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Indian Oil Corporation Limited

IOCL Executive Syllabus 2026 - obtain Subject Wise Syllabus PDF

SyllabusPublished 17 Aug 2026
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According to the latest notice, IOCL Executive Syllabus 2026 for Grade A, A0 & E0 posts. verify subject-wise syllabus, General Aptitude, Domain Knowledge, assessment pattern as well as obtain authorized syllabus PDF.

Details

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.
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
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/

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Last checked 31 Aug 2026.

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