HRRL Syllabus 2026: Complete Exam Pattern & Subject-Wise Topics for All 9 Posts

HRRL CBT Exam Syllabus 2026: Detailed Overview

HPCL Rajasthan Refinery Limited (HRRL) has officially released the detailed syllabus for its Computer Based Test (CBT) under Advt. No. HRRL/RECT/01/2026. The recruitment covers nine distinct posts: Assistant Officer (Information Systems), Engineer (Electrical, Mechanical, Instrumentation, Chemical), Assistant Engineer (Instrumentation), Junior Executive (Chemical), Account Officer, and Assistant Accounts Officer. Every CBT follows a unified structure—2-hour duration, 100 objective questions worth 100 marks, and no negative marking. This article provides a complete breakdown of the exam pattern, marks distribution, and subject-wise topics for each post, enabling candidates to plan their preparation effectively.

About HPCL Rajasthan Refinery Limited (HRRL) Recruitment 2026

HRRL is a joint venture between Hindustan Petroleum Corporation Limited (HPCL) and the Government of Rajasthan, established to set up a state-of-the-art refinery in Barmer, Rajasthan. The 2026 recruitment drive aims to fill various technical, engineering, and finance positions through a rigorous selection process. The CBT is the first stage, followed by skill tests or interviews as applicable. Understanding the syllabus thoroughly is crucial for candidates aiming to secure these prestigious roles in India's energy sector.

HRRL CBT Exam Pattern 2026

The exam pattern is consistent across all nine posts, with the technical section varying by discipline. Below is the detailed structure:

HRRL Subject-Wise Syllabus: General Aptitude (Common for All Posts)

The General Aptitude section is identical across all HRRL posts and is set at Graduate level (HSC level for Junior Executive - Chemical). It tests reasoning ability, quantitative skills, and English language proficiency.

HRRL Syllabus: Intellectual Potential Test

• Distance
• Syllogism
• Logical Operations
• Similarities and Dissimilarities
• Verbal Comprehension
• Perceptual Reasoning
• Working Memory
• Processing Speed
• Fluid Reasoning

HRRL Syllabus: Logical Reasoning & Data Interpretation

• Seating Arrangements and Puzzles
• Series - Verbal and Number
• Relationships, Coding-Decoding
• Verbal and Numerical Analogy
• Binary Logic
• Games and Tournaments, Team Formations
• Order and Ranking, Arrangements
• Table and Data Caselets, Column Graphs, Bar Graphs, Line Charts, Pie Charts, Routes and Networks

HRRL Syllabus: Quantitative Aptitude

• Number Systems, Simplification, Decimals, Fractions
• LCM and HCF, Square Root, Divisibility Tests
• Ratio & Proportion, Percentage, Average
• Profit & Loss, Discount
• Simple and Compound Interest
• Mensuration, Time & Work, Time and Distance
• Algebraic Identities, Problems on Ages, Tables & Graphs

HRRL Syllabus: English Language

• Grammar: Question Tags, Parts of Speech (Adjective, Adverb, Preposition, Conjunction, Verb) via Sentence Completion
• Indirect Writing: Syntax and Structure (Para Jumbles), One-Word Substitution
• Reading Comprehension: Appropriate Title, Central Theme, Facts, Inferences, Passage Structure, Summary, Tone, Text-to-World Connection
• Vocabulary: Synonyms, Antonyms, Word Meaning, Idioms and Phrases, Proverbs (Word-Segment Substitution)

HRRL Subject-Wise Syllabus: Technical/Professional Knowledge (Post-Wise)

The technical section carries 70 marks and is specific to each discipline. Below are the detailed topic lists for all nine posts.

HRRL Syllabus: Assistant Officer - Information Systems (S/G E1)

• Digital Logic: Boolean algebra, combinational and sequential circuits, minimization, number representation, computer arithmetic
• Computer Organization & Architecture: machine instructions, addressing modes, ALU, data-path, control unit, pipelining, memory hierarchy, I/O interface
• Programming and Data Structures: modern programming concepts (basic Java)
• Algorithms: searching, sorting, hashing, asymptotic complexity, greedy/DP/divide-and-conquer, graph traversals, MST, shortest paths
• Theory of Computation: regular expressions, finite automata, context-free grammars, push-down automata, Turing machines, undecidability
• Operating Systems: system calls, processes, threads, IPC, concurrency, deadlock, scheduling, memory management, file systems, Windows/Linux basics
• Databases: ER-model, relational algebra, SQL, normal forms, indexing (B/B+ trees), transactions, concurrency control
• Computer Networks: OSI/TCP-IP layering, switching, data link layer, routing protocols, IP addressing/CIDR, ARP/DHCP/ICMP/NAT, TCP/UDP, DNS/SMTP/HTTP/FTP/Email

HRRL Syllabus: Engineer - Electrical (S/G E2)

• Electric Circuits: network elements, KCL/KVL, node/mesh analysis, transient and steady-state response, three-phase circuits, power factor
• Electromagnetic Fields: Coulomb's law, Gauss's law, capacitance, Ampere's/Faraday's law, inductance, magnetic circuits
• Electrical Machines: transformers, DC machines, induction machines, synchronous machines, losses and efficiency
• Power Systems: generation, transmission, distribution, load flow, fault analysis, protection, circuit breakers, stability
• Electrical & Electronic Measurements: bridges, instrument transformers, digital meters, oscilloscopes, error analysis
• Power Electronics: thyristor/MOSFET/IGBT, DC-DC converters, rectifiers, inverters, PWM

HRRL Syllabus: Engineer - Instrumentation (S/G E2) & Assistant Engineer - Instrumentation (S/G E1)

• Electrical & Electronics Measurement, Analog and Digital Electronics
• Transducers, sensors, actuators and industrial automation
• Automatic Control Systems and Feedback Control
• Process Loop Components and Hazardous Area Classification
• Microprocessors and Microcontrollers
• Power Electronics and Drives
• Industrial Automation, PLC, SCADA, and Distributed Control Systems
• Analytical Instrumentation and Instrumentation System Design
• Optimization, Process Instrumentation and Control
• Programming Engineering and Project Management (only in Engineer - Instrumentation)
• Industrial Internet of Things (IIoT) and Industry 4.0
• Soft Computing, AI and Machine Learning for Process Control

HRRL Syllabus: Junior Executive - Chemical (S/G E0)

• Hydrocarbons: alkanes, alkenes, alkynes, aromatic compounds, isomerism, benzene structure
• Flammability, explosivity and combustion
• Polymers: types, reactions and properties
• Heat Transfer Equipment: heat exchangers, evaporators, fired heaters
• Process Equipment Operation: pumps, compressors, distillation towers, reactors
• Process Instrumentation and Control Systems
• Process Safety: PSM, JSA, HAZOP, hazard identification and risk assessment
• Firefighting Equipment: fire pumps, gas detectors, extinguishers, foam systems, hoses, ladders
• Utility Systems: air, water, steam, nitrogen
• Chemical Thermodynamics, Fluid Mechanics, Heat & Mass Transfer
• Unit Conversion & Stoichiometry

HRRL Syllabus: Engineer - Mechanical (S/G E2)

• Engineering Mechanics and Mechanics of Materials
• Theory of Machines and Vibrations
• Machine Design
• Fluid Mechanics and Heat Transfer
• Thermodynamics and its industrial applications (IC engines, refrigeration, turbomachinery)
• Engineering Materials
• Casting, Forming and Joining Processes
• Machining, Metrology and Inspection
• Computer Integrated Manufacturing, Production Planning and Inventory Control
• Operations Research
• Power Plant Engineering and Renewable Energy Sources
• Manufacturing, Industrial and Maintenance Engineering
• Mechatronics and Robotics

HRRL Syllabus: Engineer - Chemical (Process) (S/G E2)

• Process Calculations and Thermodynamics
• Fluid Mechanics and Mechanical Operations
• Heat Transfer (including fired heaters and furnace operations)
• Mass Transfer (distillation, absorption, extraction, drying)
• Chemical Reaction Engineering
• Instrumentation and Process Control (DCS, PLC, PID tuning)
• Plant Design and Economics
• Chemical Technology (petroleum refining, petrochemicals, polymers)
• Net Zero Concepts: decarbonization, CCUS, renewable energy
• Process Safety: PSM, hazard identification, emergency response
• Introduction to Petrochemicals Process: cracking, olefins, aromatics (BTX) production

HRRL Syllabus: Account Officer (S/G E2)

• CA Foundation: Principles and Practices of Accounting, Business Laws, Business Mathematics, Logical Reasoning & Statistics, Business Economics
• CA Inter: Accounting, Corporate & Other Laws, Cost and Management Accounting, Taxation (Income Tax and GST), Advanced Accounting, Auditing and Assurance, Enterprise Information Systems and Strategic Management, Financial Management and Economics for Finance
• CA Final: Financial Reporting, Strategic Financial Management, Advanced Auditing and Professional Ethics, Corporate and Economic Laws, Strategic Cost Management, Risk Management, Financial Services and Capital Markets, International Taxation, Multidisciplinary Case Study, Direct and Indirect Tax Laws

HRRL Syllabus: Assistant Accounts Officer (S/G E1)

• Financial Accounting: accounting standards, depreciation, inventories, revenue recognition, share capital, bonus/rights shares, ESOPs, buy-back, company final accounts, amalgamation
• Cost Accounting: job costing, process costing, activity-based costing, budgeting, standard costing, variance analysis, responsibility accounting
• Taxation: Income Tax basics, computation of income, set-off and carry forward of losses, deductions, GST provisions
• Auditing: company audit, divisible profits, dividends, tax audit
• Company Law: formation, operation and dissolution of a company

HRRL Complete Selection Scheme

The selection process for HRRL recruitment typically involves a Computer Based Test (CBT) followed by a skill test or interview, depending on the post. The CBT is a qualifying stage where candidates must secure a minimum cutoff to proceed. For engineering and officer posts, shortlisted candidates may be called for a personal interview or group discussion. The final merit list is prepared based on combined performance in the CBT and subsequent stages. Candidates are advised to refer to the official notification for post-specific selection details.

How to Clear HRRL Written Exam

To excel in the HRRL CBT, candidates should adopt a strategic preparation approach. Start by thoroughly understanding the exam pattern and weightage of each section. Focus on strengthening fundamentals in the technical subjects relevant to your post. For the General Aptitude section, practice regularly with mock tests to improve speed and accuracy. Utilize the official syllabus PDFs to cover all topics systematically. Recommended resources include standard textbooks for engineering disciplines (e.g., 'Electrical Machines' by P.S. Bimbhra for electrical posts) and CA study material for finance roles. Solve previous year papers and take online quizzes to assess your preparation. Time management is key—allocate more time to the 70-mark technical section while maintaining consistent practice in aptitude. Joining online study groups or following HRRL updates can also provide valuable insights.

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