 2

Paper – 1

Paper – 2

Paper – 1 Paper – 1

Paper – 2

Paper – 1

Paper – 2

Paper – 1

Paper – 2

Paper – 1

Paper – 2

Paper – 1

Paper – 2


Sample Previous Year Solutions(pdfs):

HMT solutions

IC Engines solutions

Industrial solutions

Mfg solutions

Powerplant and fluids solutions

Refri solutions

SOM solutions

Thermo solutions

ToM solutions