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IOCL Recruitment 2026 (470 Executive Posts)
Check official notification, Grade A/A0/E0 vacancies, salary structure & online apply link.
Official Syllabus Hub 2026
Advt. No. IOCL/CO-HR/RECTT/2026/01
Indian Oil Corporation Limited (IOCL) has published separate official Syllabus PDFs for the 2026 Executive Recruitment (470 Posts). Candidates should note that the General Aptitude syllabus is common to all posts, while the Domain Knowledge syllabus varies according to the post grade (Grade A, Grade A0, Grade E0). This page serves as the central IOCL Syllabus Hub to find the exact subject-wise syllabus and official PDF download links.
🧭 IOCL Syllabus Hub 2026 – Post Navigation
| Recruitment Post & Grade | Domain Syllabus Category |
|---|---|
| Graduate Engineer – Grade A | Engineering/Technical Domain Syllabus (Civil, Mech, Elect, Chem, ECE, Instrumentation, CS/IT) |
| Marketing Officer – Grade A | MBA Marketing Management (31 Comprehensive Modules) |
| Law Officer – Grade A | Law (Substantive & Procedural Laws, BCI Standards) |
| Assistant Quality Control Officer – Grade A0 | Chemistry & Quality Control Testing |
| Diploma Engineer – Grade E0 Electrical | Electrical Engineering Diploma Syllabus |
| Diploma Engineer – Grade E0 Mechanical | Mechanical Engineering Diploma Syllabus |
| Diploma Engineer – Grade E0 Safety | Industrial Safety & Environmental Legislation |
| General Aptitude (All Posts) | Common for All 470 Executive Posts (50 Questions / 60 Mins) |
| IOCL Grade A Chemical Engineering Full Mock Test 1 (100 MCQs / 150 Marks) | Practice Chemical Mock |
| IOCL Grade A Chemical Engineering Full Mock Test 2 (Numerical Focus | 100 MCQs / 150 Marks) | Practice Numerical Mock |
| IOCL Grade A Chemical Engineering Full Mock Test 3 (Advanced Conceptual + Numerical | 100 MCQs / 150 Marks) | Practice Advanced Mock |
📝 IOCL Exam Pattern 2026
The CBT written examination consists of 100 objective multiple-choice questions for a total duration of 150 minutes:
| Section | No. of Questions | Time Allotted | Negative Marking |
|---|---|---|---|
| Section A: General Aptitude | 50 MCQs | 60 Minutes | -0.25 Mark per wrong answer |
| Section B: Domain Knowledge | 50 MCQs | 90 Minutes | -0.25 Mark per wrong answer |
| TOTAL | 100 MCQs | 150 Minutes | 0.25 Negative Marking |
🧠 Part 1: IOCL General Aptitude Syllabus 2026 (Common for All Posts)
A. Verbal Ability – English Language
- Basic English Grammar: Tenses, Prepositions, Articles, Adjectives, Conjunctions, Subject-Verb Agreement, and other Parts of Speech.
- Vocabulary: Word meanings, Synonyms/Antonyms, Idioms & Phrases in context.
- Reading & Narrative: Reading Comprehension passages and Narrative Sequencing.
B. Quantitative Aptitude
- Data Interpretation: Bar graphs, Pie charts, Line graphs, 2D/3D Data plots, Tables, and Maps.
- Numerical Computation: Ratios, Percentages, Powers, Exponents, Logarithms, Permutations & Combinations, Series.
- Geometry & Statistics: Mensuration, Geometry, Elementary Statistics, and Probability.
C. Logical Reasoning
- Logic: Deduction, Induction, Analogy, and Numerical relations reasoning.
- Transformation of Shapes: Translation, Rotation, Scaling, Mirroring, Assembling, Grouping.
- Pattern-Based Reasoning: Paper folding, Paper cutting, 2D patterns, 3D patterns.
⚙️ Part 2: Grade A Domain Knowledge Syllabus
Engineering Mathematics, Process Calculations & Thermodynamics, Fluid Mechanics & Mechanical Operations, Chemical Reaction Engineering, Instrumentation & Process Control, Plant Design and Economics, Heat Transfer, Mass Transfer, Chemical Technology.
Engineering Mathematics, Electrical Machines, Power Systems, Control Systems, Electric Circuits, Electromagnetic Fields, Signals and Systems, Electrical and Electronic Measurements, Analog and Digital Electronics, Power Electronics.
Engineering Mathematics, Engineering Mechanics, Mechanics of Materials, Theory of Machines, Vibrations & Machine Design, Fluid Mechanics, Heat Transfer, Thermodynamics & Power Engineering, Fluid Mechanics and Thermal Sciences, Materials, Manufacturing and Industrial Engineering.
Substantive Laws: Indian Contract Act 1872, Specific Relief Act 1963, Sale of Goods Act 1930, Transfer of Property Act 1882, Companies Act 2013, IBC 2016, Constitution of India (Art 32/226), DPDP Act 2023, Competition Act 2002, Consumer Protection Act 2019, RTI Act 2005, Essential Commodities Act, Legal Metrology Act, Public Premises Act, SEBI guidelines.
Procedural Laws: Arbitration & Conciliation Act 1996, Mediation Act 2023, Code of Civil Procedure (CPC 1908), Bharatiya Nagarik Suraksha Sanhita 2023, Bharatiya Sakshya Adhiniyam 2023, Limitation Act, Commercial Courts Act 2015.
Note: Questions will test practical application alongside theoretical concepts.
Procedural Laws: Arbitration & Conciliation Act 1996, Mediation Act 2023, Code of Civil Procedure (CPC 1908), Bharatiya Nagarik Suraksha Sanhita 2023, Bharatiya Sakshya Adhiniyam 2023, Limitation Act, Commercial Courts Act 2015.
Note: Questions will test practical application alongside theoretical concepts.
Marketing Concepts, Marketing Strategy, SWOT & Value Chain Analysis, Marketing Information System & Demand Forecasting, Marketing Research, Consumer Behaviour & B2B/B2C Markets, Segmentation Targeting & Positioning (STP), Product Life Cycle & New Product Development, Pricing Strategies, Services Marketing & SERVQUAL, Distribution Channels & Logistics, Integrated Marketing Communications (IMC), Brand Management & Equity Models, Digital Marketing (SEO, SEM, Social Media), CRM & Customer Lifetime Value, International Marketing, Competitive Analysis, Retail & Forecourt Retailing, Non-Fuel Retail (NFR) Models, Logos and Taglines, Strategic Management Frameworks (PESTEL, Porter 5 Forces, BCG Matrix, GE-McKinsey Matrix, McKinsey 7S Model).
🧪 Part 3: Grade A0 Quality Control (Chemistry) Syllabus
- Analytical Instruments: HPLC, GC, UV-VIS Spectrophotometer, XRF, Micro-coulometer, CHNS, ICP-OES, ICP-MS, AAS, UV fluorescence, FTIR, Karl Fischer Titration, DSC.
- Basic Chemistry Techniques: Titrations, Lambert-Beer Law, Metal analysis, ppm conversions, Precision, Repeatability, Reproducibility, CRMs, Measurement uncertainty.
- Petroleum Product Properties: Flash Point, Pour Point, Aniline Point, Kinematic Viscosity, Smoke Point, Octane/Cetane Number, Density, Distillation, Polymer testing (UTM/MFI), ASTM/ISO/IS standards, ISO/IEC 17025 compliance.
- Water & Lab Safety: Effluent analysis, Boiler-water chemistry, Chemical storage, PPE, LOTO, Near-miss concepts.
⚡ Part 4: Grade E0 Diploma Syllabus (Electrical, Mechanical & Safety)
E0 Electrical
Power Generation, Circuit Theory, Machines, Measurements, Microcontrollers, PLC, Electrical Estimation, Energy Auditing, Building Electrification, Renewable Energy.
E0 Mechanical
Machine Drawing, Fluid Mechanics, Manufacturing, Thermal Engineering, Metrology, Strength of Materials, Pneumatics, Industrial Engineering, Production Management.
E0 Safety
Industrial Safety, HIRA, PPE, Behavior-Based Safety, Fire & Electrical Safety, Chemical Safety, Construction Safety, Factories Act 1948, Environment Protection Act.
🔗 Official Download Links – IOCL Syllabus PDFs
| General Aptitude Official Syllabus PDF (All Posts) | Download PDF |
| Grade A Domain Knowledge Syllabus PDF | Download PDF |
| Grade A0 Quality Control Syllabus PDF | Download PDF |
| Grade E0 Diploma (Elect/Mech/Safety) Syllabus PDF | Download PDF |
| Official Detailed Recruitment Notification PDF | Detailed Notification |
❓ IOCL Syllabus 2026 FAQs
Yes. IOCL's official General Aptitude PDF is common to all posts and covers English, Quantitative Aptitude, and Logical Reasoning.
No. Each grade and post has its own distinct domain syllabus document (Grade A, Grade A0, Grade E0).
Yes. The official Marketing syllabus explicitly includes Digital Marketing, SEO, SEM, Mobile Marketing, Marketing Analytics, and Digital Customer Journey Mapping.