UPSC ESE Exam Pattern & Syllabus 2027: Complete Guide

UPSC ESE Exam Pattern and Syllabus 2027: Prelims & Mains

The UPSC ESE Exam Pattern and Syllabus 2027 is an essential resource for candidates preparing for the Engineering Services Examination conducted by the Union Public Service Commission. The examination is conducted for engineering graduates seeking appointment to various engineering services under the Government of India.

For 2027, UPSC has scheduled the Engineering Services Preliminary Examination for 31 January 2027, followed by the Engineering Services Main Examination on 18 June 2027. The examination covers four engineering disciplines: Civil Engineering, Mechanical Engineering, Electrical Engineering, and Electronics & Telecommunication Engineering.

The ESE selection process has three stages: Preliminary Examination, Main Examination and Personality Test. The Preliminary Examination is objective in nature, while the Main Examination consists of conventional engineering papers. UPSC’s previous-question-paper archive also confirms separate Civil, Mechanical, Electrical and Electronics & Telecommunication papers for both the Preliminary and Main examinations.

Candidates should understand the paper structure before beginning preparation because ESE requires preparation for both objective and conventional-answer formats.

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UPSC ESE 2027 Exam Pattern: Overview

The Engineering Services Examination consists of three stages:

Engineering Services Preliminary Examination
Engineering Services Main Examination
Personality Test

The written examinations together carry 1,100 marks, while the Personality Test carries 200 marks.

Stage	Papers	Marks	Nature
Preliminary	Paper I + Paper II	500	Objective
Main	Paper I + Paper II	600	Conventional
Personality Test	Interview	200	Personality/Assessment
Total		1,300

The Preliminary Examination is used to shortlist candidates for the Main Examination. The marks obtained in the Main Examination and Personality Test are important for final ranking, subject to the rules prescribed by UPSC.

UPSC ESE Prelims Exam Pattern 2027

The ESE Preliminary Examination consists of two objective papers.

Paper	Subject	Duration	Marks
Paper I	General Studies and Engineering Aptitude	2 Hours	200
Paper II	Engineering Discipline	3 Hours	300
Total		5 Hours	500

Paper I is common to candidates from all four engineering disciplines.

Paper II is based on the engineering discipline selected by the candidate:

Civil Engineering
Mechanical Engineering
Electrical Engineering
Electronics & Telecommunication Engineering

Thus, the Preliminary Examination carries 500 marks in total.

Paper I: General Studies and Engineering Aptitude

Paper I carries 200 marks and tests general engineering awareness, engineering aptitude and related subjects.

The syllabus contains ten broad areas, with questions distributed across these areas rather than being restricted to a single conventional general-awareness subject. The UPSC syllabus specifies that questions can be asked from all ten areas, with the marks assigned to individual areas generally ranging from 5% to 15%.

Paper II: Engineering Discipline

Paper II carries 300 marks and tests the candidate’s professional engineering knowledge.

The candidate answers questions from the engineering category selected during the application process.

UPSC ESE Negative Marking

Negative marking applies to the objective papers of the Preliminary Examination.

For an incorrect answer, one-third of the marks assigned to that question is deducted.

If a candidate marks more than one option for a question, the response is treated as an incorrect answer.

No penalty is imposed for a question left unanswered.

Candidates should therefore avoid making random guesses, particularly when they cannot eliminate incorrect options with reasonable confidence.

UPSC ESE Main Exam Pattern 2027

Candidates who qualify in the Preliminary Examination are called for the Engineering Services Main Examination.

The Main Examination consists of two conventional engineering papers, each carrying 300 marks.

Paper	Subject	Duration	Marks
Paper I	Engineering Discipline	3 Hours	300
Paper II	Engineering Discipline	3 Hours	300
Total		6 Hours	600

The Main Examination is significantly different from the Preliminary Examination because candidates are required to provide conventional/descriptive answers rather than simply selecting an option.

The official UPSC question-paper archive lists separate Paper I and Paper II examinations for Civil, Mechanical, Electrical and Electronics & Telecommunication Engineering.

UPSC ESE Personality Test

Candidates who qualify through the written stages are called for the Personality Test.

The Personality Test carries 200 marks.

The purpose of this stage is to assess the candidate beyond purely technical knowledge. Candidates may be assessed on qualities relevant to public service and the responsibilities associated with engineering services.

The final selection is made according to the applicable UPSC rules, including written examination performance, Personality Test marks, service preferences, vacancies and other prescribed conditions.

UPSC ESE Syllabus 2027

The ESE syllabus can be broadly divided into:

General Studies and Engineering Aptitude
Civil Engineering
Mechanical Engineering
Electrical Engineering
Electronics & Telecommunication Engineering

Candidates select one engineering discipline for the professional papers.

UPSC ESE General Studies and Engineering Aptitude Syllabus

The common Paper I covers the following ten major areas.

1. Current Issues of National and International Importance

Questions may cover current issues related to:

Social development
Economic development
Industrial development
Science and technology
Engineering-related developments
Major national and international developments

Candidates should understand the engineering and technological dimensions of important current affairs rather than preparing current affairs as a completely separate general-knowledge subject.

2. Engineering Aptitude

This section tests:

Logical reasoning
Analytical ability
Engineering aptitude
Problem-solving ability
Basic engineering decision-making

The questions are designed around the level of knowledge expected from an engineering graduate.

3. Engineering Mathematics and Numerical Analysis

Important areas include:

Mathematical fundamentals
Numerical methods
Approximation
Numerical solutions
Engineering-oriented mathematical applications
Computational methods

Candidates should focus on concepts as well as their practical application.

4. General Principles of Design and Drawing

This section covers basic concepts related to:

Engineering design
Engineering drawings
Design principles
Interpretation of drawings
Safety considerations
Engineering standards

5. Standards and Quality Practices

Important areas include:

Quality control
Quality assurance
Engineering standards
Production quality
Construction quality
Maintenance practices
Service quality

6. Energy and Environment

This section covers:

Energy conservation
Environmental pollution
Environmental degradation
Climate change
Environmental impact assessment
Sustainable engineering practices

7. Project Management

Candidates should understand basic project-management concepts such as:

Project planning
Scheduling
Resource management
Cost considerations
Project monitoring
Risk management
Project execution

8. Material Science and Engineering

The syllabus includes fundamental concepts related to:

Engineering materials
Material properties
Material selection
Applications of engineering materials
Basic material science

9. Information and Communication Technologies

Important areas include:

ICT applications in engineering
Networking
E-governance
Technology-based education
Digital tools
Information systems
Engineering applications of ICT

10. Engineering Ethics and Values

This section focuses on:

Professional ethics
Engineering values
Responsibilities of engineers
Ethical decision-making
Public safety
Professional conduct

UPSC’s published ESE syllabus identifies these ten areas for the General Studies and Engineering Aptitude paper and states that all ten areas are represented in the question paper.

UPSC ESE Civil Engineering Syllabus 2027

Civil Engineering candidates need to prepare a broad range of subjects covering structural, construction, geotechnical, transportation, environmental and water-resource engineering.

The official UPSC syllabus groups the Civil Engineering content into detailed engineering topics for the Preliminary and Main examinations.

1. Building Materials

Important topics include:

Stone
Lime
Glass
Plastics
Steel
Fibre-reinforced plastics
Ceramics
Aluminium
Fly ash
Admixtures
Timber
Bricks
Aggregates
Cement
Mortars
Concrete
Concrete tests
Concrete mix design

Candidates should understand properties, classification, applications, specifications and testing of construction materials.

2. Solid Mechanics

Important areas include:

Stress and strain
Elastic constants
Plane stress
Plane strain
Mohr’s circle
Principal stresses
Elastic theories of failure
Bending
Shear
Torsion

3. Structural Analysis

Preparation should cover:

Structural systems
Determinate and indeterminate structures
Bending moment
Shear force
Deflection
Analysis of beams
Analysis of frames
Analysis of trusses
Influence lines
Structural methods of analysis

4. Design of Steel Structures

Major topics include:

Structural steel
Connections
Riveted and bolted connections
Welded connections
Tension members
Compression members
Beams
Columns
Structural design principles

5. Design of Concrete and Masonry Structures

Important topics include:

Reinforced concrete
Limit-state design
Working-stress concepts
Beams
Slabs
Columns
Foundations
Retaining structures
Masonry structures

6. Construction Practice and Management

Topics include:

Construction planning
Construction equipment
Construction methods
Project scheduling
Resource management
Cost management
Quality control
Construction safety
Contracts
Project management

7. Fluid Mechanics

Important topics include:

Fluid properties
Fluid statics
Fluid kinematics
Fluid dynamics
Flow through pipes
Open-channel flow
Dimensional analysis
Hydraulic machines
Boundary-layer concepts

8. Hydrology and Water Resources

Preparation should include:

Hydrological cycle
Rainfall
Runoff
Evaporation
Groundwater
Irrigation
Water-resource planning
Reservoirs
Dams
Water-management systems

9. Environmental Engineering

Important areas include:

Water supply
Water treatment
Wastewater treatment
Sewerage
Air pollution
Solid waste management
Environmental pollution
Environmental protection

10. Geotechnical Engineering

Important topics include:

Soil properties
Soil classification
Permeability
Seepage
Consolidation
Shear strength
Earth pressure
Bearing capacity
Foundations
Slope stability

11. Transportation Engineering

The syllabus includes:

Highway engineering
Pavement materials
Pavement design
Traffic engineering
Railway engineering
Airport engineering
Transportation planning

The exact topic coverage should always be checked against the current UPSC notification because UPSC’s detailed syllabus is the controlling document.

UPSC ESE Mechanical Engineering Syllabus 2027

Mechanical Engineering candidates should prepare the following major areas.

1. Engineering Mechanics

Topics include:

Statics
Dynamics
Force systems
Equilibrium
Friction
Work and energy
Momentum
Kinematics
Kinetics

2. Strength of Materials

Important topics include:

Stress
Strain
Elasticity
Bending
Shear
Torsion
Columns
Failure theories
Principal stresses

3. Theory of Machines

Preparation should cover:

Kinematics of machines
Mechanisms
Velocity and acceleration
Gears
Gear trains
Governors
Flywheels
Balancing
Vibrations

4. Machine Design

Major topics include:

Design principles
Machine elements
Shafts
Bearings
Couplings
Gears
Springs
Fasteners
Failure theories

5. Thermodynamics

Important areas include:

Laws of thermodynamics
Properties of gases and vapours
Thermodynamic cycles
Entropy
Energy conversion
Gas power cycles
Vapour power cycles

6. Heat Transfer

Topics include:

Conduction
Convection
Radiation
Heat exchangers
Thermal systems
Heat-transfer equipment

7. Fluid Mechanics and Hydraulic Machines

Important areas include:

Fluid properties
Fluid statics
Fluid dynamics
Pipe flow
Boundary layer
Pumps
Turbines
Hydraulic systems

8. IC Engines

Preparation should cover:

SI engines
CI engines
Engine cycles
Combustion
Engine performance
Fuel systems
Cooling
Lubrication
Emission control

9. Refrigeration and Air Conditioning

Important topics include:

Refrigeration cycles
Refrigerants
Vapour-compression systems
Absorption refrigeration
Psychrometry
Air-conditioning systems
Cooling loads

10. Manufacturing Engineering

Topics include:

Casting
Welding
Machining
Forming
Metal cutting
Machine tools
Production processes
Metrology
Manufacturing systems

UPSC ESE Electrical Engineering Syllabus 2027

Electrical Engineering preparation covers core electrical engineering principles and their applications.

1. Electrical Circuits

Important topics include:

Circuit laws
Network analysis
AC circuits
DC circuits
Network theorems
Transient analysis
Resonance
Two-port networks

2. Electrical and Electronic Measurements

Candidates should study:

Measurement principles
Measuring instruments
Errors
Instrument transformers
Digital measurements
Electrical measurement systems

3. Electrical Machines

Important topics include:

Transformers
DC machines
Induction machines
Synchronous machines
Special machines
Machine characteristics
Starting and control

4. Power Systems

Major topics include:

Power generation
Transmission
Distribution
Power-system analysis
Fault analysis
Protection
Switchgear
Stability
Load flow

5. Control Systems

Preparation should include:

System modelling
Transfer functions
Block diagrams
Signal-flow graphs
Time response
Frequency response
Stability
Controllers
State-space analysis

6. Power Electronics

Important areas include:

Power semiconductor devices
Rectifiers
Inverters
Choppers
AC controllers
Converters
Power-electronic applications

7. Analog and Digital Electronics

Topics include:

Semiconductor devices
Amplifiers
Oscillators
Digital logic
Combinational circuits
Sequential circuits
Digital systems

8. Electrical Materials

Candidates should understand:

Conducting materials
Magnetic materials
Dielectric materials
Semiconductor materials
Insulating materials

UPSC ESE Electronics & Telecommunication Engineering Syllabus 2027

Electronics and Telecommunication Engineering candidates need to prepare subjects covering electronic devices, communication, digital systems, networks, signals and control.

1. Electronic Devices and Circuits

Important areas include:

Semiconductor physics
Diodes
Transistors
Field-effect transistors
Amplifiers
Oscillators
Feedback
Integrated circuits

2. Digital Electronics

Topics include:

Number systems
Boolean algebra
Logic gates
Combinational circuits
Sequential circuits
Flip-flops
Counters
Registers
Digital systems

3. Network Theory

Important topics include:

Network laws
Network theorems
Circuit analysis
Transient response
Frequency response
Resonance
Two-port networks

4. Signals and Systems

Candidates should cover:

Continuous-time signals
Discrete-time signals
Linear systems
Time-domain analysis
Frequency-domain analysis
Fourier analysis
Laplace transforms
Z-transforms

5. Communication Systems

Major topics include:

Analog communication
Digital communication
Modulation
Demodulation
Noise
Information theory
Transmission systems
Communication channels

6. Electromagnetic Theory

Important areas include:

Electric fields
Magnetic fields
Maxwell’s equations
Electromagnetic waves
Wave propagation
Transmission lines
Waveguides
Antennas

7. Microwave Engineering

Topics include:

Microwave components
Microwave tubes
Solid-state microwave devices
Waveguides
Microwave measurements
Radar fundamentals

8. Computer and Microprocessor Systems

Preparation should include:

Microprocessors
Microcontrollers
Computer architecture
Memory systems
Input/output systems
Interfacing
Embedded systems

9. Control Systems

Important areas include:

Mathematical modelling
Transfer functions
Feedback systems
Stability
Frequency response
Controllers
State-space methods

UPSC ESE Syllabus: Paper-Wise Preparation Structure

A practical way to organise the syllabus is to divide preparation into three layers.

Layer 1: Common Paper

All candidates should prepare:

General Studies + Engineering Aptitude

This is the only major common technical-awareness paper before the discipline-specific papers.

Layer 2: Discipline-Specific Objective Paper

Candidates then prepare their selected engineering branch for the 300-mark Preliminary Paper II.

Layer 3: Conventional Engineering Papers

The same broad engineering discipline must then be prepared at a considerably deeper level for the two 300-mark Main Examination papers.

This means candidates should not prepare the Preliminary Paper II and Main Examination as completely separate syllabi. A better approach is to build strong conceptual knowledge first and then develop speed for objective questions and answer-writing ability for conventional papers.

UPSC ESE 2027 Prelims vs Mains

Feature	Prelims	Mains
Type	Objective	Conventional
Number of Papers	2	2
General Studies	Yes	No
Engineering Paper	Yes	Yes
Total Marks	500	600
Engineering Questions	Objective	Descriptive
Negative Marking	Yes	Not applicable in conventional format
Purpose	Shortlisting	Written merit stage

The distinction is important because a candidate who prepares only through multiple-choice questions may find the conventional Main Examination format considerably different.

How to Prepare for UPSC ESE 2027 Syllabus

Start With the Official Syllabus

Before choosing books or joining a test series, download the latest UPSC syllabus and map each topic against your engineering curriculum.

The UPSC website provides examination information, previous question papers and syllabus-related resources.

Build Core Engineering Concepts

ESE is not simply a current-affairs examination with engineering questions added to it. The discipline-specific papers cover substantial undergraduate engineering content.

Begin with fundamental concepts and gradually move toward numerical problems and advanced applications.

Use Previous Year Papers

Previous papers are particularly useful because they show:

Question style
Difficulty level
Repeated concepts
Numerical orientation
Topic distribution
Time pressure

UPSC’s official previous-question-paper repository currently provides ESE papers for Civil, Mechanical, Electrical and Electronics & Telecommunication Engineering, including the 2026 examination.

Prepare for Objective and Conventional Questions Together

Do not wait until after Prelims to think about Mains.

For each major engineering topic:

Learn the concept.
Solve numerical problems.
Practice objective questions.
Review previous ESE questions.
Write conventional solutions.
Revise formulas and key concepts.

This approach reduces the need to rebuild the entire subject after the Preliminary Examination.

UPSC ESE 2027 Important Books and Study Material

Candidates can build their preparation around four categories of resources:

Engineering Textbooks

Use standard undergraduate engineering textbooks for conceptual clarity.

Previous Year Papers

Solve official ESE papers from multiple years and analyse them topic-wise.

Formula and Revision Notes

Maintain compact notes for:

Important formulas
Shortcuts
Definitions
Standards
Common mistakes
Frequently tested concepts

Mock Tests

Use full-length tests after completing sufficient portions of the syllabus.

Mock tests should not be used merely to generate scores. They should help identify weak chapters, calculation errors and time-management problems.

UPSC ESE 2027 Exam Preparation Strategy

A sensible preparation cycle can be divided into four phases.

Phase 1: Syllabus Mapping

Break your engineering syllabus into chapters and mark each topic as:

Strong
Average
Weak

This creates a realistic preparation map.

Phase 2: Concept Building

Complete one subject at a time and focus on understanding rather than memorising isolated formulas.

Phase 3: Previous-Year Questions

After completing a topic, solve relevant ESE questions from previous years.

This reveals whether the concept has actually become usable under examination conditions.

Phase 4: Revision and Mock Tests

Use the final phase for:

Full-length tests
Formula revision
Previous-paper revision
Error analysis
Time management
Weak-topic revision

UPSC ESE 2027 Exam Date

According to the currently published 2027 examination schedule, the Engineering Services Preliminary Examination is scheduled for 31 January 2027, while the Engineering Services Main Examination is scheduled for 18 June 2027.

Candidates should continue checking the UPSC website for any subsequent timetable, admit-card or examination-related updates.

UPSC ESE 2027 Previous Year Question Papers

Previous-year papers should form an important part of ESE preparation.

UPSC’s official repository currently lists:

ESE Preliminary General Studies and Engineering Aptitude: Check Here
Civil Engineering – Check Here
Mechanical Engineering – Check Here
Electrical Engineering – Check Here
Electronics & Telecommunication Engineering – Check Here
ESE Main Civil Engineering Paper I and II – Paper – I || Paper – II
ESE Main Mechanical Engineering Paper I and II – Paper – I || Paper – II
ESE Main Electrical Engineering Paper I and II – Paper – I || Paper – II
ESE Main Electronics & Telecommunication Engineering Paper I and II – Paper – I || Paper – II

The official repository provides these papers for recent examinations, including 2026 and 2025.

UPSC ESE 2027 Exam Pattern and Syllabus: Quick Summary

Particular	Details
Exam Name	Engineering Services Examination 2027
Conducting Body	UPSC
Prelims	500 Marks
Mains	600 Marks
Personality Test	200 Marks
Total	1,300 Marks
Prelims Paper I	General Studies & Engineering Aptitude
Prelims Paper II	Engineering Discipline
Engineering Categories	Civil, Mechanical, Electrical, Electronics & Telecommunication
Prelims Type	Objective
Mains Type	Conventional
Negative Marking	Yes, in objective papers
Prelims Date	31 January 2027
Mains Date	18 June 2027

Frequently Asked Questions

What is the UPSC ESE exam pattern for 2027?
UPSC ESE 2027 has three stages: Preliminary Examination, Main Examination and Personality Test. Prelims carries 500 marks, Mains carries 600 marks and the Personality Test carries 200 marks.
How many papers are there in UPSC ESE Prelims?
There are two papers. Paper I is General Studies and Engineering Aptitude for 200 marks, while Paper II is the selected engineering discipline for 300 marks.
How many marks is UPSC ESE Mains?
The Main Examination carries 600 marks, consisting of two conventional engineering papers of 300 marks each.
Is UPSC ESE objective or descriptive?
The Preliminary Examination is objective, while the Main Examination is conventional/descriptive.
Which engineering branches are included in UPSC ESE 2027?
The four engineering categories are Civil Engineering, Mechanical Engineering, Electrical Engineering, and Electronics & Telecommunication Engineering.
Is there negative marking in UPSC ESE?
Yes. Negative marking applies to incorrect answers in the objective papers. One-third of the marks assigned to the question is deducted for an incorrect response.
What is the syllabus for UPSC ESE Paper I?
Paper I covers ten broad areas including current issues, engineering aptitude, engineering mathematics and numerical analysis, design and drawing, standards and quality, energy and environment, project management, material science, ICT and engineering ethics.
Where can I find official UPSC ESE previous-year papers?
UPSC publishes previous question papers on its official website. The current repository includes ESE Preliminary and Main papers for the major engineering disciplines.
When is the UPSC ESE 2027 Preliminary Examination?
The UPSC ESE 2027 Preliminary Examination is scheduled for 31 January 2027.
When is the UPSC ESE 2027 Main Examination?
The Engineering Services Main Examination is scheduled for 18 June 2027.

The UPSC ESE Exam Pattern and Syllabus 2027 combines a common General Studies and Engineering Aptitude paper with a substantial discipline-specific engineering syllabus. Candidates must prepare for both objective questions in the Preliminary Examination and conventional descriptive papers in the Main Examination.

The biggest preparation mistake is treating ESE as only a multiple-choice technical examination. The Preliminary stage tests breadth and speed, while the Main Examination requires candidates to demonstrate their engineering knowledge through conventional answers and calculations.

Candidates should therefore begin with the official syllabus, build strong engineering fundamentals, solve previous-year papers, practise objective questions and gradually introduce conventional answer writing.

For the latest examination notices, question papers and official updates, candidates should rely on the Union Public Service Commission’s official website rather than unofficial summaries. UPSC maintains the official examination portal and its previous-question-paper repository.