IES Syllabus 2021

IES Syllabus

One of the most sought-after exams, Indian Engineering Services is conducted annually by UPSC. IES Syllabus is divided as per Civil, Mechanical, Electrical and Electronics and Telecommunications branch. IES is considered one of the toughest exams in India with around 2 lakh applicants applying for a limited number of posts. The fame and luxury associated with the posts are unmatched as the professionals after the exam are likely to handle the top positions in the government while leading the technical team. In this blog, we will have a look at the IES syllabus.

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What is the IES Exam?

Indian Engineering Services or the Engineering Service Examination is an exam conducted for engineers who wish to work under government related services. The career of a Government Engineer entails them to understand and head projects in their own field of work. A Government engineer can start from Assistant Engineer position and can go to Chairman/ Director level/ 

IES Exam Highlights

Exam Engineering Services Exam
Conducted By Union Public Services Exam 
Exam Frequency Once a year
Exam Level National Level
No. of Vacancies 495
Age Limit 21-30 years
Selection Process Preliminary Round, Exam, Interview
Application Fees INR 200
Official Website

IES Syllabus 2021

The syllabus for the paper-I of stage-I is common for all branches but it varies greatly for other papers. Given below is the syllabus for all four Engineering branches:

IES Syllabus for Civil Engineering

Paper-I Paper-II
1. Building Materials  1. Flow of Fluids, Hydraulic Machines and Hydropower
Plastics, Steel, Stone, Lime, Glass, FRP, Ceramics, Basic Admixtures and Aggregates: Classification, Cement: Types, Composition, Properties, Uses, Specifications and Various Tests, etc (a) Fluid Properties, Dimensional Analysis and Modeling, Fluid Dynamics, Flow Net, Viscosity, Boundary Layer and Control, Open Channel Flow, Flow Controls, etc.

(b) Hydraulic Machines and Hydropower – Various Pumps, Powerhouse – Classification and Layout, Storage, Pondage, Control of Supply, etc

2. Solid Mechanics 2. Hydrology and Water Resources Engineering
Elastic Constants, Mohr’s Circle of Stress and Strain, Elastic Theories of Failure, Stress, Strains, Bending, Shear and Torsion. Hydrological Cycle, Ground Water Hydrology, Well Hydrology River Morphology, Flood, Drought and their Management, Canal Design, Measurement and Analysis of Rainfall, etc. 
3. Structural Analysis 3. Environmental Engineering
Basics of Strength of Materials, Types of Stresses and Strains, Bending Moments and Shear Force, Concept of Bending and Shear Stresses, Suspended Cables, Concepts and Use of Computer-aided Design, etc. (a) Water Supply Engineering: Sources, Estimation, Quality Standards and Testing of Water and Their Treatment.

(b) Waste Water Engineering: Planning & Design of Domestic Wastewater, Sewage Collection and Disposal, Plumbing Systems, etc.

(c) Solid Waste Management: Sources & Classification of Solid Wastes Along with Planning & Design of Its Management System.

(d) Air, Noise Pollution and Ecology: Concepts & General Methodology.

4. Design of Steel Structures 4. Geotechnical Engineering and Foundation Engineering
Principles of Working Stress Methods, Design of Tension and Compression Members, Design of Beams and Beam-column Connections, Built-up Sections, etc (a) Geo-technical Engineering: Soil Exploration – Planning & Methods, Properties of Soil, Classification, Earth Pressure Theories, Properties and Uses of Geo-synthetics.

(b) Foundation Engineering: Types of Foundations & Selection Criteria, Bearing Capacity, Settlement Analysis, Design and Testing of Shallow & Deep Foundations.

5. Design of Concrete and Masonry Structures 5. Surveying and Geology
Limit State Design for Bending, Shear, Axial Compression and Combined Forces; Design of Beams, Earthquake Resistant Design of Structures, Design of Masonry Structure, etc (a) Surveying: Classification of Surveys, Various Methodologies, Instruments & Analysis of Measurement of Distances, Elevation and Directions, etc.

(b) Geology: Basic Knowledge of Engineering Geology & Its Application in Projects.

6. Construction Practice, Planning and Management 6. Transportation Engineering
Construction – Planning, Equipment, Site Investigation and Management Including Estimation with Latest Project Management Tools and Network Analysis for Different Types of Works, etc. Highways – Planning & Construction Methodology, Alignment and Geometric Design, Traffic Surveys and Controls; Principles of Flexible and Rigid Pavements Design, Tunnelling, etc

IES Syllabus for Mechanical Engineering

Paper-I Paper-II
1. Fluid Mechanics 1. Engineering Mechanics
Basic Concepts and Properties of Fluids, Manometry, Fluid Statics, Buoyancy, Equations of Motion, Bernoulli’s equation and applications, etc. Analysis of System of Forces, Friction, Centroid and Centre of Gravity, Dynamics, Stresses and Strains-Compound Stresses and Strains, etc
2. Thermodynamics and Heat transfer 2. Engineering Materials
Thermodynamic Systems and Processes,  Properties of Pure Substance, Ideal and Real Gases, Compressibility Factor, Gas Mixtures, Modes of Heat Transfer, etc Basic Crystallography, Alloys and Phase Diagrams, Heat Treatment, Ferrous and Non-Ferrous Metals, Non-metallic Materials etc.
3. IC Engines, Refrigeration and Air conditioning 3. Mechanisms and Machines
SI and CI Engines, Engine Systems and Components, Thermo Electric and Vortex Tube Refrigeration, Psychometric Properties and Processes, etc Types of Kinematics Pair, CAMs Cycloidal Motion, Oscillating Followers, Vibrations, Geometry of Tooth Profiles, Law of Gearing, Gyroscopes in Ships and Aircraft, Governors.
4. Turbo Machinery 4. Design of Machine Elements
Reciprocating and Rotary pumps, Pelton wheel, Kaplan and Francis Turbines, Steam and Gas Turbines, Theory of Jet Propulsion, etc Design for Static and Dynamic Loading, Failure Theories, S-N Diagram; Principles of the Design of Machine Elements, etc.
5. Power Plant Engineering 5. Manufacturing, Industrial and Maintenance Engineering
Rankine and Brayton Cycles with Regeneration and Reheat, Fuels and their Properties, Flue Gas Analysis, Boilers, Steam Turbines and other Power Plant Components, etc Metal Casting-Metal Forming, Metrology and Inspection, Computer Integrated Manufacturing, Operations Research – CPM-PERT. NDT Techniques in Condition Monitoring, etc

6. Renewable Sources of Energy 6. Mechatronics and Robotics
Solar Thermal Energy Collection, Solar Photovoltaic Conversion; Harnessing of Wind Energy, Bio-mass and Tidal Energy, etc Microprocessors and Microcontrollers: Architecture, Programming, I/O, Mathematical Modeling of Physical Systems, Control Signals, Controllability and Observability. Robotics, Equation of Four Axis Scara Robot,  etc.

IES Syllabus for Electrical Engineering

Paper-I Paper-II
1. Engineering Mathematics 1. Analog and Digital Electronics
Matrix Theory, Eigen Values & Eigen Vectors, System of Linear Equations, Numerical Methods for Solution of Non-linear Algebraic Equations, etc Operational Amplifiers – Characteristics and Applications, Combinational and Sequential Logic Circuits, Multiplexers, Multi-vibrators, Microprocessor Basics, Basics of Linear Integrated Circuits, etc
2. Electrical Materials 2. Systems and Signal Processing
Electrical Engineering Materials, Crystal, Ceramic Materials, Insulating Materials, Photo-conductivity; Basics of Nano Materials and Superconductors, etc Representation of Continuous and Discrete-time Signals, Shifting and Scaling Operations, Linear, Time-invariant and Causal Systems, Fourier Series, etc
3. Electric Circuits and Fields 3. Control Systems
Circuit Elements, Network Graph, KCL, KVL, Thevenin’s, Norton’s, Superposition, Maximum Power Transfer Biot-Savart’s Laws, Maxwell’s Equations, etc Principles of Feedback, Transfer Function, Block Diagrams and Signal Flow Graphs, Steady-state Errors, Routh-Hurwitz Criterion, Nyquist Techniques
4. Electrical and Electronic Measurements 4. Electrical Machines
Principles of Measurement, Bridges and Potentiometers; Moving Coil, Dynamometer and Induction Type Instruments, Measurement of Voltage, etc Single Phase Transformers, Three Phase Transformers, Generator Characteristics, Armature Reaction and Commutation, etc
5. Computer Fundamentals 5. Power Systems
Number Systems, Boolean Algebra, Arithmetic Functions, Basic Architecture, Central Processing Unit, I/O, Networking, Elements of Programming Languages, Etc. Basic Power Generation Concepts, Steam, Gas and Water Turbines, Transmission Line Models and Performance, Cable Performance, Insulation, etc
6. Basic Electronics Engineering 6. Power Electronics and Drives
Basics of Semiconductor Diodes and Transistors, Different Types of Transistor Amplifiers, Equivalent Circuits and Frequency Response, etc Semiconductor Power Diodes, Transistors, Thyristors, Triacs, GTOs, Mosfets and IGBTS, Principles of Choppers and Inverters, 

IES Syllabus for Electronics and Telecommunications Engineering

Paper-I Paper-II
1. Basic Electronics Engineering: 1. Analog and Digital Communication Systems
Basics of Semiconductors; Diode/Transistor Basics and Characteristics, Diodes for Different Uses, Junction & Field Effect Transistors (BJTs, JFETs, MOSFETs), etc Random Signals, Noise, Probability Theory, Information Theory, PCM, DPCM, Multiplexing-Audio/Video; Digital Modulation
2. Basic Electrical Engineering 2. Control Systems
DC Circuits-OHM’s & Kirchoff’s Laws, Mesh and Nodal Analysis, Circuit Theorems; Electromagnetism, Faraday’s & Lenz’s Laws Classification of Signals and Systems, Application of Signal and System Theory, System Realization, Transforms& their Applications; Signal Flow Graphs, Routh-Hurwitz Criteria, Root Loci, Nyquist/bode Plots; 
3. Materials Science 3. Computer Organization and Architecture
Electrical Engineering materials; Crystal Structure & Defects; Ceramic Materials-Structures, Composites, Processing and Uses, etc Basic Architecture, CPU, I/O Organisation, Memory Organisation, Peripheral Devices, Trends; Hardware/Software Issues; Data Representation& Programming; Operating Systems-basics, Etc
4. Electronic Measurements and Instrumentation 4. Electro-magnetics
Principles of Measurement, Accuracy, precision and standards; Analog and Digital Systems for Measurement, Measurement Systems for Non-Electrical Quantities; Basics of Telemetry; Different Types of Transducers, etc Elements of Vector Calculus, Maxwell’s Equations-basic Concepts; Gauss’, Stokes’ Theorems; Wave Propagation Through Different Media; Transmission Lines-different Types, etc
5. Network Theory 5. Advanced Electronics
Network Graphs & Matrices; Wye-Delta Transformation; Linear Constant Coefficient Differential Equations- Time-Domain Analysis of RLC Circuits, Etc Vlsi Technology: Processing, Lithography, Interconnects, Packaging, Testing; VLSI Design: Principles, MUX/ROM/PLA-based Design, Moore & Mealy Circuit Design; Pipeline Concepts & Functions; 
6.Analog and Digital Circuits 6. Advanced Communication
BJTs and FETs; Diode Circuits for different uses; Biasing & stability of BJT & JFET amplifier circuits; Analysis/Design of Amplifier- Single/Multi-stage; Communication Networks: Principles /Practices /Technologies/Uses/OSI Model/Security; Basic Packet Multiplexed Streams/Scheduling; Cellular Networks, Types, Analysis, Protocols (TCP/TCPIP); Microwave & Satellite Communication

IES Exam Pattern 

Before proceeding with the IES syllabus, let us have a look at the exam pattern of this toughest exam in the world. The IES exam is conducted in three stages — Preliminary, Mains and Personality Test. To be qualified for the post, the candidate has to clear all three stages. 

IES Preliminary: Stage-I

The first stage of the exam, also known as preliminary exam consists of two papers — Paper-I and Paper-II. Both papers have objective type questions. The Paper-I, which carries 200 marks, covers questions on General Studies and Engineering Aptitude. The allotted time for the paper is 2 hours.  Paper-II covers a diverse range of topics from Engineering discipline. The paper carries 300 marks and the time duration is 3 hours. The candidates who qualify the Stage-I are cleared for the next stage. The selection process is solely at the discretion of the evaluating authority. 

IES Mains: Stage-II

The second stage of the IES exam, also known as the mains exam has two papers—Paper-I and Paper-II. Both the papers are conventional in nature which means that the questions asked are descriptive. The IES syllabus for both the papers consists of topics from the Engineering branches mentioned above. Time management is crucial in this stage as the questions demand a great level of attention and detail. Each paper in this stage carries 300 marks to be covered in 3 hours.   

IES Interview Stage-III

The final stage of the exam known as personal interview carries 200 marks. The interview is conducted by the UPSC experts who test your subjective knowledge and aptitude for the post. Besides, the interviewers review your application on various parameters which include leadership, confidence, etc. 

Indian Engineering Services Exam 2021

IES Exam 2021 will be conducted by UPSC and will be held as per the following schedule:

Date Event
IES Notification 2021 First Week of April 2021
Online Application First Week of April 2021
Last date of application Last Week of April 2021
Preliminary Exam  July, 2021
Preliminary Exam Result September 2021
Main Exam Date October 2021
Main Exam Result November 2021
Interview December 2021
Result January 2021

IES Salary

After qualifying for the IES exam, you will be positioned as Assistant Executive Engineer. Your position will increase with time and so will your salary. Since the 7th pay commission’s introduction, the salary for IES has increased. Here are position divisions for IES. 

These salaries are exclusive of  the following:

  1. Dearness Allowance (125% of Basic Scale)
  2. House Rent Allowance (10-30% of Basic Scale) [Depending on location]
  3. Transport Allowance (15% of Basic Pay + Dearness Allowance)
  4. Deduction of Income Tax, Provident Fund, Professional Tax, Gratuity, and Central Government employees group insurance scheme.
Level Basic Pay Scale Grade Pay
Junior Level INR 15,600- INR 39,100 INR 5400
Senior Level INR 15,600 – INR 39,100 INR 6600
Junior Administrator Grade INR 15,600 – INR 39,100 INR 7600
Senior Administrator Grade INR 37400 – INR 67000 INR 8700
High Administrator Grade INR 37400 – INR 67000 INR 8700
Cabinet Secretary Grade INR 90,000
Apex Scale INR 80,000


What are the subjects in IES?

The IES subjects are mainly from four main Engineering branches, i.e.
-Mechanical Engineering
-Electrical Engineering
-Electronics and Telecommunication Engineering
-Civil Engineering
-General Studies & Engineering Aptitude

Is Gate and IES syllabus same?

The syllabus for IES and GATE is quite similar in terms of the major subjects covered. But GATE mainly focuses on a wider range of Engineering subjects and interdisciplinary topics while the IES syllabus is limited to the four main Engineering Branches of Electrical, Mechanical, Civil, Electronics and Telecommunication Engineering along with General Studies and Engineering Aptitude.

Which branch is best for IES?

There is no specific branch that one can choose for IES but there are five main Engineering branches that you need to study for and these are: Civil Engineering, Electrical Engineering, Mechanical Engineering, Electronics and Telecommunication Engineering.

Who can apply for IES?

Though there are detailed eligibility requirements for IES, the basic general requirements are:
-The applicant must be a citizen of India, Nepal or Bhutan or Tibetan refugees can also apply for this exam.
-You must have completed a bachelor’s degree in Engineering from a recognized academic institution.
-The age limit for IES exam is 21-30 years as on 1st January 2020.
Read the detailed eligibility criteria for IES at Indian Engineering Services (IES)!

IES syllabus is crucial for the understanding of the exam. With a strategic study plan, you can ace the exam. If you need more assistance with any education and career-related queries, let Leverage Edu help you.

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