Mechanical Exam

IES, i.e. Indian Engineering Service, is the dream of every engineer in India. IES officers are selected by the union government on the recommendations made by the Union Public Service Commission (UPSC). IES officers comprise of engineers who work under the government of India and designated as Class – 1 officer. They administer a large segment of the public sector economy, which constitutes of Indian Railways, Power, Telecommunications, Central Water engineering, Defense service of Engineers, Central Engineering Service, etc. The nature of work performed by these bureaucrats largely depends on their engineering branch and the service or cadre they are recruited in. The career progression goes smoothly attaining high esteem. The first position offered is that of Asst. Executive engineer and the hierarchy ends at the position of Chairman/ Managing Director.

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A combined four-stage competitive examination (comprising six tests), called the Engineering Services Examination (ESE) is conducted by the UPSC for recruitment to the Indian Engineering Services. ESE is considered as the toughest exam in India and amongst the toughest in the world due to less number of posts and its technical nature.

The recruited candidates will be eligible for following categories -

1. Civil Engineering

Indian Railway Service of Engineers
Indian Railway Stores Service
Central Engineering Service
Military Engineer Service (Building and Roads Cadre)
Central Water Engineering
Assistant Executive Engineer
Survey of India Service

2. Electrical Engineering

Indian Railway Service of Electrical Engineers
Indian Railway Stores Service
Central Electrical & Mechanical Engineering Service
Indian Naval Armament Service
Military Engineer Service
Assistant Executive Engineer (in Ministry of Defence)
Assistant Naval Store (in Indian Navy)

3. Mechanical Engineering

Indian Railway Service of Mechanical Engineers
Indian Railway Stores Service
Central Water Engineering Service
Indian Ordnance Factories Service
Indian Naval Armament Service
Assistant Executive Engineer (in Ministry of Defence)
Assistant Naval Store officer Grade I in Indian Navy
Central Electrical & Mechanical Engineering Service
Assistant Executive Engineer (in Boarder Roads Engineering Service)
Mechanical Engineer (in Geological Survey of India)

4. Electronics and Telecommunication Engineering

Indian Railway Service of Signal Engineers
Indian Railway Stores Service
Indian Ordnance Factories Service
Indian Naval Armament Service
Assistant Executive Engineer (in Ministry of Defence)
Engineer in Wireless Planning and Coordination Wing/Monitoring Organisation
Assistant Naval Stores officer (in Indian Navy)
Survey of India Service


A) Nationality:

The candidates applying for IES 2016 must either be an Indian Citizen or a subject of Nepal or Bhutan.
A Tibetan refugee who made India is his/her permanent base before January 1st, 1962.
A person or candidate of Indian origin migrated from Pakistan, Sri Lanka, Burma or East African countries of Kenya, Uganda, United Republic of Tanzania, Zambia, Vietnam, Ethiopia etc also fall under the IES 2016 Eligibility Criteria.
The candidate mentioned in 2nd, 3rd and with subject to Nepal and Bhutan have to produce a certificate of eligibility issued by the Government Of India till the certificate is not produced there admission will be on temporary basis.

B) Age Limit:

The minimum age attained by the candidate is 21 years and the candidate must not be more than 30 years.
The candidate must fall in the age bracket of 21 to 30 years on 1st August of the year of examination.
The upper age limit is 30 but is relaxed in case of Government servants and has been increased to 35 years but the candidate has to be an employee of any department or office under any authority like Railway Department, Central Public Works Department, Military Engineer Service department etc in order to fall in the eligibility criteria of IES 2015.

C) Educational Requirement or Qualification:

A candidate must have an Engineering degree from a University incorporated by an Act of the Central Government or State Legislature in India.
The candidate must have passed section A & B of the institutes or University examination.
The candidate must have passed a Graduate Membership examination of the institute of electronic and Telecommunication of India OR Obtained a degree/ diploma in Engineering from such foreign institute/ university and under such condition as may be recognizable in the eye of Government for the purpose from time to time OR passed Associate Membership examination part II and III/ Sections A and B of the Aeronautical society of India OR passed graduate Membership examination of the Institution of Electronics and Radio Engineers, London held after November, 1959 are required to be in the eligibility criteria of IES 2015.

D) Physical Standards:

The candidates applying must be physically and mentally fit as per the physical standards laid by UPSC with regard to the IES 2015 Eligibility Criteria


Candidates have to apply online at website:-


The fee amount for the General/OBC candidates is Rs.200 and SC, ST, PH and female candidates are exempted from the fee payment. Candidates can make payment through online mode or offline mode.

Online Payment Mode: Candidates can pay the application fee through Credit Card, Debit Card and Internet Banking.
Offline Payment Mode: Candidates can pay the application fee through E-Challan which would be paid through any branch of SBI.







ESE 2016 Exam Pattern

ESE is a four-stage competitive examination (comprising six tests). The entire examination is divided into two parts:

Written Examination - 1000 Marks

Interview - 200 Marks

Total - 1200 Marks

There are objective as well as conventional (descriptive) papers. One paper (Paper I) for GA (General Ability) is part of the assessment system apart from the engineering subject of the candidate. The entire technical subject is divided into four papers (Papers II, III, IV & V). There is a penalty (negative marking) for wrong answers marked by the candidate in the objective type papers. There is a three-day schedule of the written examination, comprising all five written examinations.

Scheme of Examination

Paper I (Objective type)

General Ability Test (Part A: General English) (Part B: General Studies)

200 Marks

Papers II & III (Objective type)

Civil Engineering / Mechanical Engineering / Electrical Engineering / Electronics & Telecommunication Engineering

200 Marks for each paper

Papers IV & V (Conventional type)

Civil Engineering / Mechanical Engineering / Electrical Engineering / Electronics & Telecommunication Engineering

200 Marks for each paper

Total marks for written examination

1000 Marks


Personality Test

200 Marks

First stage

The first day is allocated for the General Ability (GA) paper. This exam is of 2 hours duration. On the first day there is just one exam. This exam consists of General English and General Studies. Paper is maximum of 200 marks.

Second stage

The second day is allocated for the Objective Technical Papers (II & III). There is one objective exam for each paper separately and each being of 2 hours in duration. Each paper is maximum of 200 marks.

Third stage

The third day is allocated for the Conventional Technical Papers (IV & V). There is one subjective exam for each paper separately and each being of 3 hours in duration. Each Paper is maximum of 200 marks.

The conventional answer sheets of a candidate are evaluated only when he / she qualifies the objective examination.

Interview (Fourth Stage)

This is the fourth and final stage; candidates who qualify the written exam are called for the interview. Interview carries 200 marks. Officially called "Personality Test", the object of the interview is to assess the personal suitability of the candidate for a career in public service by a Board of competent and unbiased observers. The test is intended to judge the mental calibre of a candidate. In broad terms this is really an assessment of not only his intellectual qualities but also social traits and his interest in current affairs. Some of the qualities to be judged are mental alertness, critical powers of assimilation, clear and logical exposition, balance of judgement, variety and depth of interest, ability for social cohesion and leadership, intellectual and moral integrity.

The technique of the interview is not that of a strict cross-examination but of a natural, though directed and purposive conversation which is intended to reveal the mental qualities of the candidate.

The interview test is not intended to be a test either of the specialized or general knowledge of the candidates which has been already tested through their written papers. Candidates are expected to have taken an intelligent interest not only in their special subjects of academic study but also in the events which are happening around them both within and outside their own state or country as well as in modern currents of thought and in new discoveries which should rouse the curiosity of well-educated youth.

These four stages ensure that the candidates selected, are best suited to handle the responsibilities which will be entrusted to them. The selected candidates then undergo training at the academies / institutes of their respective cadres that makes them acquainted with the area of work, the cadre / service is engaged in.


Mechanical Engineering Syllabus

(For both objective and conventional type papers)


Objective: - 120 Questions

Subjective: - 5 Questions





Cycles and IC Engines, Basic concept, open and closed systems. Heat and work, Zeroth, First and second law, Application to non flow and flow processes. Entropy, Availability, Irreversibility and Tds relations clapeyron and real gas equations, Properties of ideal gases and vapors. Standard vapor, Gas power and refrigeration cycles. Two stage compressor. C. I. and S. I. Engines. Pre-ignition, Detonation and diesel-knock, Fuel injection and carburetion, supercharging turbo-prop and Rocket engines, engine cooling, Emission & control, Fuel gas analysis, Measurement of calorific values. Conventional and Nuclear power production


Heat Transfer and Refrigeration & Air Conditioning

Modes of heat transfer. One dimensional steady an unsteady condition. Composite slab and equivalent Resistance. Heat dissipation from extended surfaces. Heat exchangers. Overall heat transfer coefficient. Empirical correlations for heat transfer and in laminar turbulent flows and for free and forced convection. Thermal boundary layer over a flat plate. Fundamentals of diffusive and convective mass transfer, Block, body and basics concepts in radiation. Enclosure theory, shape factor, Net work analysis, heat pump and refrigeration cycles and systems. Refrigerants. Condensers. Evaporators and expansion devices. Psychrometry, charts and application to air conditioning. Sensible melting and cooling. Effective temperature, comfort indices, load calculations, solar refrigeration, controls, Duct design


Fluid Mechanics

Properties and classification of fluids, Manometry, Forces on immersed surfaces, Center of pressure, Buoyancy, elements of stability of floating bodies. Kinematics and Dynamics, irrotational and incompressible. Inviscid flow, Velocity potential. Pressure field and forces on immersed bodies Bernoulli’s equations. Fully developed flow through pipes pressure drop calculations. Measurement of flow rate and pressure drop. Elements of boundary layer theory. Integral approach. Laminar and turbulent flows. Separations, flow over weirs and notches, Open channel flows, Hydraulic jump. Dimensionless numbers Dimensional analysis, Similitude and modelling. One dimensional isentronic flow, normal shock wave. Flow through convergent—divergent ducts, oblique shock-wave, Ravleigh and fanno lines.


Fluid Machinery and Stream Generators

Performance, operation control of hydraulic pump and impulse and reaction Turbines. Specific speed Classification. Energy transfer. Coupling power, transmission, steam generators, Fire-tube and water tube hoilers, Flow of steam through nozzles and diffusers, Wetness and condensation various types of steam and gas turbines velocity diagram. Partial addition Reciprocating, Centrifugal and axial flow compressors, Multistage compressors, role of Mach number, Reheat, Regeneration, Efficiency, Governace.




Theory of Machines.

Kinematic and dynamic analysis of planner mechanisms, Cams. Gear trains. Flywheels, Governors, Balancing of rigid rotor and field balancing. Balancing of single and multicylinder engines. Linear vibration analysis of mechanical systems. Critical speeds and whirling of shafts. Automatic controls.


Machine Design

Design of joints: cotters, key, spines, welded joints, threaded fasteners, joints formed by interference fits.

Design of friction drives: couplings and clutches, belt and chain drives, power screws.

Design of power transmission system: gears and gears drives, shaft and axle, wire ropes.

Design of brings Hydrodynamic bearings and rolling element bearings.


Strength of Materials.

Stress and strains in two dimensions, principal stresses and strains, Mohr’s construction, linear elastic materials, isotropy and anisotropy, stress-strains relations, uniaxial loading. Thermal stresses, Beams: Bending moment and shear stress distribution. Torsion of shafts, helical springs. Combined stresses, thick and thin walled pressure vessels. Struts and columns. Strains energy concepts and theories of failure.


Engineering Materials

Basics concepts on structure of solids, crystalline materials, Defects in crystalline materials, Alloys and binary phase diagrams, structure and properties of common engineering materials. Heat treatment of steels. Plastics, ceramics and composite materials. Common applications of various materials.


Production Engineering

Metal Forming: basic principles of forming, drawing and extraction; high energy rate forming; powder metallurgy.

Metal Casting: Die casting, investment casting, Shell moulding, Centrifugal casting, Gating & rising design; melting furnaces.

Fabrication processes: Principles of gas, Arc, Shielded are welding; advanced welding processes; weldability; Metallurgy of welding.

Metal cutting: Turning, methods of screw production. Drilling, Boring, Milling, Gear manufacturing, production of flat surfaces, Grinding & Finishing processes. Computer controlled Manufacturing systems—CNC, DNC, FMS, Automation and Robotics. Cutting Tool Materials, Tool Geometry Mechanism of Tool wear, Tool life & Machinability; Measurement of cutting forces. Economics of machining unconventional machining processes, Jigs and Fixtures, Fits and tolerance Measurement of surface texture comparators, Alignment tests and reconditioning of machine Tools.


Industrial Engineering

Production, Planning and control: Forecasting—moving average exponential smoothing, operation scheduling; assembly line balancing product development. Break even analysis, capacity planning, PERT and CPM.

Control operations; Inventory control ABC analysis EOO model. Materials requirement planning. Job design, Job Quality, work measurement, Quality measurement—Quality analysis and control.

Operations Research: Linear programming –Graphical and Simplex methods, Transportation and assignment models, Single server queuing model.

Value Engineering: Value analysis for cost/value.

Elements of Computation

Computer organization, Flow charting, Features of common computer languages—FORTRAN, d’ Base III. Lotus 1-2-3, C and elementary programming.

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ESE 2016/ IES 2016 Preparation

ESE written exam consists of both objective and conventional type questions hence theory, conceptual knowledge and problem solving techniques are equally important.
Good writing skills, excellent presentation, subjective theory, explanations, derivations, diagrams and equations will fetch you good marks in conventional or subjective paper.
Be aware of exam pattern like how many technical & non-technical questions are asked, negative marks, weightage, exam duration and marks per question. Always make a habit of referring previous year question papers.
Prefer Reference books for derivations, equations, conceptual thinking, theory etc.
Short Cut Techniques

Use short techniques for numerical solving instead of traditional approach.

Reading news paper, watching morning bulletin, surfing websites will help the candidates to prepare and score better in the General ability paper carrying 200 marks.
Do not neglect General Ability part as this section is scoring and also plays an important role in personal interview.
Practice previous year question papers and analyze the weak topics and concentrate more on those topics. Always try to solve the papers in given time to obtain an idea that how many questions you are able to solve in given time limits.
Intense knowledge of the subjects, strong basics, and clear concepts helps in better understanding of the subjects and prove to be instrumental in getting good scores.
Personal Interview

Sound technical knowledge, Positive attitude, Body language, Good communication skills, knowledge about current affairs plays an important role to clear personal interviews. Candidates should be prepared for the questions about their strengths and weaknesses.

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