HRRL Syllabus 2026 Out for Assistant Officer, Engineer and other Post Exam pattern and Syllabus topics

Syllabus Summary

Exam Pattern

Selection Process

Important Topics For The Exam

• General Aptitude topics such as Logical Reasoning, Data Interpretation, Quantitative Aptitude, and English Language are common to all posts and should be prioritized.
• Technical topics vary by post and include specialized areas like Digital Logic and Computer Networks for Information Systems, Electrical Circuits and Power Systems for Electrical Engineering, Instrumentation and Automation topics, Chemical Engineering process calculations, and Accounting principles for finance posts.
• Focus on high-weightage subjects like Process Safety for Chemical posts, Operating Systems for IT posts, and Taxation for Accounts posts.
• Revision should emphasize understanding key concepts in your applied post’s technical domain alongside practicing aptitude and reasoning questions.

Preparation Strategy

• Start by thoroughly understanding the syllabus and exam pattern for your respective post.
• Allocate more time to the Technical/Professional Knowledge section as it carries 70% of the marks.
• Practice General Aptitude regularly to build speed and accuracy, especially in reasoning and quantitative aptitude.
• Use official syllabus PDFs and recommended books for in-depth study of technical subjects.
• Take mock tests to simulate exam conditions, identify weak areas, and improve time management skills.
• Revise important formulas, definitions, and concepts periodically to retain information effectively.
• Maintain a balanced study plan with short breaks to avoid burnout and stay motivated.

Recommended Books

Important Links

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

• Intellectual Potential Test: Cognitive abilities like distance, syllogism, logical operations, verbal comprehension, perceptual reasoning, working memory, and fluid reasoning.
• Logical Reasoning & Data Interpretation: Includes puzzles, seating arrangements, coding-decoding, analogies, binary logic, games, order ranking, and data interpretation from charts and tables.
• Quantitative Aptitude: Standard math topics such as number systems, LCM/HCF, ratios, percentages, profit & loss, simple & compound interest, mensuration, time & work, algebraic identities, and data interpretation.
• English Language: Grammar, vocabulary, sentence completion, para jumbles, reading comprehension, synonyms, antonyms, idioms, and proverbs.

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

Assistant Officer - Information Systems (S/G E1)

• Digital Logic: Boolean algebra, combinational & sequential circuits, minimization, number representation, computer arithmetic.
• Computer Organization & Architecture: machine instructions, addressing modes, ALU, pipelining, memory hierarchy, I/O interface.
• Programming and Data Structures: basic Java programming concepts.
• Algorithms: searching, sorting, hashing, complexity, graph algorithms, MST, shortest paths.
• Theory of Computation: regular expressions, automata theory, Turing machines, undecidability.
• Operating Systems: processes, threads, IPC, deadlock, scheduling, memory management, file systems, Windows/Linux basics.
• Databases: ER-model, relational algebra, SQL, normal forms, indexing, transactions, concurrency control.
• Computer Networks: OSI/TCP-IP layers, switching, routing, IP addressing, ARP, DHCP, ICMP, TCP/UDP, DNS, SMTP, HTTP, FTP, Email.

Engineer - Electrical (S/G E2)

• Electric Circuits: network theorems, transient & steady-state analysis, three-phase circuits, power factor.
• Electromagnetic Fields: Coulomb’s law, Gauss’s law, capacitance, Ampere’s & Faraday’s laws, inductance, magnetic circuits.
• Electrical Machines: transformers, DC, induction, synchronous machines, losses, efficiency.
• Power Systems: generation, transmission, distribution, load flow, fault analysis, protection, stability.
• Electrical & Electronic Measurements: bridges, instrument transformers, digital meters, oscilloscopes.
• Power Electronics: thyristors, MOSFET, IGBT, converters, rectifiers, PWM.

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

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

Junior Executive - Chemical (S/G E0)

• Hydrocarbons: alkanes, alkenes, alkynes, aromatics, isomerism, benzene.
• Flammability, explosivity, combustion.
• Polymers: types, reactions, 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, 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.

Engineer - Mechanical (S/G E2)

• Engineering Mechanics, Mechanics of Materials.
• Theory of Machines, Vibrations.
• Machine Design.
• Fluid Mechanics, Heat Transfer.
• Thermodynamics and Industrial Applications.
• Engineering Materials.
• Casting, Forming, Joining Processes.
• Machining, Metrology, Inspection.
• Computer Integrated Manufacturing, Production Planning, Inventory Control.
• Operations Research.
• Power Plant Engineering, Renewable Energy.
• Manufacturing, Industrial, Maintenance Engineering.
• Mechatronics, Robotics.

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

• Process Calculations, Thermodynamics.
• Fluid Mechanics, Mechanical Operations.
• Heat Transfer including Fired Heaters and Furnaces.
• 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.
• Petrochemicals Process: cracking, olefins, aromatics (BTX) production.

Account Officer (S/G E2)

• CA Foundation: Accounting principles, business laws, math, logical reasoning, economics.
• CA Inter: Accounting, laws, cost accounting, taxation (Income Tax, GST), auditing, financial management.
• CA Final: Financial reporting, strategic financial management, advanced auditing, corporate laws, cost management, risk management, taxation.

Assistant Accounts Officer (S/G E1)

• Financial Accounting: accounting standards, depreciation, inventories, share capital, company final accounts.
• Cost Accounting: job costing, process costing, budgeting, variance analysis.
• Taxation: basic income tax, computations, GST.
• Auditing: company audits, divisible profits, tax audit.
• Company Law: company formation, operation, dissolution.

FAQs

Q1. When was the HRRL Syllabus 2026 released?

The HRRL Syllabus 2026 was released on 29 June 2026 on the official portal, hrrl.in/

Q2. How can I check HRRL Syllabus 2026?

You can check your HRRL Syllabus 2026 by visiting hrrl.in/, navigating to Examinations → Syllabus section, selecting the relevant syllabus link, and entering your roll or registration number.

Q3. What is the exam pattern for HRRL CBT 2026?

The HRRL CBT 2026 is a 2-hour, 100-mark exam with 100 objective multiple-choice questions. Each correct answer earns 1 mark, and there is no negative marking.

Q4. How many sections are there in the HRRL syllabus?

There are two parts: Part 1 is General Aptitude (30 marks) common to all posts, and Part 2 is Technical/Professional Knowledge (70 marks) which varies by post.

Q5. Is there negative marking in the HRRL exam?

No, HRRL clearly states there is no negative marking for wrong answers in the CBT.

People Also Ask

• What is the duration of the HRRL Computer-Based Test?
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• How can I download the HRRL syllabus PDF for specific posts?
• Are there any interviews after the HRRL CBT for recruitment?
• What is the marking scheme of the HRRL CBT exam?

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