UPSC CSE Mechanical Engineering Optional Syllabus 2021
By On June 5th, 2021
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UPSC CSE Mechanical Engineering Optional Syllabus for 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 structure of solids, common ferrous and non-ferrous materials and their
applications; heat-treatment of steels; non-metalsplastics, cermics, composite materials and
nano-materials.
3.Theory of Machines :
Kinematic and dynamic analysis of plane mechanisms. Cams, Gears and empicyclie gear trains,
flywheels, governors, balancing of rigid rotors, balancing of single and multicy- linder 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 – Merhant’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 guages; 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
blancing of multi model and stochastic assembly lines; inventory management-probablistic
inventory models for order time and order quanitity 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.
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UPSC CSE Mechanical Engineering Optional Syllabus for Paper-II
1. Thermodynamics, Gas Dynamics 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
simple wall, solid and hollow cylinder and spheres.
2.2 Convection heat transfer—Newton’s law of convection; free and forces convection; heat
transfer during 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 transfer—Reynolds, Colbum, Prandtl analogies; heat
transfer during laminar and turbulent flow through horizontal tubes; free convection from
horizontal and vertical plates.
2.3 Black body radiation—basic radiation laws such as Stefan-boltzman, Planck distribution,
Wein’s displacement etc.
2.4 Basic heat exchanger analysis; classification of heat exchangers.
3. Engines :
3.1 Classification, themodynamic 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 Ranking 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; ecofriendly
refrigerants—R 134a. 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.

Frequently Asked Questions (FAQs) On UPSC CSE Optional Syllabus 

Question- What is the UPSC’s Annual Programme (Calendar) of Examinations/RTs (Recruitment Tests)?
Answer – The UPSC publishes an Annual Programme (Calendar) of all the Structured Examinations/RTs conducted by it at least 6 months in advance (i.e. in June) for the Examinations/RTs to be conducted during the next calendar year. The Programme is uploaded on the UPSC’s website as also published in the leading news papers of the country. The date of issue of Examination Notice for each Examination is also mentioned in this Annual Programme.

Question- What happens if a candidate submits multiple online applications?
Answer – While a candidate should avoid submitting more than one online application, in case of doing so, the data provided in the last application (highest RID Number), that is successfully submitted online, is accepted by the Commission. All previous applications are ignored as these are amalgamated with the last completed & finally submitted application. If an applicant (who has already submitted an application successfully) wants to
make amendments in the application, then he has to submit a fresh application on or before the last date of submission of application of the Examination. Therefore, it must be ensured that fee is submitted against the
last online application only, which should also be complete in all respects including its final submission. Fee paid against one RID shall not be adjusted against any other RID number

Question- What action is taken by the Commission in case of submission of false information by the candidates?
Answer – A candidate found to be furnishing false information to the Commission or suppressing information, adopting various unfair means in the Examination like impersonation, cheating, etc., is liable to be disqualified
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