Oil India Executive Syllabus 2026 PDF: Post-wise CBT Syllabus & Exam Pattern for Grade A, B & C Posts
Oil India Limited (OIL) has released the Oil India Syllabus 2026 for the Computer Based Test (CBT) under Advertisement No. HRAQ/REC-EX-B/2026-03, dated 15 October 2026. The syllabus covers all six Executive cadre posts in Grade A, B and C: Superintending Research Scientist (CH-01), Senior Officer Mechanical (ME-02), Senior Officer Petroleum (PE-03), Senior Accounts Officer / Senior Internal Auditor (AC-04), Hindi Officer (HO-05) and Confidential Secretary (CS-06). The CBT is tentatively scheduled for 28 December 2026, so candidates have about ten weeks to prepare.
The Oil India CBT has 100 marks for all post codes: Section I (40 marks) covers General English, Reasoning and Numerical Aptitude, and Section II (60 marks) tests subject knowledge of the post. Since Section II carries the most marks, candidates should focus on the post-wise topics given below. For vacancy, eligibility, salary and the apply link, read our full article on the Oil India Grade A, B & C Recruitment 2026, where the online application is open till 14 November 2026. This article covers the Oil India exam pattern 2026 and the complete post-wise syllabus, taken from the official syllabus PDF.
Quick summary:
➤ Syllabus: Oil India Executive CBT Syllabus 2026
➤ Advertisement No.: HRAQ/REC-EX-B/2026-03
➤ Posts covered: CH-01, ME-02, PE-03, AC-04, HO-05, CS-06
➤ CBT total marks: 100
➤ Section I (40 marks): General English, Reasoning, Numerical Aptitude
➤ Section II (60 marks): Post-wise subject knowledge
➤ CBT duration: 1 hour 30 minutes
➤ CBT date: 28 December 2026 (tentative)
➤ Official website: oil-india.com
Table of Contents
- Oil India CBT Exam Pattern 2026
- Superintending Research Scientist (CH-01) Syllabus
- Senior Officer Mechanical (ME-02) Syllabus
- Senior Officer Petroleum (PE-03) Syllabus
- Senior Accounts Officer (AC-04) Syllabus
- Hindi Officer (HO-05) Syllabus
- Confidential Secretary (CS-06) Syllabus
- Preparation Tips
- FAQs
- Important Links
Oil India CBT Exam Pattern 2026
The Oil India exam pattern 2026 is the same for all post codes. The CBT carries 100 marks and lasts 1 hour 30 minutes. The section-wise Oil India CBT pattern is given below.
| Section | Subjects | Marks |
|---|---|---|
| Section I | General English, Reasoning, Numerical Aptitude | 40 |
| Section II | Subject knowledge of the concerned post (post-wise syllabus) | 60 |
| Total | 100 | |
Selection after CBT, as per the advertisement:
| Posts | Stages | Final Merit | CBT Qualifying Marks |
|---|---|---|---|
| CH-01, ME-02, PE-03, AC-04 (Grade C & B) | CBT + Personal Interview (15 marks) | CBT × 0.85 + Interview marks | 50 (UR/OBC/EWS), 40 (SC/ST/PwBD) |
| HO-05, CS-06 (Grade A) | CBT + Proficiency/Skill Test (qualifying, 50/100) | CBT marks only | 50 (UR/OBC), 40 (PwBD) |
Oil India Superintending Research Scientist Syllabus (CH-01)
The Oil India Superintending Research Scientist syllabus is research-oriented and covers energy technologies, data analytics, laboratory operations and modelling. The topic-wise syllabus for Grade C post code CH-01 is given below.
| S.No. | Topic | Syllabus |
|---|---|---|
| 1 | Research Methodology, Scientific Investigation & Innovation | Scientific method, research design, hypothesis testing, design of experiments (DoE), statistical analysis, uncertainty quantification and error analysis, validation and verification, sensitivity analysis, technical report writing, publications, IPR/patents and technology transfer, innovation management, translational research, bench and pilot scale technology development, multivariate statistical analysis, probabilistic modelling, reproducibility and research ethics |
| 2 | Applied Science, Engineering & Energy Technologies | Upstream oil & gas operations, drilling and cementing, production and artificial lift systems, reservoir engineering, flow assurance, advanced chemicals and materials, critical minerals processing, geoscience, energy transition technologies, CCUS, hydrogen, energy storage, field validation and scale-up, EOR/IOR, multiphase flow, process intensification, process optimisation and green chemistry |
| 3 | Data Analytics, Digitalization & Emerging Technologies | Data analysis, statistical tools, modelling and simulation, predictive analytics, AI and ML, digital transformation, industrial system optimisation, uncertainty-aware modelling, AI/ML in reservoir modelling, materials design and process optimisation, time-series analytics, hybrid modelling |
| 4 | Laboratory, Pilot Plant & Field Operations | Laboratory management, pilot-scale studies, field trials, testing methods, instrumentation and calibration, quality assurance, SOPs, validation protocols, scale-up principles, process safety, material synthesis and characterisation |
| 5 | HSE, Quality Systems & Regulatory Compliance | Occupational health and safety, hazard identification, risk assessment, process safety, environmental management, statutory compliance, GLP, incident investigation, HAZOP, HAZAN, ESG frameworks, lifecycle assessment |
| 6 | Project Management, Technical Leadership & Resource Management | Planning, scheduling and control of engineering projects, resource optimisation, stakeholder management, leadership, budgeting, contract and vendor interface, risk management, R&D lifecycle management, commercialisation strategy, innovation portfolio management |
| 7 | Engineering Mathematics & Numerical Methods | Linear algebra, ODEs and PDEs, numerical methods, interpolation, regression, numerical integration, optimisation, stochastic methods, probabilistic modelling, applications in reservoir simulation, transport phenomena and reaction engineering |
| 8 | Modelling, Simulation & Computational Engineering | Mathematical modelling, process simulation, CFD fundamentals, reservoir simulation, multiphysics modelling, digital twin development, model validation, multiscale modelling, high-performance computing, AI-integrated simulation |
Oil India Senior Officer Mechanical Syllabus (ME-02)
The Oil India Senior Officer Mechanical syllabus is similar to core B.Tech Mechanical subjects. With 14 vacancies, this is the most competitive post. The topic-wise ME-02 syllabus is given below.
| S.No. | Topic | Syllabus |
|---|---|---|
| 1 | Theory of Machines | Simple mechanisms, friction drives, velocity and acceleration analysis, dynamic analysis of linkages, cams, gears and gear trains, flywheels and governors, balancing, gyroscope, kinematic synthesis, lifting machines, virtual work, impulse and momentum |
| 2 | Machine Design | Types of loads, failure theories, factor of safety, stress concentration, BIS codes, fits and tolerances, shaft design, keys, cotter and knuckle joints, couplings, belt and chain drives, fatigue and S-N diagram, bolted/riveted/welded joints, springs, spur and helical gears, clutches, brakes, tribology, journal and rolling contact bearings |
| 3 | Vibrations | Measurement of vibrations, seismic transducers, LVDT and piezo-electric accelerometers, free and forced vibration of SDOF systems, damping, vibration isolation, resonance, critical speed of shafts, 2DOF and MDOF systems |
| 4 | Engineering Mechanics | Equilibrium of rigid bodies, analysis of structures, friction, centre of gravity and moment of inertia, stress and strain, Mohr's circle, strain rosette, thin and thick cylinders, SFD and BMD, deflection of beams, torsion, Euler's theory of columns, hardness and impact testing |
| 5 | Engineering Materials | Structure and properties of materials, crystal directions and planes, binary phase diagrams, eutectic and peritectic reactions, heat treatment, stress-strain diagrams |
| 6 | Machining and Machine Tool Operations | Pattern making and sand casting, moulding sand, cores, powder metallurgy, welding, brazing, soldering, mechanics of metal cutting, chip formation, tool materials and tool life, economics of machining, non-conventional machining, jigs and fixtures |
| 7 | Metrology and Inspection | Engineering metrology, statistical process control, limits and fits, measuring instruments, screw thread and gear measurement, surface texture, interferometry, alignment testing |
| 8 | Production Planning and Control | Forecasting, aggregate planning, scheduling, MRP, inventory control (EOQ, ABC, VED, FSN), linear programming, transportation and assignment problems, PERT and CPM, maintenance management and TPM |
| 9 | Fluid Mechanics | Bernoulli's theorem, viscosity, laminar and turbulent flow, Reynolds number, Poiseuille's equation, fluid statics and kinematics, flow through pipes, compressible and viscous flow |
| 10 | Thermodynamics & Power Engineering | Laws of thermodynamics, properties of steam, air standard cycles, refrigeration cycle, fuels and combustion, boilers, steam power cycles, nozzles, turbines, condensers, regeneration and reheat, compressors, gas turbines, blowers, psychrometry |
| 11 | Turbo Machinery | Euler equation, Rankine and Brayton cycles, Pelton wheel, Francis turbine, centrifugal and reciprocating pumps, fluid couplings, hydraulic dynamometer, gear pumps |
| 12 | Heat Transfer | Modes of heat transfer, 1-D conduction, fins, unsteady conduction, lumped parameter system, Heisler's charts, convection correlations, heat exchangers (LMTD and NTU), radiation, Stefan-Boltzmann and Wien's laws, view factors |
| 13 | IC Engines | SI and CI engines, engine systems, performance and testing, fuels, emissions and emission control |
| 14 | CAD/CAM | Basic concepts of CAD/CAM, integration tools, additive manufacturing |
| 15 | Basics of Energy and Environment | Conservation, environmental pollution, climate change, environmental impact assessment, basics of renewable energy |
Oil India Senior Officer Petroleum Syllabus (PE-03)
The Oil India Senior Officer Petroleum syllabus covers petroleum geology, drilling, reservoir and production engineering, with special focus on oil fields of Northeast India. The topic-wise PE-03 syllabus is given below.
| S.No. | Topic | Syllabus |
|---|---|---|
| 1 | Petroleum Geology | Geology of petroleum, stratigraphy and micro-palaeontology, structure, tectonics and basin evolution, source and reservoir rock, oil and gas fields in India with special reference to Northeast India |
| 2 | Geophysical Exploration & Prospecting | Gravity, magnetic and electrical methods, well logging techniques and interpretation, VSP, advances in logging tools |
| 3 | Drilling Technology | Drilling process, formation pressure, geomechanics, drilling fluids and well control, drill string, casing and cementing, well planning, drilling optimisation, directional drilling, complications, air and gas drilling, rheology and filtration of drilling fluids, cement slurry |
| 4 | Reservoir Engineering and Rock & Fluid Properties | Reservoir fluids and phase behaviour, porosity, permeability, saturation, wettability, fluid flow, drive mechanisms, reserve estimation, core analysis, crude oil and formation water analysis |
| 5 | Natural Gas Engineering | Wellbore and choke performance, gas flow measurement, unconventional gas reservoirs, natural gas as alternative fuel |
| 6 | Flow through Porous Media | Single and multi-phase flow, effective properties, injection well location, sweep efficiency, displacement mechanisms, modelling and simulation |
| 7 | Production Technology | Oil recovery methods, well completion design, well activation, flowing well performance, well stimulation, artificial lift |
| 8 | Exploration and Development of Oil & Gas Fields | Exploration methods, well prognosis and economic analysis, field development, G&G data integration, sequence stratigraphy, unconventional hydrocarbons, future exploration in Assam-Arakan Basin / NE India |
| 9 | Geophysical Exploration and Data Processing | Electromagnetic methods, elasticity and seismic waves, seismic methods and data acquisition |
| 10 | Applied Reservoir Engineering | Flow equations, oil and gas well testing, water influx, immiscible displacement, integrated reservoir management, reservoir simulation |
| 11 | Surface Production Operations | Surface gathering system, gas and liquid processing, handling of gas, oil and water, flow assurance, sand control |
| 12 | Enhanced Oil Recovery | Water injection, immiscible and miscible displacement, thermal and chemical recovery methods, designing flow parameters |
| 13 | HSE and Risk Management | Health hazards in the petroleum industry, safety, environment, principles and application of risk management in the upstream oil industry |
| 14 | Well Servicing | Sick wells, workover operations and equipment, workover fluids, well intervention |
| 15 | Oil Well Production Technology | Petroleum geology basics, well completion, well performance, artificial lift, surface production operations |
| 16 | Petroleum Geoscience | Petroleum system, origin, migration and accumulation, Rock-Eval pyrolysis, source rock maturation, reservoir traps, oilfield life cycle, drive mechanisms, EOR, sandstone diagenesis, clay minerals, wireline logs, unconventional resources, NELP/HELP and regulatory bodies |
Oil India Senior Accounts Officer / Senior Internal Auditor Syllabus (AC-04)
The Oil India Senior Accounts Officer syllabus is close to the CA/CMA final level and covers accounting, costing, law, taxation and audit. The topic-wise AC-04 syllabus is given below.
| S.No. | Topic | Syllabus |
|---|---|---|
| 1 | Financial Accounting & Reporting | Accounting Standards, Ind AS vs IFRS carve-outs/ins, company financial statements (P&L, Balance Sheet, Cash Flow), profit/loss prior to incorporation, SEBI regulations on financial matters, Internal Financial Controls |
| 2 | Cost and Management Accounting | Materials, labour, overheads, non-integrated accounts, job, batch, contract, process and operating costing, standard and marginal costing, CVP analysis, pricing decisions, budgets and budgetary control, variance analysis, transfer pricing, ESOP and buy-back, capital budgeting |
| 3 | Company Law and Allied Laws | Companies Act 2013, Insolvency and Bankruptcy Code 2016, Indian Contract Act 1872, Negotiable Instruments Act 1881, Payment of Bonus Act 1965, FEMA 1999 |
| 4 | Direct Tax Laws | Income Tax Act 1961 and Rules |
| 5 | Indirect Tax Laws | CGST Act 2017, IGST Act 2017, Customs Act 1962, Customs Tariff Act 1975, Foreign Trade Policy (as relevant) |
| 6 | Auditing and Assurance | Auditing and Assurance Standards, audit preparation, internal control, vouching, verification of assets and liabilities, company audit, audit report, special audit, cost audit and record rules, risk analysis and mitigation |
Oil India Hindi Officer Syllabus (HO-05)
The Oil India Hindi Officer (Official Language) syllabus covers official language policy, Hindi literature, grammar and translation. The topic-wise HO-05 syllabus is given below.
| S.No. | Topic |
|---|---|
| 1 | Official Language policy of the Union, constitutional provisions, President's Order 1960, Official Language Resolution 1968 (OL Act, Rules and OL Programme) |
| 2 | Government institutions and projects related to official language Hindi |
| 3 | National Language and Official Language |
| 4 | Development of Hindi language and literature |
| 5 | History of Hindi literature |
| 6 | Hindi literary studies: poetry, novel, story, play |
| 7 | Hindi grammar, vocabulary, usage and sentence correction |
| 8 | Prominent Hindi writers and their works |
| 9 | Modern trends in Hindi literature / criticism |
| 10 | History and development of the Devanagari script |
| 11 | Hindi–English and English–Hindi translation, technical terminology |
| 12 | Scientific and technical translation and terminology |
| 13 | IT tools related to Hindi |
| 14 | Hindi in e-governance |
| 15 | General knowledge related to Hindi |
| 16 | English grammar, vocabulary, usage and sentence correction |
| 17 | English and Hindi passage-based questions |
Oil India Confidential Secretary Syllabus (CS-06)
The Oil India Confidential Secretary syllabus focuses on typing, English shorthand, office management, secretarial practice and basic computers. The topic-wise CS-06 syllabus is given below.
| S.No. | Topic | Syllabus |
|---|---|---|
| 1 | Typing | Methods of typing, centering, typing of letters (blocked, semi-blocked, NOMA simplified), envelopes and postcards, annexures and appendices, tabular typing, correction of errors, typing on printed forms and from recorded tapes, personal and work habits |
| 2 | Shorthand (English) | Consonants, vowels (long, short, dot, dash), intervening vowels, grammalogues, punctuation, diphthongs, phraseography, circles and loops, initial and final hooks, shun hooks, halving and doubling principles, prefixes and suffixes, contractions, figures, proper names, advanced phraseography, business, banking, insurance, technical and legal phrases |
| 3 | Office Management | Filing, office functions and layout, office manager duties, reception, communication, correspondence and registers, office machines and equipment (computers, photocopier, intercom, EPBX, fax), LAN/MAN/WAN, internet and e-mail, personnel management, supervision and work control |
| 4 | Secretarial Practice | Role of a secretary, company management and administration, directors, company formation, memorandum and articles, prospectus, meetings, shares and debentures, official and demi-official correspondence, agenda and minutes, circulars, communication and listening skills, interview etiquette, general knowledge (energy conservation, environment, Factories Act, ESI, EPF, Workmen's Compensation, accident prevention) |
| 5 | Basic Computer Knowledge | Computer fundamentals, operating systems, hardware (motherboard, processor, input/output and storage devices), software types, MS-Excel basics, internet |
Oil India Exam Preparation Tips 2026
- Section II carries 60 of the 100 marks, so give most of your time to the post-wise subject syllabus.
- For Section I, practise General English, Reasoning and Numerical Aptitude from bank and SSC-level books.
- Senior Officer (Mechanical) candidates can use GATE Mechanical study material, as most topics overlap.
- Senior Officer (Petroleum) candidates should give extra attention to Northeast India and Assam-Arakan Basin oil fields.
- Hindi Officer and Confidential Secretary candidates should practise translation, typing and shorthand regularly, as the skill test is qualifying.
- CBT qualifying marks are 50 out of 100 for UR/OBC/EWS and 40 for SC/ST/PwBD.
Oil India Syllabus 2026 FAQs
Q1. What is the Oil India CBT exam pattern 2026?
The CBT has 100 marks: Section I (40 marks) on General English, Reasoning and Numerical Aptitude, and Section II (60 marks) on post-wise subject knowledge. Duration is 1 hour 30 minutes.
Q2. When is the Oil India CBT exam 2026?
The CBT is tentatively scheduled for 28 December 2026.
Q3. Is the syllabus the same for all Oil India posts?
Section I is common for all posts. Section II has a separate syllabus for each post code.
Q4. What are the qualifying marks in the Oil India CBT?
50 out of 100 for UR/OBC(NCL)/EWS and 40 out of 100 for SC/ST/PwBD.
Q5. Where can I download the Oil India syllabus PDF?
The official syllabus PDF is available on oil-india.com. The direct link is given in the Important Links section below.
Oil India Syllabus 2026 Important Links
Important Links
| Description | Link |
|---|---|
| Oil India Syllabus 2026 PDF | Download Syllabus PDF |
| Oil India Detailed Advertisement PDF | Download Notification |
| Oil India Apply Online (till 14.11.2026, 11:00 AM) | Apply Online |
| Join our WhatsApp Channel for updates | Join BongJobs WhatsApp Channel |
| Join our Telegram Channel for updates | Join BongJobs Telegram Channel |
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