JSSC JE MECHANICAL
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-belt and Flat belts, Clutches- Plate and Conical clutch, Gears- Types 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 vessels.
- Thermal Engineering- 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 and super heated status, Definition of dryness fraction of steam, degree of superheat of steam. h-s chart of steam(Mollier’s Chart).
- 1ST Law Thermodynamics: Definition of stored energy and internal energy, 1st. law of Thermodynamics of cyclic process, Non Flow Energy Equation, Flow Energy & Definition of Enthalpy, Condition for Steady State, Steady Flow; Steady State Steady Flow Energy Equation.
- 2nd Law of Thermodynamics:- Definition of Sink, Source Reservoir of Heat, Heat Engine, Heat pump and Refrigerator, Thermal efficiency of heat engines and co- efficient of performance of Refrigerators. Kelvin -Plank & Clausius Statement of 2nd. Law of Thermodynamics. Absolute or Thermodynamic Scale of Temperature, Clausius Integral, Entropy, Entropy change calculation of ideal gas processes. Carnot Cycle & Carnot Efficiency, PMM-2; definition and it’s impossibility.
- Air Standard Cycles for IC Engine:– 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.
- Rankin cycle of steam:- Simple Rankine Cycle plot on P-V, T-S, h-s planes, Rankine cycle efficiency with and without pump work.
- Boilers; Classification; Specification; Fitting & Accessories: Fire tubes and water tubes boilers.
- Air Compressors & their cycles; Refrigeration cycles; Principle of Refrigeration Plant; Nozzles & Steam Turbines.
- Fluid Mechanics and Machinery.
- Properties and Classification of Fluid: 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 tubes, inclined tube.
- Fluid Kinematics: Stream line, laminar and turbulent flow, external and internal flow, continuity equation.
- Dynamics of ideal fluids:- 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:- Classifications, Principles.
- Centrifugal Pumps:- Classification, Principle, Performance.
- Production Engineering:
- Classification of Steels: mild steel and 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 and 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.
