Bharat Electronics Limited (BEL) conducts recruitment for Probationary Engineer positions with 350 vacancies through a two-stage selection process comprising a Computer-Based Test and Interview. Understanding the complete syllabus and exam pattern is essential for candidates preparing for the 2026 recruitment.
Overview
The BEL Probationary Engineer recruitment (Advertisement No. 17556/HR/All-India/2026) offers 350 positions across engineering disciplines. The selection process consists of an online Computer-Based Test followed by a personal interview. The CBT is the primary qualifying stage where candidates must demonstrate their technical and reasoning abilities.
Exam Pattern and Structure
| Part | Section | Number of Questions | Marks | Duration |
|---|---|---|---|---|
| Part I | General Aptitude & Reasoning | 25 | 25 | 2 Hours (Combined) |
| Part II | Concerned Discipline Subjects | 100 | 100 | |
| Total | — | 125 | 125 | — |
The exam consists of 125 multiple-choice questions carrying a total of 125 marks. Each question carries 1 mark, and candidates must complete the entire test in 2 hours. A penalty of 0.25 marks is deducted for each incorrect answer.
Syllabus for Electronics Discipline
Electronics candidates must prepare topics across 13 major subject areas. Key subjects include:
High Priority Subjects: Network Theory (network theorems, circuit analysis, transient response, resonance, two-port networks), Analog Electronics (amplifiers, operational amplifiers, oscillators, feedback circuits), and Digital Electronics (Boolean algebra, logic gates, combinational circuits, sequential circuits, counters, registers).
Communication and Control: Signals and Systems (Fourier series, Fourier transform, Laplace transform, Z-transform) and Communication Systems (amplitude modulation, frequency modulation, digital modulation, noise).
Additional Topics: Control Systems (transfer functions, block diagrams, stability, root locus), Electronic Devices (semiconductor physics, diodes, BJTs, FETs, MOSFETs), Engineering Mathematics (matrices, differential equations, calculus, probability, complex numbers), Electromagnetic Theory (electrostatics, magnetostatics, electromagnetic waves, transmission lines), Microprocessors and Microcontrollers (architecture, instruction sets, memory organisation), Measurements and Instrumentation (measurement errors, bridges, sensors, transducers), Digital Signal Processing (sampling, discrete-time systems, digital filters, DFT and FFT), and Antennas and Wave Propagation (antenna parameters, radiation patterns, waveguides).
Syllabus for Mechanical Discipline
Mechanical candidates must prepare the following 15 major subjects:
High Priority Subjects: Strength of Materials (stress and strain, bending moment, shear force, torsion, deflection, columns), Thermodynamics (first and second laws, entropy, thermodynamic cycles), Fluid Mechanics (fluid statics, Bernoulli's equation, pipe flow, boundary layers), Heat Transfer (conduction, convection, radiation, heat exchangers), and Manufacturing Engineering (casting, welding, machining, metal forming).
Core Engineering Subjects: Engineering Mathematics (calculus, differential equations, matrices, probability, numerical methods), Engineering Mechanics (force systems, equilibrium, friction, work, energy, momentum), Theory of Machines (kinematics, mechanisms, gears, governors, flywheels, balancing), Machine Design (design principles, failure theories, shafts, bearings, springs, gears), and Materials Science (material properties, phase diagrams, heat treatment, alloys).
Additional Topics: Production Engineering (production planning, process selection, manufacturing systems, quality control), Industrial Engineering (work study, inventory management, operations research), Refrigeration and Air Conditioning (refrigeration cycles, psychrometry, cooling loads), IC Engines and Power Plants (engine performance, combustion, boilers, turbines), and Engineering Drawing (orthographic projection, sectional views, dimensioning).
Subject-Wise Preparation Strategy
Electronics Preparation Focus: Prioritise Network Theory, Analog Electronics, and Digital Electronics with focus on core concepts, formulas, and circuit-based questions. Give equal attention to Signals and Systems and Communication Systems, emphasising transformations, modulation, and numerical problems. Control Systems requires deep study of stability, transfer functions, and response analysis. Cover Electronic Devices and Electromagnetic Theory for fundamental concepts and applications. Medium priority subjects include Microprocessors and Measurements focusing on architecture and instrumentation. Reserve revision time for Engineering Mathematics, Digital Signal Processing, and Antennas with formula revision and selected problems.
Mechanical Preparation Focus: Give highest priority to Strength of Materials and Thermodynamics using core formulas and numerical problems. Fluid Mechanics, Heat Transfer, and Manufacturing Engineering require thorough practice with equations and applications. Theory of Machines and Machine Design need focus on mechanisms, components, and design principles. Medium priority subjects—Engineering Mechanics and Materials Science—require study of fundamental laws and properties. Allocate revision time for Industrial Engineering, Refrigeration and Air Conditioning, and Power Plants using key concepts and short notes.
Important Links
Frequently Asked Questions
Q: What is the total duration of the BEL Probationary Engineer CBT?
A: The Computer-Based Test has a total duration of 2 hours for all 125 questions combined.
Q: How many questions are in the BEL Probationary Engineer exam?
A: There are 125 multiple-choice questions: 25 on General Aptitude & Reasoning and 100 on the concerned discipline subjects.
Q: Is there negative marking in the BEL Probationary Engineer exam?
A: Yes, there is negative marking of 0.25 marks for each wrong answer.
Q: What are the main subjects covered in the exam for Electronics Engineers?
A: Electronics candidates must study Network Theory, Analog Electronics, Digital Electronics, Signals and Systems, Communication Systems, Control Systems, Electromagnetic Theory, Microprocessors, and related topics.
Q: What is the selection process for BEL Probationary Engineer?
A: The selection involves two stages: Computer-Based Test (CBT) followed by Interview.
Q: How many vacancies are available for Probationary Engineer in BEL?
A: A total of 350 vacancies are available for the Probationary Engineer position (Advertisement No. 17556/HR/All-India/2026).
Candidates must verify all details on the official BEL website before starting preparation.