Important Topics to Prepare for SSC JE Mechanical Engineering

SSC JE exam is a major exam and it is conducted annually to recruit suitable engineers..

In this session, we will look into some of the important topics for SSC JE Mechanical Engineering.

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SSC JE Mechanical Engineering: Important Topics:

      I.        Theory of Machine and Machine design comprising 15 questions

                    a.        Machine Theory : 8

                    b.        Machine Design : 7

    II.        Strength of material and Engineering Mechanics comprising 15 questions

   III.        Thermal Engineering comprising 30 questions

                    a.        Basic Thermodynamics : 11

                    b.        IC Engines : 13

                    c.        Boilers : 2

                    d.        Steam Turbines/ Refrigeration : 4

  IV.        Production Engineering comprising 10 questions

                    a.        Welding : 3

                    b.        Casting : 2

                    c.        Molding : 1

                    d.        Material Science : 4

   V.        Fluid Mechanics & Machinery comprising 30 questions

                    a.        Properties & Types of Fluid : 5

                    b.        Fluid statics : 2

                    c.        Kinematics of Fluid : 9

                    d.        Fluid Dynamics : 5

                    e.        Fluid pressure measurement and flow rate : 5

                     f.        Hydraulic Turbine and Centrifugal pumps : 4

Let’s look into these topics in detail.

·         Theory of Machines & Machine Design:

This topic covers the concepts of a simple machine, four bar connection and movement of the link; Flywheels and energy fluctuations, transmission of power via belts such as V-belts and Flat belts; clutches comprising plate and conical clutch; Gear types like Gear profile and Gear ratio calculation, Governors comprising Principles and classification; welded joint; Cams, Bearings, Friction in collars and axis.

·         Strength of Materials and Engineering Mechanics:

The subtopics included are: Equilibrium of forces; Law of motion, Friction, Stress and strain concepts; Elastic limit and constants; bending moments; cutoff force diagram; Stress in composite bars; twisting of circular shafts; Bucking of columns based on theories of Euler and Rankin; thin walled pressure vessels.

·         Thermal Engineering:

Pure Substances Properties:

P-V and P-T diagrams of substances such as H2O, Steam table concept based on 
steam generation process; Saturation; wet and superheated status; Dryness fraction 
of steam; Superheat degree of steam; H-s form of Steam chart or the Mollier’s Chart.

1^st Law of Thermodynamics:

The topic comprises Stored and internal energy definitions; first law of 
Thermodynamics on Cyclic Process; Equation of Non-flow energy; Energy Flow and 
Enthalpy terminology; Steady State and Steady Flow conditions and The Equation for Steady State and Steady Flow.

2^nd Law of Thermodynamics:

Sink definition; Source Reservoir of Heat; Heat Engine; Heat Pump and Refrigerator; 
Thermal efficiency of heat engines & co-efficient of performance of Refrigerators; 
Statements of 2^nd Law of Thermodynamics by Kelvin-Planck and Clausius; Absolute or 
Thermodynamic scale of temperature; Clausius Integral; Entropy change calculation of 
ideal gas processes. Carnot Cycle & Carnot Efficiency; PMM-2; definition and its 
impossibility.

Air standard cycles for IC Engines:

Otto cycle; cycle plot on P-V, T-S and h-s planes; Thermal efficiency; Diesel Cycle; 
Plot on P-V, T-S planes; IC Engine Performance; IC Engine Combustion; IC Engine 
Cooling and Lubrication.

Rankine Cycle of Steam:

Rankine cycle plot on P-V, T-S and h-s planes; Rankine Cycle efficiency, with and 

without pump work. Boilers; Classification; Specification; Fittings & Accessories 
comprising fire tube and water tube boilers; Air Compressors and the cycles; 
Refrigeration cycles; Refrigeration Plant Principle; Nozzles and Steam Turbines.

·         Fluid Mechanics & Machinery:

Properties & Classification of Fluid:

Fluids- Ideal and Real; Newton’s Law of Viscosity; Newtonian and Non-Newtonian 
fluids; Compressible and Incompressible fluids. Fluid statics comprising Pressure at a 
point; Fluid pressure measurement including Manometers, U-tube, Inclined tube. Fluid 
Kinematics including Stream line, Laminar and Turbulent flow, Internal and External 
flow, Continuity equation. Dynamics of ideal fluids including Bernoulli’s equation; Total 
Head, Velocity head; Pressure Head; Application of Bernoulli’s equation; 
Measurement of flow rate Basic Principles; Venturimeter, Pilot Tube, Orifice meter; 
Hydraulic Turbines including Classifications, Principles; Centrifugal Pumps comprising 
Classifications, Principles, Performance.

Production Engineering:

Classification of Steels:

This subtopic includes Mild Steel & Alloy Steel, Heat Treatment of steel; Welding 
comprising Arc Welding, Gas Welding, Resistance Welding, Special Welding 
Techniques or TIG, MIG etc.; (Brazing & Soldering), Welding Defects & Testing; 
NDT, Founding & Casting including techniques, defects, processes in casting, 
Forging, Extrusion etc., Metal cutting principles, cutting tools, Basic Principles of 
Machining with Lathe, Milling, Drilling, Shaping, Grinding, Machines, Tools and 
processes of manufacturing.

Overview:

This article has included the important topics to prepare for SSC JE Mechanical  Engineering. Hope this session has been helpful to the JE aspirants. Make sure you  cover every topic. Set an effective preparation strategy and manage the time for each  section. It is recommended that you refer the syllabus for getting a clear idea on the important topics for SSC JE. 

Practicing online SSC JE Mechanical mock test will surely get you a high score. So get the gears on… Start preparing from this very moment!!!

ALL THE BEST!!!