I. Civil Engineering (for both objective and conventional type papers)
Paper I

1.  Building Materials
2. Solid Mechanics
3.  Structural Analysis
4.  Design of Steel Structures
5.  Design of Concrete and Masonry Structures
6.  Construction Practice, Planning and Management

Paper-II

1. (a) Fluid Mechanics, Open Channel, Flow, Pipe Flow
(b) Hydraulic Machines and Hydropower

2. (a) Hydrology
(b) Water Resources Engineering

Environmental Engineering

3. (a) Water Supply Engineering
(b) Waste Water Engineering
(c) Solid Waste Management
(d) Air and Noise Pollution and Ecology

4. (a) Geo-technical Engineering
(b) Foundation Engineering

5. (a) Surveying and Geology
(b) Transportation Engineering

II. UPSC ESE Syllabus 2021: Mechanical Engineering (For both objective and conventional type papers)

Paper I

1. Fluid Mechanics
2. Thermodynamics and Heat transfer
3. IC Engines, Refrigeration, and Air conditioning
4. Turbo Machinery
5. Power Plant Engineering
6. Renewable Sources of Energy

Paper-II

1. Engineering Mechanics
2. Mechanisms and Machines
3. Design of Machine Elements
4. Manufacturing, Industrial, and Maintenance Engineering
5. Mechatronics and Robotics

UPSC ESE Syllabus 2021: Electrical Engineering (for both objective and conventional type papers)

Paper I

1. Engineering Mathematics
2. Electrical Materials
3. Electric Circuits and Fields
4. Electrical and Electronic Measurements
5. Computer Fundamentals
6. Basic Electronics Engineering

Paper-II

1. Analog and Digital Electronics
2. Systems and Signal Processing
3. Control Systems
4. Electrical Machines
5. Power Systems
6. Power Electronics and Drives

UPSC ESE Syllabus 2021: Electronics And Telecommunication Engineering (For both objective and conventional type papers)

Paper I

1. Basic Electronics Engineering
2. Basic Electrical Engineering
3. Materials Science
4. Electronic Measurements and Instrumentation
5. Network Theory
6. Analog and Digital Circuits

Paper-II

1. Analog and Digital Communication Systems
2. Control Systems
3. Computer Organization and Architecture
4. Electro Magnetics
5. Advanced Electronics Topics
6. Advanced Communication Topics