IES Mechanical Engineering - Preparation - 2020

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About IES Mechanical Engineering

Mechanical engineering is a discipline of engineering that applies the principles of physics and materials science for analysis, design, manufacturing, and maintenance of mechanical systems. IES Mechanical Engineering is the branch of engineering that involves the production and usage of heat and mechanical power for the design, production, and operation of machines and tools. It is one of the oldest and broadest engineering disciplines. The IES Mechanical Engineering relies on your understanding of the core concepts involved in mechanics, kinematics, thermodynamics, material science and structural analysis. Mechanical engineers use these core principles along with tools like computer-aided engineering and product lifecycle management to design and analyze manufacturing plants, industrial equipment and machinery, heating and cooling systems, transport systems, aircraft, watercraft, robotics, medical devices and more.

Pattern for IES Mechanical Engineering

A combined competitive examination is conducted by the Union Public Services Commission (UPSC) for recruitment to the Indian Engineering Services. The Examination constitutes of a written examination followed by an interview for personality test.
Every IES exam is divided into two sections -
Paper I & Paper II .
While paper I remains common for all the branches/streams of engineering, the paper II is specialized with respect to the branch of engineering students.

IES jobs for Mechanical Engineering

Indian Engineering Services(IES) include technical and managerial services for government of India. The pay scale of Indian Engineering Services is as high as the pay scale of IAS officers. After 7th pay commission, an IES officer with their esteemed cadre receives more benefits along with high salary and varied allowances and benefits. The recruitment of qualified candidates are made under the following sectors:

  1. Indian Railway Service of Mechanical Engineers
  2. Indian Railway Stores Service
  3. Central Water Engineering Service
  4. Indian Ordnance Factories Service
  5. Indian Naval Armament Service
  6. Assistant Executive Engineer (in Ministry of Defence)
  7. Assistant Naval Store officer Grade I in Indian Navy
  8. Central Electrical & Mechanical Engineering Service
  9. Assistant Executive Engineer (in Border Roads Engineering Service)
  10. Mechanical Engineer (in Geological Survey of India)

IES Exam Syllabus for Mechanical Engineering

The IES syllabus for Mechanical Engineering contains two papers - I & II

Paper I


Cycles and IC Engines, Basic concepts, Open and Closed systems. Heat and work. Zeroth, First and Second Law, Application to non-Flow and Flow processes. Entropy, Availability, Irreversibility and Tds relations. Clapeyron and real gas equations, Properties of ideal gases and vapours. Standard vapour, Gas power and Refrigeration cycles. Two stage compressor. C-I and S.I. Engines. Pre-ignition, Detonation and Diesel-knock, Fuel injection and Carburetion, Supercharging. Turboprop and Rocket engines, Engine Cooling, Emission & Control, Fuel gas analysis, Measurement of Calorific values. Conventional and Nuclear fuels, Elements of Nuclear power production.


Modes of heat transfer. One dimensional steady and unsteady conduction. Composite slab and Equivalent Resistance. Heat dissipation from extended surfaces, Heat exchangers, Overall heat transfer coefficient, Empirical correlations for heat transfer in laminar and turbulent flows and for free and forced Convection, Thermal boundary layer over a flat plate. Fundamentals of diffusive and convective mass transfer, Black body and basic concepts in Radiation, Enclosure theory, Shape factor, Network analysis. Heat pump and Refrigeration cycles and systems, Refrigerants. Condensers, Evaporates and Expansion devices, Psychrometry, Charts and application to air conditioning, Sensible heating and cooling, Effective temperature, comfort indices, Load calculations, Solar refrigeration, controls, Duct design.


Properties and classification of fluids, Manometry, forces on immersed surfaces, Center of pressure, Buoyancy, Elements of stability of floating bodies. Kinematics and Dynamics. Irrotational and incompressible. Inviscid flow. Velocity potential, Pressure field and Forces on immersed bodies. Bernoulli's equation, Fully developed flow through pipes, Pressure drop calculations, Measurement of flow rate and Pressure drop. Elements of boundary layer theory, Integral approach, Laminar and turbulent flows, Separations. Flow over weirs and notches. Open channel flow, Hydraulic jump. Dimensionless numbers, Dimensional analysis, Similitude and modelling. One-dimensional isentropic flow, Normal shock wave, Flow through convergent - divergent ducts, Oblique shock-wave, Rayleigh and Fanno lines.


Performance, Operation and control of hydraulic Pump and impulse and reaction Turbines, Specific speed, Classification. Energy transfer, Coupling, Power transmission, Steam generators Firetube and watertube boilers. Flow of steam through Nozzles and Diffusers, Wetness and condensation. Various types of steam and gas Turbines, Velocity diagrams. Partial admission. Reciprocating, Centrifugal and axial flow Compressors, Multistage compression, role of Mach Number, Reheat, Regeneration, Efficiency, Governance.

Paper II


Kinematic and dynamic analysis of planar mechanisms. Cams. Gears and gear trains. Flywheels. Governors. Balancing of rigid rotors and field balancing. Balancing of single and multi cylinder engines, Linear vibration analysis of mechanical systems. Critical speeds and whirling of shafts Automatic controls.


Design of Joints : cotters, keys, splines, welded joints, threaded fasteners, joints formed by interference fits.
Design of friction drives : couplings and clutches, belt and chain drives, power screws.
Design of Power transmission systems : gears and gear drives shaft and axle, wire ropes.
Design of bearings : hydrodynamics bearings and rolling element bearings.


Stress and strain in two dimensions, Principal stresses and strains, Mohr's construction, linear elastic materials, isotropy and anisotropy, stress-strain relations, uniaxial loading, thermal stresses. Beams - Bending moment and shear force diagram, bending stresses and deflection of beams. Shear stress distribution. Torsion of shafts, helical springs. Combined stresses, thick-and thin-walled pressure vessels. Struts and columns. Strain energy concepts and theories of failure.


Basic concepts on structure of solids. Crystalline materials. Defects in crystalline materials. Alloys and binary phase diagrams. Structure and properties of common engineering materials. Heat treatment of steels. Plastics, Ceramics and composite materials. Common applications of various materials.


Metal Forming : Basic Principles of forging, drawing and extrusion; High energy rate forming; Powder metallurgy.
Metal Casting : Die casting, investment casting, Shell Moulding, Centrifugal Casting, Gating & Riser design; melting furnaces.
Fabrication Processes : Principles of Gas, Arc, Shielded arc Welding; Advanced Welding Processes,
Weldability: Metallurgy of Welding.
Metal Cutting : Turning, Methods of Screw Production, Drilling, Boring, Milling, Gear Manufacturing, Production of flat surfaces, Grinding & Finishing Processes.
Computer Controlled Manufacturing Systems-CNC, DNC, FMS, Automation and Robotics.Cutting Tools Materials, Tool Geometry, Mechanism of Tool Wear, Tool Life & Machinability;
Measurement of cutting forces. Economics of Machining. Unconventional Machining Processes.
Jigs and Fixtures. Fits and tolerances, Measurement of surface texture, Comparators Alignment tests and reconditioning of Machine Tools.


Production Planning and Control : Forecasting - Moving average, exponential smoothing, Operations, scheduling; assembly line balancing, Product development, Break-even analysis, Capacity planning, PERT and CPM.
Control Operations : Inventory control ABC analysis, EOQ model, Materials requirement planning. Job design, Job standards, Work measurement, Quality Management - Quality analysis and control.
Operations Research : Linear Programming - Graphical and Simplex methods, Transportation and assignment models. Single server queueing model.
Value Engineering : Value analysis for cost/value.


Computer Organisation, Flow charting, Features of Common computer Languages -FORTRAN, d Base III, Lotus 1-2-3, C and elementary Programming.

How to prepare for IES Mechanical Engineering through AspireBuzz?

The online preparation for IES Mechanical 2020 by VANI Institute in association with AspireBuzz is the best coaching for IES Mechanical which has been designed by top educators from reputed universities and is available in two packages to the IES Aspirants. The IES study material for Mechanical Engineering are meticulously curated by our proficient and well-experienced senior Professors/Lecturers of Vani Institute across the country identifying the critical topics for subjects from IES assessment perspective. Based on their needs or requirement, an aspirant can choose any suitable package:

1.Test Series

This module is designed to help you solve the tests for IES Mechanical preparation and understand the concepts associated with the questions provided. AspireBuzz follows the principle of Stimulation Based Learning, an unique interactive module, where the aim is to stimulate our conceptual analysis and reach to the solution on our own rather than the direct answer approach. Each question in this test series is accompanied by three videos:
Concept Video - Which explains the concept breaking into simpler form.
Hint Video - Which give hints/clues to solve answers.
Solution Video - Which offers an in-depth explanation for easy assimilation.
[Please Note: All the videos are exclusive to Aspirebuzz and VANI Institute and are created by the faculty from premier institutes across the country.]

2.Mock Series

This package is ideal for students who are already preparing for the UES and are looking towards further robust enhancement in the preparation for IES 2020 Mechanical through online preparation mode. The package comes along with multiple questions for the students to perform and solve. Each question is accompanied with a solution. The solutions available are in a relevant text format in this and so does not contain any videos.
You can very well anytime, anywhere register for a free demo/trial package with our learning platform AspireBuzz and let your journey for Online Preparation of IES 2020 Mechanical begin with a bang.

IES books for Mechanical Engineering

The best IES reference books for Mechanical Engineering for thorough preparation are as follows:

  • Engineering Thermodynamics by P.K Nag, Cengel & Boles
  • Industrial Engineering by P Khanna, Ravi Shankar, Buffa & Sarin
  • Material Science by WD Callister, IP Singh & V Raghvan
  • Strength of Materials by Gere & Timoshenko, Sadhu Singh & E.J Hern
  • Machine Design by Shigley & V.B Bhandari
  • Production Engineering by Kalpkjian Schmid, Amitabh Ghosh & A K Malik
  • Mechanical Vibration by Grover
  • Fluid Machinery by Jagdish Lal & R.K.Bansal
  • Heat Mass And Transfer by D.S.Kumar
  • Theory of Machines by RS Khurmi ,S.S Rattan, Malik & Ghosh