HRRL Syllabus 2026 Out for Assistant Officer, Engineer in addition to other Post Test structure as well as Syllabus topics

HRRL CBT Exam Pattern 2026 - Overview

Before diving into post-wise topics, it helps to understand that HRRL uses the same exam framework across all nine posts; only the technical section changes. This section explains the marks split, duration, as well as marking scheme applicable to every position.

Part 1: General Aptitude Syllabus (30 Marks) - Common to All Posts

The General Aptitude section is identical across all HRRL posts as well as is set at Graduate level (HSC level for Junior Executive - Chemical). It tests reasoning ability, quantitative skills, along with English language proficiency, as well as is divided into four broad areas.

The official notification states that, 1. Intellectual Potential Test

This part evaluates core cognitive abilities rather than memorized facts, focusing on how quickly as well as accurately a candidate can process information.

Distance

Syllogism

Logical Operations

The conducting body has announced that, Similarities in addition to dissimilarities

Verbal Comprehension

According to the latest notice, Perpetual (Perceptual) Reasoning

Working Memory

It is informed that, Processing Speed

As per the official update, Fluid Reasoning

2. Logical Reasoning & Data Interpretation

Interested applicants should know that, This section combines puzzle-based logical reasoning with data interpretation involving graphs, tables, as well as charts.

Candidates should note that, Seating arrangements as well as puzzles

The department has confirmed that, Series - verbal in addition to number

Relationships, coding-decoding

Verbal along with numerical analogy

Binary logic

Interested applicants should know that, Games along with tournaments, team formations

Order in addition to ranking, arrangements

Aspirants are advised that, Table as well as data caselets, column graphs, bar graphs, line charts, pie charts, routes as well as networks

It is informed that, 3. Quantitative Aptitude

This part covers standard mathematics topics commonly seen in competitive exams, testing numerical accuracy in addition to problem-solving speed.

Number systems, simplification, decimals, fractions

LCM along with HCF, square root, divisibility tests

Ratio & proportion, percentage, average

Profit & loss, discount

Simple along with compound interest

The conducting body has announced that, Mensuration, time & work, time as well as distance

Algebraic identities, problems on ages, tables & graphs

4. English Language

Aspirants are advised that, The English section tests grammar, vocabulary, as well as reading comprehension through sentence completion, para jumbles, as well as passage-based questions.

Grammar: question tags, parts of speech (adjective, adverb, preposition, conjunction, verb) via sentence completion

Indirect writing: syntax along with structure (para jumbles), one-word substitution

Interested applicants should know that, Reading comprehension: appropriate title, central theme, facts, inferences, passage structure, summary, tone, text-to-world connection

Interested applicants should know that, Vocabulary: synonyms, antonyms, word meaning, idioms as well as phrases, proverbs (word-segment substitution)

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Part 2: Technical/Professional Knowledge Syllabus (70 Marks) - Post-Wise Breakdown

The technical section carries the bulk of the marks in addition to is specific to each discipline. Below is the detailed topic list for each of the nine HRRL posts.

1. Assistant Officer - Information Systems (S/G E1)

This syllabus covers core computer science fundamentals typically expected at the graduate/engineering level for IT roles.

Digital Logic: Boolean algebra, combinational as well as 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 as well as Data Structures: modern programming concepts (basic Java)

Algorithms: searching, sorting, hashing, asymptotic complexity, greedy/DP/divide- along with -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

2. Engineer - Electrical (S/G E2)

The Electrical Engineering syllabus spans circuit theory, machines, power systems, as well as power electronics relevant to refinery operations.

Electric Circuits: network elements, KCL/KVL, node/mesh analysis, transient along with 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 as well as efficiency

The conducting body has announced that, 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

3. Engineer - Instrumentation (S/G E2) in addition to Assistant Engineer - Instrumentation (S/G E1)

Both instrumentation posts share an extensive syllabus covering measurement, control systems, automation, in addition to emerging technologies like IIoT in addition to machine learning for process control.

Electrical & Electronics Measurement, Analog as well as Digital Electronics

Transducers, sensors, actuators as well as industrial automation

The conducting body has announced that, Automatic Control Systems as well as Feedback Control

Process Loop Components along with Hazardous Area Classification

The official notification states that, Microprocessors as well as Microcontrollers

Power Electronics as well as Drives

Industrial Automation, PLC, SCADA, in addition to Distributed Control Systems

Analytical Instrumentation as well as Instrumentation System Design

The department has confirmed that, Optimization, Process Instrumentation as well as Control

Candidates should note that, Programming Engineering in addition to Project Management (only in Engineer - Instrumentation)

Aspirants are advised that, Industrial Internet of Things (IIoT) in addition to Industry 4.0

Interested applicants should know that, Soft Computing, AI in addition to Machine Learning for Process Control

4. Junior Executive - Chemical (S/G E0)

This entry-level chemical syllabus focuses on hydrocarbons, process equipment, safety, along with firefighting basics relevant to refinery operations.

It is informed that, Hydrocarbons: alkanes, alkenes, alkynes, aromatic compounds, isomerism, benzene structure

Interested applicants should know that, Flammability, explosivity as well as combustion

As per the official update, Polymers: types, reactions as well as properties

Heat Transfer Equipment: heat exchangers, evaporators, fired heaters

Process Equipment Operation: pumps, compressors, distillation towers, reactors

Process Instrumentation as well as Control Systems

Process Safety: PSM, JSA, HAZOP, hazard identification along with 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

The conducting body has announced that, 5. Engineer - Mechanical (S/G E2)

The Mechanical Engineering syllabus is comprehensive, covering core mechanics, thermal sciences, manufacturing, in addition to mechatronics.

The conducting body has announced that, Engineering Mechanics in addition to Mechanics of Materials

Theory of Machines in addition to Vibrations

Candidates should note that, Machine Design

Fluid Mechanics in addition to Heat Transfer

Thermodynamics along with its industrial applications (IC engines, refrigeration, turbomachinery)

Interested applicants should know that, Engineering Materials

The department has confirmed that, Casting, Forming along with Joining Processes

Machining, Metrology along with Inspection

Computer Integrated Manufacturing, Production Planning as well as Inventory Control

Operations Research

As per the official update, Power Plant Engineering as well as Renewable Energy Sources

It is informed that, Manufacturing, Industrial in addition to Maintenance Engineering

According to the latest notice, Mechatronics along with Robotics

6. Engineer - Chemical (Process) (S/G E2)

This is the most extensive technical syllabus among all posts, covering core chemical engineering principles along with refinery-specific process knowledge.

Process Calculations as well as Thermodynamics

Fluid Mechanics along with Mechanical Operations

Heat Transfer (including fired heaters in addition to furnace operations)

Mass Transfer (distillation, absorption, extraction, drying)

Chemical Reaction Engineering

Instrumentation as well as Process Control (DCS, PLC, PID tuning)

Plant Design as well as Economics

It is informed that, 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

7. Account Officer (S/G E2)

The Account Officer syllabus is based on the CA Foundation, CA Inter, in addition to CA Final curriculum, covering accounting, taxation, auditing, in addition to financial management.

CA Foundation: Principles along with Practices of Accounting, Business Laws, Business Mathematics, Logical Reasoning & Statistics, Business Economics

CA Inter: Accounting, Corporate & Other Laws, Cost in addition to Management Accounting, Taxation (Income Tax in addition to GST), Advanced Accounting, Auditing along with Assurance, Enterprise Information Systems as well as Strategic Management, Financial Management in addition to Economics for Finance

CA Final: Financial Reporting, Strategic Financial Management, Advanced Auditing along with Professional Ethics, Corporate in addition to Economic Laws, Strategic Cost Management, Risk Management, Financial Services as well as Capital Markets, International Taxation, Multidisciplinary Case Study, Direct in addition to Indirect Tax Laws

8. Assistant Accounts Officer (S/G E1)

The conducting body has announced that, This syllabus focuses on practical financial accounting, cost accounting, taxation, auditing, in addition to company law concepts.

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 along with carry forward of losses, deductions, GST provisions

It is informed that, Auditing: company audit, divisible profits, dividends, tax audit

Candidates should note that, Company Law: formation, operation along with dissolution of a company

HRRL Syllabus PDF Download Links 2026

Applicants may obtain the departmental post-wise syllabus PDFs directly from the HRRL website using the links below.

Assistant Officer - Information Systems 2026

The department has confirmed that, Engineer - Electrical 2026

Engineer - Instrumentation 2026

According to the latest notice, Junior Executive - Chemical 2026

Account Officer 2026

The conducting body has announced that, Assistant Accounts Officer 2026

Engineer - Mechanical 2026

Assistant Engineer - Instrumentation 2026

Engineer - Chemical 2026