IOCL Executive Syllabus 2026 - obtain Subject Wise Syllabus PDF

IOCL Syllabus 2026 - Overview

Interested applicants should know that, The table below summarises the posts as well as grades for which IOCL has declared a syllabus, based on the authorized documents.

IOCL Executive Syllabus 2026 - Direct Link

Indian Oil Corporation Limited has published the authorized indicative syllabus for IOCL Executive Recruitment 2026. Applicants may verify the General Aptitude syllabus applicable to all posts as well as the separate Domain Knowledge syllabus for Grade A, Grade A0 along with Grade E0 posts from the links below.

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IOCL General Aptitude Syllabus 2026 (All Posts)

The General Aptitude syllabus is common across all posts as well as grades Diploma (E0), Quality Control (A0), in addition to all Grade A disciplines. It covers three areas: Verbal Ability of English Language, Quantitative Aptitude, in addition to Logical Reasoning.

1. Verbal Ability of English Language Syllabus

Basic English grammar: tenses, prepositions, articles, adjectives, conjunctions, verb-noun agreement, along with other parts of speech

Aspirants are advised that, Basic vocabulary: words, idioms, along with phrases in context

According to the latest notice, Reading as well as comprehension

As per the official update, Narrative sequencing

2. Quantitative Aptitude Syllabus

According to the latest notice, Data interpretation: data graphs (bar graphs, pie charts, in addition to other graphs representing data)

2- in addition to 3-dimensional plots, maps, as well as tables

Numerical computation along with estimation: ratios, percentages, powers, exponents in addition to logarithms, permutations as well as combinations, along with series

Mensuration as well as geometry, elementary statistics as well as probability

3. Logical Reasoning Syllabus

According to the latest notice, Logic: deduction in addition to induction, analogy, numerical relations in addition to reasoning

The conducting body has announced that, Transformation of shapes: translation, rotation, scaling, mirroring, assembling, along with grouping; paper folding, cutting, as well as patterns in 2 along with 3 dimensions

furthermore Read: RSSB Lab Assistant Result 2026

IOCL Domain Knowledge Syllabus 2026 - Grade E0 (Diploma Posts)

Grade E0 covers three Diploma-level posts: Electrical, Mechanical, as well as Safety. Each has its own domain knowledge syllabus, listed below.

1. IOCL Diploma Electrical Syllabus (Grade E0)

Introduction to Electric Generation Systems

According to the latest notice, Electrical Circuit Theory

Electrical Machines

Electronic Devices in addition to Circuits

Power Electronics

The department has confirmed that, Electrical as well as Electronic Measurements

Digital Electronics

Transducers along with Signal Conditioners

Electric Power Transmission as well as Distribution

Microcontroller, Programmable Logic Controller in addition to Microprocessor

It is informed that, Electrical Estimation, Energy Auditing in addition to Energy Conservation

According to the latest notice, Electrical Properties of Materials

Electrical Machine Controller

Candidates should note that, Control Systems - Analysis along with Modelling

The department has confirmed that, Signals as well as Systems

Illumination Practices

Building Electrification

It is informed that, Renewable Energy Power Plant

2. IOCL Diploma Mechanical Syllabus (Grade E0)

Basic Mechanical Engineering

Computer Aided Machine Drawing

Material Science as well as Engineering

Fluid Mechanics along with Hydraulic Machinery

Manufacturing Engineering

Thermal Engineering

The department has confirmed that, Measurements & Metrology

Interested applicants should know that, Strength of Materials

Advanced Manufacturing Processes

As per the official update, Theory of Machines & Mechanisms

Industrial Engineering & Management

Design of Machine Elements

Production in addition to Operations Management

The department has confirmed that, Pneumatic Tools as well as System

3. IOCL Diploma Safety Syllabus (Grade E0)

(A) Introduction to Industrial Safety

Fundamentals of Industrial Safety, importance of workplace safety, safety laws in addition to regulations

Occupational Health as well as Safety Standards, Safety Management Systems (SMS)

Hazard Identification as well as Risk Assessment (HIRA), Personal Protective Equipment (PPE)

Aspirants are advised that, Emergency Response Planning, Accident Investigation in addition to Reporting

Behavior-Based Safety (BBS): human factors in safety, motivation, safety culture development, along with psychological aspects of accidents

(B) Industrial Hazards along with Risk Management

Types of industrial hazards (physical, chemical, biological, ergonomic)

Fire in addition to explosion hazards, electrical hazards along with safety measures

Interested applicants should know that, Chemical exposure along with toxicity management

Noise along with vibration hazards, confined space safety, working at heights safety

Machine guarding in addition to Lockout/Tagout (LOTO), radiation hazards in addition to control measures

The official notification states that, (C) Fire Prevention along with Safety Management

As per the official update, Causes in addition to classification of fires, fire prevention strategies

Fire detection in addition to alarm systems, fire extinguishers (types as well as usage)

Fixed fire suppression systems (sprinklers, CO2, foam)

Emergency evacuation procedures, fire safety drills in addition to training

Flammable as well as combustible material handling

Interested applicants should know that, (D) Electrical Safety as well as Hazard Control

Basics of electrical safety, electrical accidents in addition to their causes

Electrical protective devices (circuit breakers, fuses, RCDs)

According to the latest notice, Earthing in addition to grounding systems, electrical maintenance best practices

Lockout/Tagout (LOTO) procedures, safe use of electrical tools as well as equipment

Candidates should note that, (E) Mechanical Safety in addition to Machine Maintenance

Introduction to mechanical hazards, safe use of industrial machinery

Importance of preventive maintenance, lubrication in addition to wear prevention

Bearing along with gear maintenance, vibration analysis for fault detection

Failure Modes as well as Effects Analysis (FMEA), safety in heavy machinery operations

Candidates should note that, (F) Chemical Safety along with Hazardous Material Handling

As per the official update, Classification of hazardous substances, Safety Data Sheets (SDS) along with labelling

Safe storage as well as transportation of chemicals, chemical spill management in addition to response

Toxicology along with exposure limits, personal protective measures for chemical handling

Hazardous waste management as well as disposal, industrial ventilation as well as fume control

The conducting body has announced that, Safety mandates for bulk storage tanks, pipelines, gas cylinders, in addition to hazardous chemical transportation

(G) Construction Safety

Safety in excavation, scaffolding, demolition, piling, along with working at heights

(H) Maintenance Safety

Confined space entry protocols, work permits, in addition to safety during shutdowns

The department has confirmed that, (I) Industrial Legislation & Labour Laws

The Factories Act, 1948: roles as well as responsibility of Safety Officer; detailed study of Chapters IV (Safety), IV-A (Hazardous Processes), along with V (Welfare)

The official notification states that, The Environment Protection Act, 1986: rules on hazardous waste management, air, in addition to water pollution control boards

The Petroleum Act, The Explosives Act, in addition to The Building along with Other Construction Workers (BOCW) Act

IOCL Domain Knowledge Syllabus 2026 - Grade A0 (Quality Control)

1. Technical Competency Related to Testing and Analytical Equipment

Working principles, recent trends, operations as well as chemistry of analytical equipment:

HPLC, GC, UV-VIS Spectrophotometer, X-Ray Fluorescence (XRF)

Micro-coulometer, CHNS, ICP (ICP-OES along with ICP-MS)

Atomic Absorption Spectrometry (AAS)

Ultraviolet Fluorescence Technology for Sulfur Determination

Chromatography techniques, Fourier Transform Infrared Spectroscopy (FTIR)

As per the official update, Karl Fischer Titration, Differential Scanning Calorimetry (DSC)

Basic principles of chemistry techniques:

Interested applicants should know that, Types of titration, indicators, principle of reaction of titration along with applications

It is informed that, Lambert Beer Law in addition to applications, analytical techniques (principle as well as operation)

Metal analysis by wet chemistry, units of measurement, ppm to % conversion

Repeatability, reproducibility in addition to precision

Candidates should note that, Analytical standards in addition to CRMs, uncertainty of measurement

Basic physical properties of petroleum in addition to petrochemical products:

Flash Point, Pour Point, Aniline Point

Aspirants are advised that, Kinematic Viscosity as well as Viscosity Index, Smoke Point, Octane Number, Cetane Number

Density, Distillation, Boiling Point Distribution, Aromatics Determination

Melt Flow Index, UTM (polymer testing), polymer additives as well as chemistry, crude along with physical data

Aspirants are advised that, Specification of petroleum products in addition to global standards:

LPG, Gasoline, HSD, Aviation Fuels, Bitumen, Lubes, PE along with PP polymers

ASTM, ISO, IS standards; ISO/IEC 17025 Testing in addition to Calibration Laboratories

Water Chemistry:

It is informed that, Physical along with chemical properties of water, importance of water properties

Effluent along with drinking water analysis, boiler water chemistry

2. Domain Knowledge: Basic Chemistry

SI units along with conversions, solution chemistry (Normality, Molarity, Molality, ppm, ppb, %)

Basic chemistry of titration, critical name reactions, elementary thermodynamics

Catalyst chemistry in addition to significance, liquid as well as gaseous states

Nomenclature of organic compounds

The official notification states that, Basic polymer chemistry in addition to Ziegler-Natta catalyst

Laboratory safety rules, identification of glassware, primary in addition to secondary measurement tools as well as glassware

Calibration of spectrophotometer, calibration of balance, solvent polarity

The department has confirmed that, Boiling along with melting points, matter as well as its states, atoms along with molecules

Chemical bonds: ionic, covalent, metallic

Chemical reactions: endothermic, exothermic, combustion, synthesis, decomposition, replacement

3. Basic Organic Chemistry

Hydrocarbons: alkanes, alkenes, alkynes

As per the official update, Functional group chemistry: alcohols, ketones, acids

4. Laboratory Safety

As per the official update, Chemical storage in addition to labelling

Personal protective equipment

Safe handling of glassware

It is informed that, Safe/unsafe conditions, acts in addition to near miss

The department has confirmed that, as well Read: RSSB Forester Result 2026

IOCL Domain Knowledge Syllabus 2026 - Grade A (Engineering, Law & Management Posts)

Grade A covers nine disciplines: Chemical, Electrical, Instrumentation, Mechanical, Electronics along with Communication Engineering, Civil Engineering, Computer Science along with Information Technology, Law, along with MBA (Marketing Management).

1. IOCL Chemical Engineering Syllabus (Grade A)

Engineering Mathematics

Candidates should note that, Process Calculation & Thermodynamics

According to the latest notice, Fluid Mechanics & Mechanical Operations

Chemical Reaction Engineering

Interested applicants should know that, Instrumentation & Process Control

Plant Design in addition to Economics

Candidates should note that, Heat Transfer

Mass Transfer

Chemical Technology

2. IOCL Electrical Engineering Syllabus (Grade A)

Engineering Mathematics

Electrical Machines

Power Systems

Control Systems

Electric Circuits

It is informed that, Electromagnetic Fields

Signals in addition to Systems

Electrical as well as Electronic Measurements

Analog in addition to Digital Electronics

It is informed that, Power Electronics

3. IOCL Instrumentation Syllabus (Grade A)

Engineering Mathematics

The conducting body has announced that, Control Systems

Analog Electronics

The department has confirmed that, Digital Electronics

Electricity as well as Magnetism

Electrical Circuits as well as Machines

The department has confirmed that, Signals as well as Systems

Interested applicants should know that, Measurements

Sensors in addition to Industrial Instrumentation

Communication in addition to Optical Instrumentation

4. IOCL Mechanical Engineering Syllabus (Grade A)

Engineering Mathematics

The official notification states that, Engineering Mechanics

Mechanics of Materials

Theory of Machines, Vibrations & Machine Design

Fluid Mechanics

Interested applicants should know that, Heat Transfer, Thermodynamics & Power Engineering

Fluid Mechanics in addition to Thermal Sciences

Materials, Manufacturing in addition to Industrial Engineering

5. IOCL Electronics and Communication Engineering Syllabus (Grade A)

Engineering Mathematics

Networks, Signals along with Systems

Electronic Devices

Aspirants are advised that, Analog Circuits

Digital Circuits

Control Systems

Communications

Electromagnetics

6. IOCL Civil Engineering Syllabus (Grade A)

Engineering Mathematics

Structural Engineering

Geotechnical Engineering

Water Resources Engineering

It is informed that, Environmental Engineering

Transportation Engineering

Geomatics Engineering

7. IOCL Computer Science and Information Technology Syllabus (Grade A)

Engineering Mathematics

Digital Logic

Computer Organization in addition to Architecture

Programming as well as Data Structures

The conducting body has announced that, Algorithms

Theory of Computation

The official notification states that, Compiler Design

Operating System

Databases

Computer Networks

8. IOCL Law Syllabus (Grade A)

Substantive laws (including rules framed thereunder, if any):

Candidates should note that, Procedural laws - major statutes:

Minor procedural laws:

In line with the departmental syllabus, the Law test will not be based only on theoretical knowledge yet as well on practical domain knowledge from the syllabus above.

9. IOCL MBA (Marketing Management) Syllabus (Grade A)

Introduction to Marketing - Concepts in addition to Approaches: market, marketing, customer needs/wants/demands, marketing orientations, holistic marketing, marketing mix, recent trends in marketing

Developing Marketing Strategy: business portfolio strategies, marketing strategy, Porter generic strategies, value chain analysis, SWOT analysis, marketing plan, marketing control, Go-to-Market (GTM) strategies, customer acquisition in addition to retention strategies, rural marketing strategies, B2B along with B2C marketing approaches

Marketing Information in addition to Forecasting: analyzing marketing environment, marketing information system, demand forecasting, estimating current in addition to future demand

Marketing Research: process of marketing research, research instruments, sampling plan, measuring marketing productivity

Consumer Behaviour along with Industrial Markets: factors influencing consumer behaviour, consumers' buying decision process along with behaviour, buyer decision process in new products, theories of consumer behaviour, business buyer behaviour in addition to model, industrial in addition to institutional buying behaviour, key account management, buying behaviour in energy as well as fuel markets

Segmentation, Targeting along with Positioning: market segmentation, market targeting, differentiation in addition to positioning

The department has confirmed that, Product Decisions: product levels, product classification along with decisions, new product development, product adoption process, product life cycle

Pricing Decisions: pricing strategies, new product pricing strategies, product mix pricing strategies, price-adjustment strategies, price changes, public policy along with pricing, pricing during PLC

Services Marketing: types of service marketing, managing service marketing, gap analysis, SERVQUAL model, customer experience management, service recovery strategies

Distribution Decisions: channel management as well as conflict, channel integration along with systems, logistics management (including international), supply chain management, retail management along with decisions, recent trends in retail in India, wholesaling in addition to wholesale marketing decisions

Promotion Decisions: integrated marketing communications (IMC), marketing communication process, promotion budget along with mix strategies, advertising management, sales promotion, publicity, personal selling, direct marketing, trade promotion in addition to dealer engagement programs, loyalty programs along with customer engagement, sales force management, integrated digital campaigns

Brand Management: brand equity models in addition to elements, designing brand strategy, brand portfolios, managing brand equity, corporate branding, brand extension strategies, premium as well as branded product positioning, customer perception along with brand experience

Marketing Ethics: product, price, place in addition to promotion related ethics, consumer protection

Candidates should note that, Managing Marketing Organization along with Control: organizing marketing department, marketing implementation along with control

Interested applicants should know that, Digital Marketing: digital marketing, social media marketing, SEM along with SEO, mobile marketing, marketing analytics in addition to performance metrics, digital customer journey mapping

Social in addition to Not-for-Profit Marketing: socially responsible behaviour, cause-related marketing, sustainable marketing, marketing along with environmental concerns, social marketing, not-for-profit marketing

Customer Value in addition to Customer Relationship Management: customer value, lifetime value, profitability, loyalty, satisfaction, CRM, database marketing, customer acquisition cost (CAC), retention metrics, loyalty management programs, data analytics for customer insights

As per the official update, International Marketing: international marketing decisions, types of global firms

The official notification states that, Competition Analysis: analyzing competition, competitive marketing strategies in addition to positions, balancing customer as well as competitor orientations, competitive intelligence, market share analysis, benchmarking of retail networks, differentiation strategies in commodity markets

The conducting body has announced that, Retail in addition to Channel Management: retail business models, retail site selection along with network planning, forecourt retailing concepts, category management, convenience retailing, visual merchandising, retail performance metrics

Sales along with Territory Management: sales forecasting, sales force effectiveness, territory planning, KPIs, relationship management with dealers/distributors

Non-Fuel Retail (NFR) Marketing: NFR business models, convenience store marketing, partnerships along with alliances, customer footfall monetization, cross-selling in addition to up-selling strategies

Logos in addition to Taglines

Strategic Management - Concept as well as Types: levels, forms along with process of strategy

External Analysis: PESTEL framework, ETOP, QUEST, Porter's 5 Forces, impact matrix, strategic group mapping

Internal Analysis: competitive advantage, critical success factors, value chain analysis, benchmarking, SWOT analysis, SFAS matrix, strategic advantage profile (SAP)

Business Strategies: generic competitive strategies, first mover advantages, cooperative strategies, industry life cycle

Corporate Strategies: growth, stability, retrenchment in addition to combination strategy, turnaround management

As per the official update, Business Portfolio Analysis: BCG matrix, IE matrix, GE McKinsey matrix, experience curve, grand strategy matrix, SPACE matrix

Strategy Implementation as well as Evaluation: strategy implementation along with structure, strategy evaluation in addition to control, control mechanisms, strategic incentive management, McKinsey's 7S model

Management of Strategic Change: barriers to change, models of strategic change, change requirements

How to Prepare for the IOCL Exam 2026

Start with the General Aptitude syllabus (Verbal Ability, Quantitative Aptitude, Logical Reasoning) since it is common to every post in addition to can be prepared alongside your domain subjects.

Map the domain knowledge syllabus for your specific post against your diploma/degree coursework, in addition to prioritise topics you are least familiar with first.

For technical posts (Grade E0 as well as Grade A engineering disciplines), revise core subjects like Circuit Theory, Machines, Thermodynamics, along with Control Systems using standard diploma/GATE-level reference books, since the topic names closely mirror standard engineering curricula.

For the Law post, focus on the Constitution (Articles 32 in addition to 226), Contract Act, as well as the newer codes (Bharatiya Nagarik Suraksha Sanhita along with Bharatiya Sakshya Adhiniyam, both 2023) since these replace earlier procedural laws along with are likely to be tested on recent amendments.

For MBA (Marketing Management), pay attention to IOCL-specific applications called out in the syllabus, such as "Buying Behaviour in Energy in addition to Fuel Markets," "Forecourt Retailing Concepts," in addition to "Non-Fuel Retail (NFR) Marketing," since these are unique to the oil-marketing business rather than generic MBA topics.

Since the authorized examination format has not been issued with this syllabus, keep checking the authorized announcement for updates on question count, marks, as well as duration before finalising a revision timetable.

IOCL Syllabus 2026 - Important Links

Click to verify General Aptitude Syllabus (All Posts) PDF

Click to review Domain Knowledge Syllabus - Grade A Posts PDF

Click to confirm Domain Knowledge Syllabus - Grade A0 Post PDF

Interested applicants should know that, Click to verify Domain Knowledge Syllabus - Grade E0 Posts PDF

IOCL Department notice / Latest Job Openings: https://iocl.com/