Oil India Limited has released the comprehensive Computer Based Test (CBT) syllabus for its 2025 recruitment covering 103 posts across Grades A, B, and C. This detailed guide provides subject-wise syllabus breakdown for all technical and non-technical positions to help candidates prepare effectively for the upcoming examination.
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CBT Exam Pattern Overview
Section-wise Distribution
- Section I (40 marks): General English, Reasoning, Numerical Aptitude
- Section II (60 marks): Subject-specific technical knowledge
- Total Duration: 1 hour 30 minutes
- Total Marks: 100 marks
Qualifying Marks
- General/EWS/OBC-NCL: 50%
- SC/ST/PwBD: 40%
Grade C Syllabus
Superintending Engineer (Production) – SPE-01
Core Technical Areas
1. Petroleum Exploration
- Classification of reservoir rocks (clastic and non-clastic)
- Origin, migration, and accumulation of petroleum
- Formation pressure analysis and artesian effects
- Faulting, salt beds, and gas cap effects
2. Oil and Gas Well Drilling Technology
- Well planning and drilling methods
- Drilling rigs and operating systems
- Drilling fluid properties and maintenance
- Cementing operations and drill string design
- Directional drilling and horizontal wells
3. Well Control
- Hydrostatic and formation pressure calculations
- Primary and secondary well control systems
- Kick prevention and control procedures
- BOP testing and equipment requirements
- Well kill methods and safety protocols
4. Reservoir Engineering
- Petrophysical properties analysis
- Core analysis and reservoir fluid properties
- Phase behavior of hydrocarbon systems
- Water and gas coning phenomena
- Recovery factors and drive mechanisms
5. Production Operations
- Well completion techniques
- Artificial lift systems
- Well stimulation methods
- Field processing and measurement
- Production optimization techniques
Grade B Syllabus
Engineering Disciplines
Senior Officer (Chemical) – CH-02
Core Chemistry Subjects:
1. Inorganic Chemistry
- Chemical bonding and structure
- Transition metal complexes
- Magnetochemistry and electronic spectra
- Organometallic chemistry
- Lanthanides and actinides
2. Organic Chemistry
- Structure and reactivity mechanisms
- Stereochemistry and synthesis planning
- Heterocyclic chemistry
- Polymer chemistry fundamentals
- Natural products chemistry
3. Physical Chemistry
- Thermodynamics and phase rule
- Chemical kinetics and reaction dynamics
- Electrochemistry and surface phenomena
- Solid state chemistry principles
- Colloidal systems
4. Analytical Chemistry
- Spectroscopic methods (UV-Vis, FTIR, NMR)
- Chromatographic techniques
- Mass spectrometry applications
- Microscopy techniques
- X-ray analytical methods
Senior Officer (Chemical Engineering) – CE-03
1. Process Calculations
- Mass and energy balance equations
- Thermodynamic property calculations
- Phase equilibria analysis
- Chemical reaction equilibrium
- Recycle and purge calculations
2. Fluid Mechanics
- Newtonian and non-Newtonian fluids
- Boundary layer theory
- Flow measurement and pumps
- Packed bed and fluidized bed operations
- Pipeline design calculations
3. Heat and Mass Transfer
- Conduction, convection, and radiation
- Heat exchanger design
- Distillation and extraction processes
- Drying and crystallization
- Mass transfer equipment design
4. Chemical Reaction Engineering
- Reaction kinetics and mechanisms
- Ideal reactor design (batch, CSTR, PFR)
- Catalysis and reactor analysis
- Non-isothermal reactor design
Senior Officer (Civil) – CIV-04
Key Topics:
- RCC and steel structural design
- Geotechnical engineering principles
- Transportation engineering
- Water supply and sanitation
- Construction safety measures
- Project planning (CPM, PERT)
- Indian Standards (IS 456, IS 800, IS 1893)
Senior Officer (Electrical) – EE-05
1. Power Systems
- Transmission line parameters
- Load flow and fault analysis
- Protection systems
- HVDC transmission
- Power quality issues
2. Electrical Machines
- DC and AC machine theory
- Transformer design and testing
- Motor drives and control
- Power electronics applications
3. Control Systems
- Transfer function analysis
- Stability criteria
- PID controller design
- State-space methods
Senior Officer (Mechanical) – ME-09
1. Theory of Machines
- Mechanism analysis
- Vibration theory
- Balancing of rotating masses
- Gear trains and flywheels
2. Machine Design
- Failure theories and safety factors
- Power transmission elements
- Bearing design and selection
- Fatigue analysis
3. Thermodynamics
- Steam power cycles
- IC engines and gas turbines
- Refrigeration systems
- Heat transfer principles
Senior Officer (IT) – IT-08
1. Programming and Data Structures
- Object-oriented programming
- Algorithms and complexity analysis
- Database management systems
- Software engineering principles
2. Computer Networks
- OSI and TCP/IP models
- Network security
- Wireless communications
- Cloud computing basics
3. Emerging Technologies
- Machine learning fundamentals
- Big data analytics
- Artificial intelligence concepts
- Cybersecurity principles
Non-Engineering Disciplines
Senior Accounts Officer – AC-07
1. Financial Accounting
- Indian Accounting Standards
- Financial statement preparation
- Internal financial controls
- SEBI regulations
2. Cost Management
- Standard costing and variance analysis
- Capital budgeting techniques
- Transfer pricing methods
- Service sector costing
3. Taxation
- Income Tax Act provisions
- GST law and procedures
- Customs regulations
- Foreign exchange management
4. Auditing
- Audit standards and procedures
- Internal control evaluation
- Risk assessment techniques
- Regulatory compliance
Senior Officer (HR) – HR-16
1. Human Resource Management
- HR planning and job analysis
- Recruitment and selection
- Performance management systems
- Compensation and benefits
2. Industrial Relations
- Labour law compliance
- Trade union relations
- Grievance handling
- Collective bargaining
3. Organizational Behavior
- Motivation theories
- Leadership styles
- Team dynamics
- Change management
Grade A Syllabus
Confidential Secretary – CS-20
1. Typing Skills
- Speed and accuracy requirements
- Business correspondence formats
- Tabular typing and corrections
- Audio transcription
2. Shorthand
- Consonants and vowels
- Phraseography techniques
- Business and technical dictation
- Speed building exercises
3. Office Management
- Filing systems and procedures
- Office equipment operation
- Communication protocols
- Administrative coordination
4. Secretarial Practice
- Company law basics
- Meeting procedures
- Official correspondence
- Record maintenance
Hindi Officer – HO-21
1. Official Language Policy
- Constitutional provisions
- Implementation guidelines
- Government resolutions
- Institutional framework
2. Hindi Literature
- Literary history and movements
- Prominent writers and works
- Modern trends and criticism
- Grammar and usage rules
3. Translation Skills
- Hindi to English translation
- Technical terminology
- Administrative correspondence
- IT tools for Hindi
Preparation Strategy
Section I (General Studies)
General English
- Reading comprehension
- Grammar and vocabulary
- Sentence correction
- Paragraph completion
Reasoning
- Logical reasoning
- Analytical ability
- Data interpretation
- Pattern recognition
Numerical Aptitude
- Basic mathematics
- Data analysis
- Quantitative reasoning
- Problem-solving
Section II (Technical)
Subject-specific Focus Areas:
- Core Concepts: Master fundamental principles
- Application: Practice numerical problems
- Current Trends: Stay updated with industry developments
- Standards: Learn relevant codes and regulations
Study Resources
Recommended Books
- Technical Subjects: Standard engineering textbooks
- General Studies: Competitive exam preparation books
- Current Affairs: Industry magazines and journals
- Previous Papers: Practice with mock tests
Online Resources
- Official OIL website updates
- Professional journals
- Technical databases
- Online test series
Exam Tips
Time Management
- Allocate 45 minutes for Section I
- Reserve 45 minutes for Section II
- Keep buffer time for review
Strategy
- Start with Strong Areas: Build confidence early
- Avoid Guesswork: No negative marking mentioned
- Technical Accuracy: Focus on precise calculations
- Stay Updated: Review recent industry developments
Important Dates Reminder
- Application Deadline: 26 September 2025
- CBT Exam Date: 1 November 2025 (Tentative)
- Admit Card: To be announced
Key Success Factors
Technical Preparation
- Depth over Breadth: Focus on core subjects
- Practice Problems: Solve numerical extensively
- Industry Knowledge: Understand oil and gas operations
- Safety Protocols: Learn HSE regulations
General Preparation
- Language Skills: Improve English proficiency
- Logical Thinking: Practice reasoning regularly
- Speed Building: Develop quick calculation skills
- Mock Tests: Simulate exam conditions
Conclusion
The Oil India Limited CBT syllabus 2025 covers extensive technical and general knowledge areas. Success requires systematic preparation with focus on both theoretical concepts and practical applications. Candidates should create a structured study plan covering all syllabus topics while maintaining regular practice through mock tests.
The comprehensive nature of the syllabus demands consistent effort and strategic preparation. Focus on understanding core concepts rather than rote learning, as the questions are likely to test application-based knowledge.
Stay updated with the official notifications and any syllabus modifications through the OIL website. Regular revision and practice will be key to clearing this competitive examination.