IOCL JE Syllabus 2026: Check Subject-Wise Topics for Electrical, Mechanical and Safety

The IOCL JE Syllabus 2026 includes common subjects and post-specific technical subjects. Verbal Ability of English Language, Quantitative Aptitude, and Logical Reasoning are common to all posts. The technical syllabus is given separately for Diploma Electrical, Diploma Mechanical, and Diploma Safety under Grade E0.

You can use the subject-wise syllabus to understand the topics you need to cover. The syllabus includes grammar, vocabulary, comprehension, numerical topics, reasoning, electrical engineering, mechanical engineering, industrial safety, and relevant laws.

IOCL JE Syllabus for Verbal Ability of English Language

The Verbal Ability of English Language section is common to all posts. It covers basic English grammar, vocabulary, reading and comprehension, and narrative sequencing.

You need to cover the grammar topics listed in the syllabus. These include tenses, prepositions, articles, adjectives, conjunctions, and verb-noun agreement. You also need to study vocabulary, idioms, and phrases in context.

Reading and comprehension and narrative sequencing are also included in this section.

IOCL JE Syllabus for Quantitative Aptitude

The Quantitative Aptitude section is common to all posts. It includes data interpretation, numerical computation and estimation, mensuration, geometry, elementary statistics, and probability.

You need to cover data graphs, including bar graphs and pie charts. The syllabus also includes 2- and 3-dimensional plots, maps, and tables.

For numerical computation and estimation, you need to study ratios, percentages, powers, exponents and logarithms, permutations and combinations, and series. Mensuration, geometry, elementary statistics, and probability are also included.

IOCL JE Syllabus for Logical Reasoning

The Logical Reasoning section is common to all posts. It includes logic, analogy, numerical relations and reasoning, transformation of shapes, paper folding and cutting, and patterns in two and three dimensions.

You need to cover deduction and induction under logic. Analogy and numerical relations and reasoning are also part of the syllabus.

The transformation of shapes section includes translation, rotation, scaling, mirroring, assembling, and grouping. Paper folding and cutting are included as well. You also need to study patterns in two and three dimensions.

IOCL JE Syllabus for Diploma Electrical

The Diploma Electrical syllabus is applicable to Grade E0. It covers electrical generation, circuits, machines, electronics, measurements, power transmission and distribution, control systems, and related subjects.

The technical topics are:

1. Introduction to Electric Generation Systems

2. Electrical Circuit Theory

3. Electrical Machines

4. Electronic Devices and Circuits

5. Power Electronics

6. Electrical and Electronic Measurements

7. Digital Electronics

8. Transducers and Signal Conditioners

9. Electric Power Transmission and Distribution

10. Microcontroller, Programmable Logic Controller and Microprocessor

11. Electrical Estimation, Energy Auditing and Energy Conservation

12. Electrical Properties of Materials

13. Electrical Machine Controller

14. Control Systems – Analysis and Modelling

15. Signals and Systems

16. Illumination Practices

17. Building Electrification

18. Renewable Energy Power Plant

You need to cover all the topics listed for Diploma Electrical. The syllabus includes electrical circuits and machines along with electronics, measurements, power transmission and distribution, control systems, and related areas.

IOCL JE Syllabus for Diploma Mechanical

The Diploma Mechanical syllabus is applicable to Grade E0. It covers basic mechanical engineering, machine drawing, material science, fluid mechanics, manufacturing, thermal engineering, measurements, machine design, and industrial engineering.

The technical topics are:

1. Basic Mechanical Engineering

2. Computer-Aided Machine Drawing

3. Material Science and Engineering

4. Fluid Mechanics and Hydraulic Machinery

5. Manufacturing Engineering

6. Thermal Engineering

7. Measurements and Metrology

8. Strength of Materials

9. Advanced Manufacturing Processes

10. Theory of Machines and Mechanisms

11. Industrial Engineering and Management

12. Design of Machine Elements

13. Production and Operations Management

14. Pneumatic Tools and System

You need to study all the topics listed for Diploma Mechanical. The syllabus covers areas from basic mechanical engineering and materials to manufacturing, thermal engineering, machine design, production, and industrial management.

IOCL JE Syllabus for Diploma Safety

The Diploma Safety syllabus applies to Grade E0. It covers industrial safety, industrial hazards, fire safety, electrical safety, mechanical safety, chemical safety, construction safety, maintenance safety, and industrial legislation and labour laws.

Introduction to Industrial Safety

This section covers the fundamentals of industrial safety and the importance of workplace safety. It includes safety laws and regulations, occupational health and safety standards, Safety Management Systems (SMS), Hazard Identification and Risk Assessment (HIRA), and Personal Protective Equipment (PPE).

You also need to study emergency response planning, accident investigation and reporting, and Behavior-Based Safety (BBS). BBS includes human factors in safety, motivation, safety culture development, and psychological aspects of accidents.

Industrial Hazards and Risk Management

This section covers physical, chemical, biological, and ergonomic hazards. It also includes fire and explosion hazards, electrical hazards and safety measures, chemical exposure and toxicity management, and noise and vibration hazards.

Confined space safety, working at heights safety, machine guarding, Lockout/Tagout (LOTO), radiation hazards, and control measures are also included.

Fire Prevention and Safety Management

This section covers the causes and classification of fires. It includes fire prevention strategies, fire detection and alarm systems, and fire extinguishers.

You need to study the types and usage of fire extinguishers. Fixed fire suppression systems include sprinklers, CO2, and foam. The syllabus also covers emergency evacuation procedures, fire safety drills and training, and handling of flammable and combustible materials.

Electrical Safety and Hazard Control

This section covers the basics of electrical safety and electrical accidents and their causes. It includes electrical protective devices such as circuit breakers, fuses, and RCDs.

You also need to study earthing and grounding systems, electrical maintenance practices, Lockout/Tagout (LOTO) procedures, and the safe use of electrical tools and equipment.

Mechanical Safety and Machine Maintenance

This section covers mechanical hazards and the safe use of industrial machinery. It includes preventive maintenance, lubrication, and wear prevention.

Bearing and gear maintenance, vibration analysis for fault detection, Failure Modes and Effects Analysis (FMEA), and safety in heavy machinery operations are also included.

Chemical Safety and Hazardous Material Handling

This section covers the classification of hazardous substances. It also includes Safety Data Sheets (SDS) and labelling, safe storage and transportation of chemicals, and chemical spill management and response.

You need to study toxicology and exposure limits, personal protective measures for chemical handling, hazardous waste management and disposal, and industrial ventilation and fume control.

The syllabus also includes safety mandates for bulk storage tanks, pipelines, gas cylinders, and hazardous chemical transportation.

Construction Safety

The Construction Safety section covers safety in excavation, scaffolding, demolition, piling, and working at heights.

Maintenance Safety

The Maintenance Safety section covers confined space entry protocols, work permits, and safety during shutdowns.

Industrial Legislation and Labour Laws

This section includes the Factories Act, 1948. It covers the roles and responsibilities of a Safety Officer and the detailed study of Chapters IV (Safety), IV-A (Hazardous Processes), and V (Welfare).

The syllabus also includes the Environment Protection Act, 1986. You need to study rules on hazardous waste management and air and water pollution control boards.

The Petroleum Act, the Explosives Act, and the Building and Other Construction Workers (BOCW) Act are also included.

The IOCL JE Syllabus gives the topics that you need to cover for the respective post. You should use the subject-wise list to organise your preparation and ensure that the listed areas are covered.

Also, Check:

• IOCL Recruitment 2026

• AE/JE Online Batches by PW

• AE/JE Test Series by PW

Enroll in PW AE JE Online Courses to prepare effectively for the SSC JE, RRB JE, and other upcoming AE/JE examinations. Avail the structured study material with mock tests, e-books, etc. to gear up your exam preparation.