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HRRL Engineer Chemical Free Mock Test
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HRRL Engineer (Chemical) Syllabus 2026, Exam Pattern
HRRL Engineer (Chemical) Syllabus 2026, Exam Pattern, Exam Date 2026
Detail Information about HRRL has published notification 2026 for the recruitment of Engineer (Chemical) vacancies. Those Candidates who are Interested to the following vacancy and completed all Eligibility Criteria can read the Notification & Apply Online. In this page we provide the Complete Syllabus of this Recruitment with Latest Update Exam Pattern and the Exam Date also.
HRRL Engineer Syllabus 2026 - Overview
HRRL Engineer Syllabus 2026 - Overview
| Organization Name | HPCL Rajasthan Refinery Limited |
| Post Name | Engineer (Chemical) |
| Total Post | 31 |
| Location | Rajasthan |
| Category | Syllabus and Exam Pattern |
| Official Website | hrrl.in |
HRRL Engineer (Chemical) Syllabus 2026
1. Intellectual Potential Test:
1. Distance
2. Syllogism
3. Logical Operations
4. Similarities and dissimilarities
5. Verbal Comprehension
6. Perpetual Reasoning
7. Working Memory
8. Processing Speed
9. Fluid reasoning
2. Logical Reasoning & Data interpretation :
1. Seating arrangements and puzzles
2. Series – verbal and number
3. Relationships
4. Coding-decoding
5. Verbal and numerical Analogy
6. Binary Logic
7. Games and Tournaments
8. Arrangements
9. Team Formations
10. Order and Ranking
11. Table, Data Caselets – Reasoning-Based DI, 3. Column Graphs, Bar Graphs, Line Charts,
12. Pie Charts, Routes and Network
3. Quantitative Aptitude :
The test of QA may cover Number systems including questions on simplification, decimals, fraction, LCM and HCF, square root, divisibility test, Ratio & proportion, Percentage, Average, Profit & loss, Discount, Simple and compound interest, Mensuration, Time & Work, Time and distance, Algebraic identities, Problems on Age, Tables & Graphs etc.
English Language :
1. Idioms and Phrases
2. Sentence Improvement
3. Synonyms
4. Sentence Arrangement
5. Substitution
6. Prepositions
7. Antonyms
8. Fill in the blanks
9. Passage Completion
10. Spotting Errors
11. Substitution
12. Sentence
13. Active and Passive Voice
14. Completion
15. Spelling Test
16. Error Correction (Underlined Part)
17. Transformation
18. Para Completion
19. Joining Sentences
20. Error Correction (Phrase in Bold)
Technical/Professional Subject (Chemical) :
Section 1: Process Calculations and Thermodynamics
Steady and unsteady state mass and energy balances including multiphase, multi-component, reacting and non-reacting systems. Use of tie components; recycle, bypass and purge calculations; Gibb’s phase rule and degree of freedom analysis. First and Second laws of thermodynamics. Applications of first law to close and open systems. Second law and Entropy. Thermodynamic properties of pure substances: Equation of State and residual properties, properties of mixtures: partial molar properties, fugacity, excess properties and activity coefficients; phase equilibria: predicting VLE of systems; chemical reaction equilibrium.
Section 2: Fluid Mechanics and Mechanical Operations
Fluid statics, Newtonian and non-Newtonian fluids, shell-balances including differential form of Bernoulli equation and energy balance, Macroscopic friction factors, dimensional analysis and similitude, flow through pipeline systems, flow meters, pumps and compressors, elementary boundary layer theory, flow past immersed bodies including packed and fluidized beds, Turbulent flow: fluctuating velocity, universal velocity profile and pressure drop. Particle size and shape, particle size distribution, size reduction and classification of solid particles; free and hindered settling; centrifuge and cyclones; thickening and classification, filtration, agitation and mixing; conveying of solids. Principles of Pumps, Compressors and Blowers, Types of Compressors/Pumps and Start/Stop procedures. Flow Measurement devices, Pump performance and characteristics, Pipe flow and pressure loss calculations.
Section 3: Heat Transfer
Steady and unsteady heat conduction, convection and radiation, thermal boundary layer and heat transfer coefficients, boiling, condensation and evaporation; types of heat exchangers and evaporators and their process calculations. Design of double pipe, shell and tube heat exchangers, and single and multiple effect evaporators. Operation of Fired Heaters, Different types and its significance. Calculation of Heat Balance across Heat Exchanger, Different types of Furnaces and its Operation, Furnace light up procedure, critical parameters for steady operation.
Section 4: Mass Transfer
Fick’s laws, molecular diffusion in fluids, mass transfer coefficients, film, penetration and surface renewal theories; momentum, heat and mass transfer analogies; stage-wise and continuous contacting and stage efficiencies; HTU & NTU concepts; design and operation of equipment for distillation, absorption, leaching, liquid-liquid extraction, drying, humidification, dehumidification and adsorption.
Distillation column working practical approach, Critical Operating parameters in a Distillation column/Strippers/Absorbers/Reflux drum, KOD, Surge drum etc., Absorption and Stripping, Extraction, Adsorption, Diffusion-Controlled Processes.
Section 5: Chemical Reaction Engineering
Theories of reaction rates; kinetics of homogeneous reactions, interpretation of kinetic data, single and multiple reactions in ideal reactors, non-ideal reactors; residence time distribution, single parameter model; non-isothermal reactors; kinetics of heterogeneous catalytic reactions; diffusion effects in catalysis. Reactor Design and types, Plug flow reactor working principle, LHSV, Residence time distribution, Chemical equilibrium and Reaction Thermodynamics, Catalyst role in chemical reactions.
Section 6: Instrumentation and Process Control
Measurement of process variables; sensors, transducers and their dynamics, process modeling and linearization, transfer functions and dynamic responses of various systems, systems with inverse response, process reaction curve, controller modes (P, PI, and PID); control valves; analysis of closed loop systems including stability, frequency response, controller tuning, cascade and feed forward control.
Types of instrument sensors and their applications, Calibration of instruments, PID controller tuning and optimisations, Distributed Control Systems (DCS), Programmable Logic Controllers(PLC), Troubleshooting and Maintenance of Instrumentation systems, Control loops performance monitoring.
Section 7: Plant Design and Economics
Principles of process economics and cost estimation including depreciation and total annualized cost, cost indices, rate of return, payback period, discounted cash flow, optimization in process design and sizing of chemical engineering equipment’s such as compressors, heat exchangers, multistage contactors.
Process Flow Diagram/Piping & Instrumentation Diagram of process plant, knowledge of Plant Layout and equipment design, Material Selection and Corrosion Control, Economic Evaluation Techniques, Risk Analysis and Safety Engineering, Energy Efficiency and Optimization.
Section 8: Chemical Technology
Natural products industries (Pulp and Paper, Sugar, Oil, and Fats); petroleum refining and petrochemicals; polymerization industries (polyethylene, polypropylene, PVC and polyester synthetic fibers).
Practical approach of natural and synthesized petrochemicals/Polymers, Process Design and Optimization, Catalysis and Reaction Engineering, Separation Techniques, Polymers and Material Science, Nanotechnology in Chemical Engineering
Section 9: Net Zero Concepts
Industrial Decarbonization, renewable energies, environmental controls and monitoring, Sustainable Supply Chain Management, Carbon Capture, Utilization, and Storage (CCUS).
Section 10: Process Safety
Key elements of Process Safety Management, Chemical Safety, Hazards and controls for chemical reactions, Fire and Explosion related incidents and mitigation measures, Safe startup and shutdown of process units.
Hazard Identification and Risk Assessment, Process Safety Management (PSM) Regulations, Operational Safety Procedures, Process Safety Metrics and Performance Monitoring, Emergency Response Planning.
Section 11: Introduction to Petrochemicals process
Overview of the Petrochemical Industry, Classification of Petrochemicals, Key Raw Materials: Crude Oil, Natural Gas, Naphtha, LPG, Naphtha as a Petrochemical Feedstock, Cracking Processes like Steam Cracking (for Ethylene, Propylene, Butadiene),Pyrolysis Gasoline Hydrogenation Unit (PGHU), Olefin Saturation.
Types of Catalysts such as , Ziegler-Natta Catalysts, Production of Olefins, Ethylene, Propylene, and Butadiene Production, Naphtha Cracking (NCI – Naphtha Cracking Index),Separation and Purification of Olefins, Applications of Olefins in Polymer Production (e.g., Polyethylene, Polypropylene).Production of Aromatics (BTX), Benzene, Toluene, Xylene Production from Catalytic Reforming, Pyrolysis Gasoline Processing for Aromatics Recovery
HRRL Engineer (Chemical) Exam Pattern 2026
Duration : 120 Minutes
| S.No. | Subject | No.of Question | Marks |
| Part 1 | General Aptitude comprising of English Language, Quantitative Aptitude Test & Intellectual Potential test (Logical Reasoning and Data Interpretation) |
30 | 30 |
| Part 2 | Technical / Professional Knowledge (Chemical) | 70 | 70 |
| Total | 100 | 100 |
Exam Date 2026 : Update Soon
Starting Date of Application Form : 14th May 2026
Last Date of Application Form : 03rd June 2026
Total Post : 31
Starting Date of Application Form : 14th May 2026
Last Date of Application Form : 03rd June 2026
Total Post : 31
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