Staff Selection Commission
SSC: Junior Engineer (Civil &
(For both Objective and Conventional Type Papers)
Subject : Mechanical Engineering
Theory of Machines and Machine Design
Concept of simple machine, Four bar linkage and link motion,
Flywheels and fluctuation of energy, Power transmission by belts – V-belts and
Flat belts, Clutches – Plate and Conical clutch, Gears – Type of gears, gear
profile and gear ratio calculation, Governors – Principles and classification,
Riveted joint, Cams, Bearings, Friction in collars and pivots.
Engineering Mechanics and Strength of Materials
Equilibrium of Forces, Law of motion, Friction, Concepts of
stress and strain, Elastic limit and elastic constants, Bending moments and
shear force diagram, Stress in composite bars, Torsion of circular shafts,
Buckling of columns – Euler’s and Rankin’s theories, Thin walled pressure
Properties of Pure Substances :
p-v & P-T diagrams of pure substance like H2O, Introduction of steam table with
respect to steam generation process; definition of saturation, wet & superheated
status. Definition of dryness fraction of steam, degree of superheat of steam.
h-s chart of steam (Mollier’s Chart).
1st Law of Thermodynamics :
Definition of stored energy & internal energy, 1st Law of Thermodynamics for
cyclic process, Non Flow Energy Equation, Flow Energy & Definition of Enthalpy,
Conditions for Steady State Steady Flow; Steady State Steady Flow Energy
2nd Law of Thermodynamics :
Definition of Sink, Source Reservoir of Heat, Heat Engine, Heat Pump &
Refrigerator; Thermal Efficiency of Heat Engines & co-efficient of performance
of Refrigerators, Kelvin – Planck & Clausius Statements of 2nd Law of
Thermodynamics, Absolute or Thermodynamic Scale of temperature, Clausius
Integral, Entropy, Entropy change calculation for ideal gas processes. Carnot
Cycle & Carnot Efficiency, PMM-2; definition & its impossibility.
Air standard Cycles for IC engines :
Otto cycle; plot on P-V, T-S Planes; Thermal Efficiency, Diesel
Cycle; Plot on P-V, T-S planes; Thermal efficiency.
IC Engine Performance, IC Engine Combustion, IC Engine
Cooling & Lubrication.
Rankine cycle of steam :
Simple Rankine cycle plot on P-V, T-S, h-s planes, Rankine cycle efficiency with
& without pump work.
Specification; Fittings & Accessories : Fire Tube & Water Tube Boilers.
Air Compressors & their cycles;
Refrigeration cycles; Principle of a Refrigeration Plant; Nozzles & Steam
Fluid Mechanics & Machinery
Properties & Classification of
Fluids : ideal & real fluids, Newton’s law of viscosity, Newtonian
and Non-Newtonian fluids, compressible and incompressible fluids.
Fluid Statics : Pressure
at a point.
Measurement of Fluid Pressure :
Manometers, U-tube, Inclined tube.
Fluid Kinematics : Stream
line, laminar & turbulent flow, external & internal flow, continuity equation.
Dynamics of ideal fluids
: Bernoulli’s equation, Total head; Velocity head; Pressure head; Application of
Measurement of Flow rate Basic
Principles : Venturimeter, Pilot tube, Orifice meter.
Centrifugal Pumps :
Classifications, Principles, Performance.
Classification of Steels : mild steal & alloy steel, Heat
treatment of steel, Welding – Arc Welding, Gas Welding, Resistance Welding,
Special Welding Techniques i.e. TIG, MIG, etc. (Brazing & Soldering), Welding
Defects & Testing; NDT, Foundry & Casting – methods, defects, different casting
processes, Forging, Extrusion, etc, Metal cutting principles, cutting tools,
Basic Principles of machining with (i) Lathe (ii) Milling (iii) Drilling (iv)
Shaping (v) Grinding, Machines, tools & manufacturing processes.