Oil India Limited CBT 2025 Syllabus: Complete Study Guide

Oil India Limited (OIL) has released a comprehensive syllabus for the Computer Based Test (CBT) 2025 recruitment process under Advertisement No. RF/HRA/04/ER/REC/2025 dated 10.09.2025. This detailed guide covers all sections and post-specific technical knowledge required for successful preparation for workpersons recruitment in OIL-Rajasthan Field.

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CBT Structure and Syllabus Overview

The Computer Based Test consists of three sections with specific mark distribution:

Section A: English Language & General Knowledge (20% Marks)

Common for All Posts

General English

• Grammar & Structure: Vocabulary, sentence structure, synonyms, antonyms
• Language Skills: Sentence correction, direct & indirect speech
• Voice: Active & passive voice transformations
• Usage: Correct application of grammatical rules

General Knowledge & Awareness

• Geography: India and neighboring countries
• Current Affairs: Sports, history, culture, economic developments
• Polity: General polity including Indian Constitution
• Science: Scientific research and developments
• Regional Knowledge: Specific questions on Rajasthan
• Company Knowledge: Questions on Oil India Limited

Section B: Reasoning & Arithmetic (20% Marks)

Common for All Posts

Reasoning Ability

• Logical Reasoning: Analogies, similarities and differences
• Spatial Ability: Space visualization, problem solving
• Cognitive Skills: Analysis, judgment, decision making
• Memory & Observation: Visual memory, discriminating observation
• Classification: Verbal and figure classification, non-verbal series
• Relationships: Relationship concepts

Arithmetic/Numerical Ability

• Basic Arithmetic: Arithmetical reasoning, number series, computation
• Percentage & Fractions: Percentage problems, fraction calculations
• Time-Speed-Distance: Time & work, distance & speed problems
• Advanced Topics: Permutations & combinations, data interpretation
• Geometry: Ratio & proportion, areas & volumes, mensuration

Section C: Domain/Technical Knowledge (60% Marks)

Post Code: RFJAC12025 (Junior Assistant Computer)

English Knowledge

• Grammar: Active/passive voice, prepositions, error spotting
• Vocabulary: Homophones, synonyms, antonyms, idioms & phrases
• Sentence Skills: Transformation, joining sentences, completion
• Advanced Topics: Para completion, sentence arrangement, error correction
• Language Components: Articles, tenses, gerunds, prefix & suffix

Computer Knowledge

• Fundamentals: Basic computer knowledge, computer characteristics
• Hardware: Computer organization (RAM, ROM), file systems, input devices
• Software: Operating systems, MS-Office suite (Word, Excel, PowerPoint)
• Modern Technology: Information technology in society, digital signatures
• E-Governance: IT applications in government, mobile technology
• Security: Cyber security, information kiosks

Post Code: RFFTR12025 (Fitter)

Safety & Workshop Practices

• Industrial Safety: PPEs, first aid, emergency response
• Hot Work: Confined space work, material handling equipment
• Workshop Tools: Bench vice, files, marking and measuring tools

Mechanical Engineering

• Materials: Physical & mechanical properties of metals
• Metal Types: Pig iron, cast iron, steel, non-ferrous metals
• Cutting Tools: Power saw, band saw, circular saw machines
• Precision Tools: Micrometer, vernier calipers, dial indicators

Manufacturing Processes

• Drilling: Types, materials, angles, holding devices, troubleshooting
• Sheet Metal: Specifications, shearing machines, stakes, joints
• Fastening: Soldering, flux types, counter boring, reaming
• Threading: Tap and dies, screw threads, grinding wheels

Machine Tools

• Lathe Operations: Specifications, parts, cutting tools, chucks
• Finishing Processes: Lapping, honing, turning operations
• Maintenance: TPM, autonomous maintenance, schedules

Power Transmission

• Mechanical Systems: Belts, couplings, pulleys, power transmission
• Hydraulic Systems: Pascal’s law, valves, cylinders, motors
• Lubrication: Types, purposes, applications

Post Code: RFMDL12025 (Mechanic Diesel)

Safety & Tools

• Workshop Safety: PPEs, first aid, fire extinguishers
• Hand Tools: Marking tools, measuring instruments, cleaning tools
• Precision Measurement: Micrometers, vernier calipers, gauges

Mechanical Processes

• Joining Methods: Permanent/temporary joints, bolting, riveting, soldering
• Machining: Drilling machines, drill bits, taps, dies, reamers
• Sheet Metal Work: Shearing, bending, drawing, fastening methods

Electrical Basics

• Fundamentals: Ohm’s law, voltage, current, resistance, power
• Components: Batteries, cells, magnetic effects, circuit breakers
• Instruments: Voltmeter, ammeter, ohmmeter, fuses

Engine Technology

• Engine Types: Internal/external combustion engines, 2-stroke/4-stroke
• Engine Components: Cylinder head, pistons, crankshaft, camshaft
• Support Systems: Cooling systems, lubrication, fuel feed systems
• Gas Turbines: Single/two-stage turbines, comparison with diesel engines

Maintenance & Troubleshooting

• Emission Control: Vehicle emissions, Euro/Bharat standards
• Problem Diagnosis: Starting issues, fuel consumption, overheating
• Filters: Oil, fuel, air filters and replacement schedules
• Battery Maintenance: DG battery care, voltage stabilizers

Post Code: RFAEL12025 (Assistant Electrician)

Electrical Safety

• Hazard Management: Power failure, system failure, fire response
• Safety Equipment: Fire extinguishers, PPEs, first aid

Electrical Fundamentals

• Basic Laws: Ohm’s law, Kirchhoff’s laws, resistance laws
• Components: Conductors, insulators, cables, capacitors
• Systems: DC/AC comparison, electromagnetic principles
• Regulations: CEA rules, wiring types, earthing methods

Electrical Machines

• DC Machines: Generators, motors, characteristics, speed control
• AC Motors: Three-phase induction motors, single-phase motors
• Transformers: Working principles, construction, cooling types
• Synchronous Machines: Alternators, synchronous motors

Power Systems

• Generation: Conventional and non-conventional energy sources
• Distribution: Transmission networks, substations
• Protection: Relays, circuit breakers, earthing systems
• Measurement: Electrical parameters, analog/digital instruments

Modern Applications

• Power Electronics: Diodes, power devices, drives
• Control Systems: Voltage stabilizers, UPS, inverters
• Illumination: Laws of illumination, lamp types, lighting systems

Post Code: RFSAA12025 (Senior Assistant Accounts)

Accountancy

• Core Concepts: Conceptual framework, income measurement
• Financial Statements: Final accounts, depreciation accounting
• Banking: Bills of exchange, letters of credit, bank reconciliation
• Cash Flow: Cash flow statements, financial analysis

Business Studies

• Organization: Business objectives, environment, entrepreneurship
• Operations: Finance, production, marketing, HR development
• Management: Planning, organizing, leading, controlling

Economics

• Microeconomics: Price mechanism, consumer behavior, demand elasticity
• Production: Production function, cost theory, market structures
• Statistics: Central tendency, index numbers, time-series analysis

Legal Framework

• Business Law: Indian Contract Act 1872, Sale of Goods Act 1930
• Company Law: Types of companies, incorporation, share capital
• Taxation: Income tax basics, TDS-TCS, GST provisions

Specialized Areas

• Cost Accounting: Marginal costing, budgetary control, standard costing
• Auditing: Types of audits, audit process, objectives

Post Code: RFSAH12025 (Senior Assistant Hindi)

सामान्य हिन्दी (General Hindi)

• भाषा परिचय: हिन्दी का सामान्य परिचय, प्रमुख बोलियां
• व्याकरण: वर्णमाला, विराम चिह्न, शब्द रचना (उपसर्ग, प्रत्यय)
• संज्ञा और सर्वनाम: लिंग, वचन, कारक, विशेषण, क्रिया, काल
• वाक्य रचना: वाक्य, उपवाक्य, पदबंध, संधि, संधि-विच्छेद
• शब्द भंडार: मुहावरे, लोकोक्तियां, पर्यायवाची, विलोम शब्द
• अनुवाद: हिन्दी वाक्यांशों का अंग्रेजी में अनुवाद
• साहित्य: हिन्दी साहित्य एवं पुरस्कार

General English

• Grammar: Tenses, articles, prepositions, conjunctions
• Comprehension: Unseen passages, sentence completion
• Vocabulary: Synonyms, antonyms, idioms & phrases
• Language Skills: Error correction, translation into Hindi

Computer Aptitude

• Basics: Computer abbreviations, hardware, software
• Systems: Operating systems, networking, internet
• Applications: MS Office suite (Word, Excel, PowerPoint)
• Shortcuts: Keyboard shortcuts, memory management

Post Code: RFCIV12025 (Civil Engineering Assistant)

Safety & Computer Skills

• Safety Protocols: PPEs, first aid, emergency response
• Computer Applications: MS-Office applications (Word, Excel, PowerPoint)

Building Technology

• Materials: Stone, bricks, sand, mortar, timber
• Construction: Foundation, masonry, doors, windows
• Finishing: Painting, varnishing, plastering, pointing

Water Resources

• Hydrology: Water requirements, hydrological cycles
• Structures: Dams, canals, cross-drainage works
• Management: Watershed management, waterlogging

Surveying & Drawing

• Basic Surveying: Chain survey, compass survey, leveling
• Advanced Surveying: Theodolite, contouring, tacheometry
• Engineering Drawing: Building plans, perspective views, AutoCAD

Structural Engineering

• Mechanics: Stresses, strains, shear force, bending moments
• Design: RCC structures, limit state method, IS codes
• Analysis: Truss analysis, beam deflection, column design

Transportation & Geotechnical

• Highway Engineering: Geometric design, pavement construction
• Soil Engineering: Properties, bearing capacity, foundation design
• Quality Control: Material testing, IS codes compliance

Environmental Engineering

• Water Supply: Treatment systems, distribution networks
• Waste Management: Sewage treatment, solid waste management
• Pollution Control: Environmental protection measures

Post Code: RFELE12025 (Electrical Engineering Assistant)

Safety & Regulations

• Electrical Safety: PPEs, emergency response, fire safety
• Regulations: Oil Mines Regulation 2017, CEA Regulations 2023

Engineering Fundamentals

• Mechanical Elements: Properties of gases/steam, turbines, engines
• Electrical Principles: Magnetism, electromagnetic induction
• Electronic Devices: Semiconductors, transistors, amplifiers

Circuit Analysis

• Network Theorems: DC/AC network analysis, dependent sources
• AC Circuits: Single-phase, three-phase circuits, transients
• Measurements: Electrical parameters, instrumentation systems

Electrical Machines

• DC Machines: Generators, motors, special DC machines
• Transformers: Single-phase, three-phase, special transformers
• AC Machines: Induction motors, alternators, synchronous motors

Power Systems

• Generation: Thermal, solar, wind energy systems
• Transmission: Distribution networks, substation design
• Protection: Switchgear, relays, circuit breakers

Modern Technology

• Non-Conventional Energy: Solar, wind, geothermal systems
• Power Electronics: Drives, UPS systems, voltage stabilizers
• Control Systems: SCADA, automation, instrumentation

Preparation Strategy

Time Allocation

• Section C (Technical): 60% of study time – Focus heavily on domain knowledge
• Section A (GK/English): 25% of study time – Current affairs and language skills
• Section B (Reasoning): 15% of study time – Practice and speed building

Study Resources

• Technical Books: Standard textbooks for respective engineering disciplines
• Current Affairs: Monthly magazines, daily newspapers
• Practice Tests: Mock tests, previous year papers
• Online Resources: Educational websites, video lectures

Monthly Study Plan

1. Month 1: Complete technical syllabus coverage
2. Month 2: General knowledge, current affairs, and reasoning
3. Month 3: Intensive practice, mock tests, and revision

Final Preparation Tips

• Focus maximum effort on Section C as it carries 60% weightage
• Stay updated with Oil India Limited news and developments
• Practice time management through mock tests
• Maintain consistency in daily study hours
• Take regular breaks to avoid burnout

Important Notes

• The syllabus is comprehensive and covers both fundamental and advanced topics
• Questions will be in MCQ format with no negative marking
• Test will be bilingual (English and Hindi)
• Regular practice is essential for success in the technical section
• Stay updated with current affairs, especially related to the oil and gas industry

Exam Duration: 2 hours
Question Format: Multiple Choice Questions (MCQ)
Languages: English and Hindi
Negative Marking: None