GSECL Junior Engineer Exam Pattern & Syllabus 2025 – Stream-wise Breakdown



Looking to crack the GSECL Vidyut Sahayak (Junior Engineer) exam in 2025? You’ve come to the right place! This guide walks you through the detailed exam pattern and syllabus, so you can strategize your preparation with precision and confidence.


🧪 Exam Structure at a Glance

GSECL conducts recruitment through a two-tier online examination, followed by document verification and medical fitness assessment.

StageTypeMarksLanguage
Tier IGeneral Aptitude100English/Gujarati
Tier IITechnical Subject100English/Gujarati

⚠️ Note: ¼ mark will be deducted for each wrong answer in both tiers.


Thanks, Mehul! Here’s a clean and professionally structured format of the entire syllabus content for Vidyut Sahayak – Junior Engineer roles across different disciplines. I’ve optimized it for visual clarity so it’s ready for print, publication, or web layout:


⚡ VIDYUT SAHAYAK – JUNIOR ENGINEER (Electrical)

📝 First Tier Examination (100 Marks)

Tentative syllabus; emphasis may differ.

  • Section I: Reasoning – 25 Marks
  • Section II: Quantitative Aptitude – 25 Marks
  • Section III: English – 15 Marks
  • Section IV: Computer Knowledge – 20 Marks
  • Section V: Gujarati Language & Grammar – 15 Marks

🔌 Second Tier Examination (100 Marks) – Electrical Engineering

  • Engineering Mathematics
  • Electric Circuits
  • Electromagnetic Fields
  • Signals and Systems
  • Electrical Machines
  • Power Systems
  • Control Systems
  • Electrical & Electronics Measurements
  • Analog and Digital Electronics
  • Power Electronics

🔧 VIDYUT SAHAYAK – JUNIOR ENGINEER (Mechanical)

📝 First Tier Examination (100 Marks)

Tentative syllabus; emphasis may differ.

  • Section I: Reasoning – 25 Marks
  • Section II: Quantitative Aptitude – 25 Marks
  • Section III: English – 15 Marks
  • Section IV: Computer Knowledge – 20 Marks
  • Section V: Gujarati Language & Grammar – 15 Marks

⚙️ Second Tier Examination (100 Marks) – Mechanical Engineering

➤ Engineering Mathematics

➤ Applied Mechanics and Design

  • Engineering Mechanics
  • Mechanics of Materials
  • Theory of Machines
  • Vibrations
  • Machine Design

➤ Fluid Mechanics & Thermal Sciences

  • Fluid Mechanics
  • Heat Transfer
  • Thermodynamics
  • Applications

➤ Materials, Manufacturing & Industrial Engineering

  • Engineering Materials
  • Casting, Forming & Joining Processes
  • Machining & Machine Tool Operations
  • Metrology & Inspection
  • Computer Integrated Manufacturing
  • Production Planning & Control
  • Inventory Control
  • Operations Research

🎛️ VIDYUT SAHAYAK – JUNIOR ENGINEER (Instrumentation & Control)

📝 First Tier Examination (100 Marks)

Tentative syllabus; emphasis may differ.

  • Section I: Reasoning – 25 Marks
  • Section II: Quantitative Aptitude – 25 Marks
  • Section III: English – 15 Marks
  • Section IV: Computer Knowledge – 20 Marks
  • Section V: Gujarati Language & Grammar – 15 Marks

🎯 Second Tier Examination (100 Marks) – Instrumentation & Control Engineering

  • Engineering Mathematics
  • Instrumentation Engineering
  • Electrical Circuits
  • Signals and Systems
  • Control Systems
  • Analog Electronics
  • Digital Electronics
  • Measurements
  • Sensors and Industrial Instrumentation
  • Communication and Optical Instrumentation

📡 VIDYUT SAHAYAK – JUNIOR ENGINEER (Electronics & Communication)

📝 First Tier Examination (100 Marks)

Tentative syllabus; emphasis may differ.

  • Section I: Reasoning – 25 Marks
  • Section II: Quantitative Aptitude – 25 Marks
  • Section III: English – 15 Marks
  • Section IV: Computer Knowledge – 20 Marks
  • Section V: Gujarati Language & Grammar – 15 Marks

🧠 Second Tier Examination (100 Marks) – Electronics & Communication

➤ Networks

  • Network Graphs & Theorems
  • Steady-State Sinusoidal Analysis
  • Linear Differential Equations

➤ Electronic Devices

  • Energy Bands in Silicon
  • Diodes: Zener, Tunnel
  • Transistors: BJT, JFET, MOSFET
  • MOS Capacitor, LED, Avalanche Photo Diode
  • Device Technology

➤ Analog Circuits

  • Diode Equivalent Circuits
  • Amplifiers, Op-Amps, Filters

➤ Digital Circuits

  • Boolean Algebra
  • Combinatorial & Sequential Circuits
  • 8085 Microprocessor: Architecture, Programming, Memory, I/O

➤ Signals & Systems

  • Laplace Transform Properties
  • Sampling Theorem
  • LTI Systems & Signal Transmission

➤ Control Systems

  • Control System Components
  • Open/Closed Loop Systems
  • Stability Analysis & Compensators

➤ Communications

  • Analog Communication & Spectral Analysis
  • SNR in Amplitude Modulation
  • Information Theory & Channel Capacity
  • Basics: TDMA, FDMA, CDMA, GSM

➤ Electromagnetics

  • Vector Calculus
  • Wave Equation
  • Transmission Lines: Characteristic Impedance & Transformation

📌 Tips for Aspirants

  • 👁️ Practice mock tests in both English & Gujarati
  • 🖋️ Revise basic engineering subjects thoroughly
  • 📊 Prioritize high-weight sections like Reasoning & Technical Subjects
  • ⏱️ Work on time management with sectional mock drills
  • ✅ Regularly check www.gsecl.in for updates

Please read the Official Notification carefully before submitting your application.

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