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ONGC Assistant Executive Engineer Syllabus 2026, Exam Pattern

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ONGC Assistant Executive Engineer Syllabus 2026, Exam Pattern

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ONGC Assistant Executive Engineer (Mechanical) Exam - Hindi85 questions • 120 mins • 85 marks
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ONGC Assistant Executive Engineer (Mechanical) Exam - English85 questions • 120 mins • 85 marks
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ONGC Assistant Executive Engineer (Mechanical) Exam - Hindi85 questions
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ONGC Assistant Executive Engineer Syllabus 2026, Exam Pattern

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ONGC Assistant Executive Engineer Syllabus 2026, Exam Pattern, Exam Date 2026

Detail Information about ONGC has published notification 2026 for the recruitment of Assistant Executive Engineer 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.

ONGC Assistant Executive Engineer Recruitment 2026 - Overview
 
Organization Name Oil and Natural Gas Corporation Limited (ONGC)
Name of Post Assistant Executive Engineer (Drilling-Mechanical / Production-Chemical)
Number of Vacancies Notified Soon
Exam Date 2026 Notified Soon
Application Mode online
Category Syllabus and Exam Pattern
Official Website ongcindia.com

ONGC Assistant Executive Engineer Syllabus 2026

General Awareness

1. Important Days
2. Abbreviations
3. Awards and Honors
4. Major Financial/Economic News
5. Science – Inventions and Discoveries
6. Books and Authors
7. Budget and Five Year Plans
8. Sports
9. Current Affairs (National and International)
10. International and National Organizations

Aptitude

 
1. Operations
2. Fractions
3. Ratios
4. Graphs
5. Time
6. Speed
7. Distance
8. Profit and loss calculations
 
General English :
 
1. Covering active and passive voice
2. Cloze tests
3. Idioms and phrases
4. Reading comprehension
5. Synonyms
6. Antonyms
 
Mechanical Engineering :
 
Engineering Mathematics :
 
1. Linear Algebra: Matrix algebra, systems of linear equations, eigen values and eigen vectors.
2. Calculus: Functions of single variable, limit, continuity and differentiability, mean value theorems, indeterminate forms; evaluation of definite and improper integrals; double and triple integrals; partial derivatives, total derivative, Taylor series (in one and two variables), maxima and minima, Fourier series; gradient, divergence and curl, vector identities, directional derivatives, line, surface and volume integrals, applications of Gauss, Stokes and Green’s theorems.
3. Differential Equations: First order equations (linear and nonlinear); higher order linear differential equations with constant coefficients; Euler-Cauchy equation; initial and boundary value problems; Laplace transforms; solutions of heat, wave and Laplace's equations.
4. Complex Variables: Analytic functions; Cauchy-Riemann equations; Cauchy’s integral theorem and integral formula; Taylor and Laurent series.
5. Probability and Statistics: Definitions of probability, sampling theorems, conditional probability; mean, median, mode and standard deviation; random variables, binomial, Poisson and normal distributions.
6. Numerical Methods: Numerical solutions of linear and non-linear algebraic equations; integration by trapezoidal and Simpson’s rules; single and multi-step methods for differential equations.
 
Applied Mechanics and Design :
 
1. Engineering Mechanics: Free-body diagrams and equilibrium; friction and its applications including rolling friction, belt-pulley, brakes, clutches, screw jack, wedge, vehicles, etc.; trusses and frames; virtual work; kinematics and dynamics of rigid bodies in plane motion; impulse and momentum (linear and angular) and energy formulations; Lagrange’s equation.
2. Mechanics of Materials: Stress and strain, elastic constants, Poisson's ratio; Mohr’s circle for plane stress and plane strain; thin cylinders; shear force and bending moment diagrams; bending and shear stresses; concept of shear centre; deflection of beams; torsion of circular shafts; Euler’s theory of columns; energy methods; thermal stresses; strain gauges and rosettes; testing of materials with universal testing machine; testing of hardness and impact strength.
3. Theory of Machines: Displacement, velocity and acceleration analysis of plane mechanisms; dynamic analysis of linkages; cams; gears and gear trains; flywheels and governors; balancing of reciprocating and rotating masses; gyroscope.
4. Vibrations: Free and forced vibration of single degree of freedom systems, effect of damping; vibration isolation; resonance; critical speeds of shafts.
Machine Design: Design for static and dynamic loading; failure theories; fatigue strength and the S-N diagram; principles of the design of machine elements such as bolted, riveted and welded joints; shafts, gears, rolling and sliding contact bearings, brakes and clutches, springs.
 
Fluid Mechanics and Thermal Sciences :
 
1. Fluid Mechanics: Fluid properties; fluid statics, forces on submerged bodies, stability of floating bodies; control-volume analysis of mass, momentum and energy; fluid acceleration; differential equations of continuity and momentum; Bernoulli’s equation; dimensional analysis; viscous flow of incompressible fluids, boundary layer, elementary turbulent flow, flow through pipes, head losses in pipes, bends and fittings; basics of compressible fluid flow.
2. Transfer: Modes of heat transfer; one dimensional heat conduction, resistance concept and electrical analogy, heat transfer through fins; unsteady heat conduction, lumped parameter system, Heisler's charts; thermal boundary layer, dimensionless parameters in free and forced convective heat transfer, heat transfer correlations for flow over flat plates and through pipes, effect of turbulence; heat exchanger performance, LMTD and NTU methods; radiative heat transfer, Stefan- Boltzmann law Wien's displacement law, black and grey surfaces, view factors, radiation network analysis
3. Thermodynamics: Thermodynamic systems and processes; properties of pure substances, behavior of ideal and real gases; zeroth and first laws of thermodynamics, calculation of work and heat in various processes; second law of thermodynamics; thermodynamic property charts and tables, availability and irreversibility; thermodynamic relations.
4. Applications: Power Engineering: Air and gas compressors; vapour and gas power cycles, concepts of regeneration and reheat. I.C. Engines: Air-standard Otto, Diesel and dual cycles. Refrigeration and airconditioning: Vapour and gas refrigeration and heat pump cycles; properties of moist air, psychrometric chart, basic psychrometric processes.
5. Turbomachinery: Impulse and reaction principles, velocity diagrams, Pelton-wheel, Francis and Kaplan turbines; steam and gas turbines.
 
Materials, Manufacturing and Industrial Engineering :
 
1. Engineering Materials: Structure and properties of engineering materials, phase diagrams, heat treatment, stress-strain diagrams for engineering materials.
2. Casting, Forming and Joining Processes: Different types of castings, design of patterns, moulds and cores; solidification and cooling; riser and gating design. Plastic deformation and yield criteria; fundamentals of hot and cold working processes; load estimation for bulk (forging, rolling, extrusion, drawing) and sheet (shearing, deep drawing, bending) metal forming processes; principles of powder metallurgy. Principles of welding, brazing, soldering and adhesive bonding.
3. Machining and Machine Tool Operations: Mechanics of machining; basic machine tools; single and multi-point cutting tools, tool geometry and materials, tool life and wear; economics of machining; principles of non-traditional machining processes; principles of work holding, jigs and fixtures; abrasive machining processes; NC/CNC machines and CNC programming.
4. Metrology and Inspection: Limits, fits and tolerances; linear and angular measurements; comparators; interferometry; form and finish measurement; alignment and testing methods; tolerance analysis in manufacturing and assembly; concepts of coordinate-measuring machine (CMM).
5. Computer Integrated Manufacturing: Basic concepts of CAD/CAM and their integration tools; additive manufacturing.
6. Production Planning and Control: Forecasting models, aggregate production planning, scheduling, materials requirement planning; lean manufacturing.
7. Inventory Control: Deterministic models; safety stock inventory control systems.
8. Operations Research: Linear programming, simplex method, transportation, assignment, network flow models, simple queuing models, PERT and CPM.
 
Application in Oil & Gas Business :
 
1. Operation & maintenance of Surface facilities (Separator, heater treater, crude stabilization, Storage tank, static equipment, compressor & pumps etc.), Operation of Group gathering stations, offshore Platforms, Artificial lift technology (Gas lift, sucker rod pumps etc).
2. Processing and recovery of value-added product (LPG, Naptha, C2, C3 etc.), Gas sweetening operations, Gas dehydration operations etc.
3. Work over Rig operations, well head maintenance, Well completion & Testing etc. Various types of well stimulation services (hydro-fracturing, Nitrogen Job, Acid job).
4. Project management, oil & gas pipeline, Health Safety & Environment related knowledge in oil & gas sector.
 
Chemical Engineering :
 
Engineering Mathematics :
 
1. Linear Algebra: Matrix algebra, Systems of linear equations, Eigen values and eigenvectors.
2. Calculus: Functions of single variable, Limit, continuity and differentiability, Taylor series, Mean value theorems, Evaluation of definite and improper integrals, Partial derivatives, Total derivative, Maxima and minima, Gradient, Divergence and Curl, Vector identities, Directional derivatives, Line, Surface and Volume integrals, Stokes, Gauss and Green’s theorems.
3. Differential Equations: First order equations (linear and nonlinear), Higher order linear differential equations with constant coefficients, Cauchy’s and Euler’s equations, Initial and boundary value  problems, Laplace transforms, Solutions of one-dimensional heat and wave equations and Laplace equation.
4. Complex Variables: Complex number, polar form of complex number, triangle inequality.
Probability and Statistics: Definitions of probability and sampling theorems, Conditional probability, Mean, median, mode and standard deviation, Random variables, Poisson, Normal and Binomial distributions, Linear regression analysis.
5. Numerical Methods: Numerical solutions of linear and non-linear algebraic equations. Integration by trapezoidal and Simpson’s rule. Single and multi-step methods for numerical solution of differential equations.
 
Process Calculations and Thermodynamics :
 
1. 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.
2. First and Second laws of thermodynamics. Applications of first law to close and open systems. Second law and Entropy.
3. 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.
 
Fluid Mechanics and Mechanical Operations :
 
1. Fluid statics, surface tension, Newtonian and non-Newtonian fluids, transport properties,shell- balances including differential form of Bernoulli equation and energy balance, equation of continuity, equation of motion, equation of mechanical energy, Macroscopic friction factors, dimensional analysis and similitude, flow through pipeline systems, velocity profiles, 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.
2. 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.
 
Heat Transfer :
 
Equation of energy, 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.

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, membrane separations (micro-filtration, ultra-filtration, nano- filtration and reverse osmosis).
 
Chemical Reaction Engineering :
 
Theories of reaction rates; kinetics of homogeneous reactions, interpretation of kinetic data, single and multiple reactions in ideal reactors, kinetics of enzyme reactions (Michaelis-Mentenand Monod models), non-ideal reactors; residence time distribution, single parameter model; non- isothermal reactors; kinetics of heterogeneous catalytic reactions; diffusion effects in catalysis; rate and performance equations for catalyst deactivation.
 
Instrumentation and Process Control :
 
Measurement of process variables; sensors and transducers; P&ID equipment symbols; 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; transducer dynamics; analysis of closed loop systems including stability, frequency response, controller tuning, cascade and feed forward control.
 
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 equipments such as heat exchangers and multistage contactors.

Chemical Technology :
 
Inorganic chemical industries (sulfuric acid, phosphoric acid, chlor-alkali industry), fertilizers (Ammonia, Urea, SSP and TSP); natural products industries (Pulp and Paper, Sugar, Oil, and Fats); petroleum refining and petrochemicals; polymerization industries (polyethylene, polypropylene, PVC and polyester synthetic fibers).

Application in Oil & Gas Business :

1. Operation & maintenance of Surface facilities (Separator, heater treater, crude stabilization, Storage tank, static equipment, compressor & pumps etc.), Operation of Group gathering stations, offshore Platforms, Artificial lift technology (Gas lift, sucker rod pumps etc).
3. Processing and recovery of value-added product (LPG, Naptha, C2, C3 etc.), Gas sweetening operations, Gas dehydration operations etc.
4. Work over Rig operations, well head maintenance, Well completion & Testing etc. Various types of well stimulation services (hydro-fracturing, Nitrogen Job, Acid job).
5. Project management, oil & gas pipeline, Health Safety & Environment related knowledge in oil & gas sector.

ONGC Assistant Executive Engineer Syllabus 2026

Duartion : 120 Minutes

 
S.No SUbject No.of QUestion Marks
1 Concerned Domain (Drilling-Mechanical / Production-Chemical) 40 40
2 General Awareness 10 10
3 Aptitude Test 25 25
4 English Language 10 10
  Total 85 85
 
ONGC AEE Exam Date 2026 : Notified Soon

Starting Date of Application Form : Notified Soon

Last Date of Application Form : Notified Soon
FAQs

Ongc Assistant Executive Engineer 2026 Exam Syllabus Frequently Asked Questions (FAQ's)

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