RRB JE Mechanical 2024 Batch | Online Live Classes by Adda 247

Subject

Syllabus

No of Hours

• Resolution of forces, Equilibrium and Equilibrant, parallelogram law of forces, triangle law of forces,
• Polygon law of forces and Lami’s theorem, couple and moment of a couple, condition for equilibrium of rigid body subjected to number of coplanar non-concurrent forces,
• Definition of static friction, dynamic friction, derivation of limiting angle of friction and angle of repose, resolution of forces considering friction when a body moves on horizontal plane and inclined plane,
• Calculation of moment of inertia and radius of gyration of: (a) I-Section (b) channel section (c) T-Section (d) L-Section (Equal & unequal lengths) (e) Z-Section (f) Built up sections (simple cases only),
• Newton’s laws of motion (without derivation), motion of projectile, D’Alembert’s principle, definition law of conservation of energy, law of conservation of momentum.

10

Material Science

• Mechanical properties of engineering materials – tensile strength, compressive strength, ductility, malleability, hardness, toughness, brittleness, impact strength, fatigue, creep resistance.
• Classification of steels, mild steel and alloy steels. Importance of heat treatment.
• Heat treatment processes – annealing, normalizing, hardening, tempering, carburising, nitriding and cyaniding.

10

Strength of Materials

• Stress, strain, stress strain diagram, factor of safety, thermal stresses, strain energy, proof resilience and modulus of resilience.
• Shear force and bending moment diagram – cantilever beam, simply supported beam, continuous beam, fixed beam.
• Torsion in shafts and springs, thin cylinder shells.

10

Machining

• Working principle of lathe. Types of lathes – Engine lathe – construction details and specifications.
• Nomenclature of single point cutting tool, geometry, tool signature, functions of tool angles.
• General and special operations – (Turning, facing, taper turning thread cutting, knurling, forming, drilling, boring, reaming, key way cutting),
• Cutting fluids, coolants and lubricants. Introduction to shaper, slotter, plainer, broaching, milling and manufacture of gears, heat treatment process applied to gears.

12

Welding

• Introduction, classification of welding processes, advantages and limitations of welding, principles of arc welding, arc welding equipment,
• Choice of electrodes for different metals, principle of gas (oxy-acetylene) welding, equipment of gas welding, welding procedures (arc & gas), soldering and brazing techniques,
• Types and applications of solders and fluxes, various flame cutting processes, advantages and limitations of flame cutting, defects in welding,
• Testing and inspection modern welding methods, (submerged, CO2, atomic – hydrogen, ultrasonic welding), brief description of MIG & TIG welding.

12

Grinding & Finishing Process

• Principles of metal removal by grinding, abrasives, natural and artificial, bonds and binding processes, vitrified, silicate, shellac rubber, grinding machines,
• Classification: cylindrical, surface, tool & cutter grinding machine, construction details, relative merits,
• Principles of centreless grinding, advantages & limitations of centreless grinding work, holding devices, wheel maintenance, balancing of wheels, coolants used,
• Finishing by grinding, honing, lapping, super finishing, electroplating, basic principles – plating metals, applications,
• Hot dipping, galvanizing tin coating, Parkerising, anodizing, metal spraying, wire process, powder process and applications,
• Organic coatings, oil base paint, lacquer base enamels, bituminous paints, rubber base coating.

12

Metrology

• Linear measurement – Slip gauges and dial indicators, angle measurements, bevel protractor, sine bar, angle slip gauges,
• Comparators (a) mechanical (b) electrical (c) optical (d) pneumatic.
• Measurement of surface roughness; methods of measurements by comparison, tracer instruments and by interferometry, collimators, measuring microscope, interferometer,
• Inspection of machine parts using the concepts of shadow projection and profile projection.

12

Fluid Mechanics & Hydraulic Machinery

• Properties of fluid, density, specific weight, specific gravity, viscosity, surface tension, compressibility capillarity,
• Pascal’s law, measurement of pressures, concept of buoyancy. Concept of Reynold’s number, pressure, potential and kinetic energy of liquids,
• Total energy, laws of conservation, mass, energy and momentum, velocity of liquids and discharge,
• Bernoulli’s equation and assumptions, venturi meters, pitot-tube, current meters.
• Working principle & constructional details of centrifugal pump, efficiencies – manometric efficiency, volumetric efficiency, mechanical efficiency and overall efficiency,
• Cavitation and its effect, working principle of jet & submersible pumps with line diagrams.

12

Industrial Management

• Job analysis, motivation, different theories, satisfaction, performance reward systems,
• Production, planning and control, relation with other departments,
• routing, scheduling, dispatching,
• PERT and CPM, simple problems. Materials in industry, inventory control model, ABC Analysis,
• Safety stock, re-order, level, economic ordering quantity, break even analysis,
• Stores layout, stores equipment, stores records, purchasing procedures, purchase records,
• Bin card, Cardex, Material handling, Manual lifting,
• hoist, cranes, conveyors, trucks, fork trucks.

16

Thermal Engineering

• Laws of thermodynamics, conversion of heat into work and vice versa, laws of perfect gas.
• Thermo dynamic processes – isochoric, isobaric, isothermal hyperbolic, isentropic, polytropic and throttling,
• Modes of heat transfer, thermal conductivity, convective heat transfer coefficient,
• Stefan Boltzmann law by radiation and overall heat transfer coefficient.
• Air standards cycles – Carnot cycle, Otto cycle, Diesel cycle,
• Construction and working of internal combustion engines, comparison of diesel engine and petrol engine.
• Systems of the internal combustion engine, performance of internal combustion engines
• Air compressors, refrigeration cycles, and the principle of a refrigeration plant.
   

16