TNUSRB SI Technical Syllabus 2026 – Detailed Guide

Are you preparing for TNUSRB Sub Inspector (Technical) 2026 Exam?

Understanding the official syllabus is the first and most important step in your preparation. Many aspirants start preparation without clarity on topics, which leads to confusion later.

Here is the complete syllabus structure (based on previous recruitment pattern followed in earlier notifications like 2018), which will guide your 2026 preparation effectively.

The syllabus is generally divided into:

• General Knowledge

• Core Technical Subjects

• Programming & Computer Applications

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TNUSRB SI Technical Exam Pattern Overview

The Technical SI exam mainly tests engineering fundamentals along with General Knowledge. The technical portion carries major weightage, so candidates from ECE / EEE background must focus deeply on core concepts.

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TNUSRB SI Technical Syllabus 2026 – Unit Wise

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UNIT I – Electronic Devices and Circuits

Important topics:

• Semiconductor Basics (Intrinsic & Extrinsic)

• PN Junction Diode & Zener Diode

• Rectifiers

• BJT, FET, MOSFET

• SCR, DIAC, TRIAC

• Amplifiers & Oscillators

• Power Electronics

• Converters & Inverters

• PLC & DCS Basics

👉 Focus on circuit analysis and numerical problems.

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UNIT II – Electrical Circuits and Machines

Key Topics:

• DC & AC Circuits

• Ohm’s Law & Kirchhoff’s Law

• Network Theorems

• Transformers

• DC Machines

• Induction Motors

• Measuring Instruments

• CRO & Digital Oscilloscope

• Sensors & Transducers

👉 Numerical practice is very important in this section.

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UNIT III – Microelectronics and Microprocessor

Topics Covered:

• Number Systems

• Boolean Algebra

• Logic Gates

• Combinational & Sequential Circuits

• Operational Amplifier

• ADC & DAC

• IC 555 Timer

Microprocessor & Microcontroller

• 8085 Architecture

• 8051 Architecture

• Instruction Set

• Interrupts

• Serial Communication

• Programming Basics

👉 This is a scoring section. Revise architecture and instruction-based questions.

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UNIT IV – Network, Antenna and Propagation

Topics:

• Network Theorems

• Filters & Equalizers

• Antenna Fundamentals

• Dipole & Yagi Antenna

• Radiation Parameters

• Radio Wave Propagation

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UNIT V – Communication Engineering

Important Areas:

• Amplitude Modulation

• Frequency Modulation

• Pulse Modulation

• Digital Communication

• Information Theory

• Optical Communication

• Wireless Communication (2G, 3G, 4G Basics)

• Radar Systems

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UNIT VI – Programming and Computer Applications

• Computer Fundamentals

• OSI Model

• TCP/IP

• Cyber Security

• Cryptography

• Encryption & Decryption

• Authentication

Programming in C

• Basic Syntax

• Operators

• Decision Making

• Simple Programs

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General Knowledge Syllabus

• General Science

• Indian History

• Indian Polity

• Geography

• Economics

• Current Affairs (National & Tamil Nadu)

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TNUSRB SI Technical Preparation Tips 2026

✔ Study technical subjects daily
✔ Practice previous year questions
✔ Revise formulas weekly
✔ Take full-length mock tests
✔ Follow daily current affairs

Consistency is the key to clearing TNUSRB SI Technical exam.

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TNUSRB SI Technical Syllabus PDF Download

Candidates are advised to download the official syllabus and print it for structured preparation. Mark completed topics and revise systematically.

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Final Words

Understanding the TNUSRB SI Technical Syllabus 2026 is the first step toward success. If you plan properly and revise consistently, clearing the exam is absolutely achievable.

Start today. Stay disciplined. Achieve your goal.