Odisha Civil Services Examination
OPSC Optional Paper - Mechanical Engineering
Paper-I
Kinematic chain. Mechanisms and inversions. Motor Vehicle steering gears.
Hookes’ Joint. Toothed gears. Tooth profiles. Interference. Gear Trains.
Compound gears. Differential. Cam profiles. Displacement, velocity and acceleration of cam followers. Flywheel and Turning moment diagram.
Governors, Stability, Sensitivity, Isochronism and hunting. Governor effort and power. Controlling force and effect of friction. Balancing of revolving masses.
Balancing of single and multicylinder engines. Friction and lubrication.
Hydrodynamic theory of lubrication. Linear free and forced vibration of single and two degree freedom mechanical systems with or without damping. Critical speeds and whirling of shafts. Vibration of beams. Torsional vibration.
Stress and strain for materials in tension, compression and shear. Relation between elastic constants for an isotropic, linear elastic and homogeneous materials. Unilaxial Loading. Thermal stresses Stress-strain diagrams for ductile and brittle materials. Stress and strain in two dimensions, Principal planes, Mohr’s circle, Strain rosette. Bending moment and shear force diagrams. Composite beams. Bending stresses. Shear stress distribution. Slope and deflection in beams.
Torsion of circular shafts. Helical springs. Combined stresses. Theories of failure.
Thick and thin walled pressure vessels. Rotating discs and shrunk fit. Struts and columns. Energy principles. Strain energy due to bending, twisting and axial load. Castigliano’s theorem. Reciprocal Theorem. Slope and deflection by energy methods.
Basic concepts on structure of solids, Crystalline materials, Defects in crystalline materials, Alloys and binary phase diagrams, structure and properties of common engineering materials. Iron-carbon equilibrium diagram TTT-diagram. Heat treatment of steels. Plastics, Ceramics and composite Materials, common applications of various materials.
Pattern, Gating and risering system, casting defects, special casting process, welding :- Gas welding, arc welding, resistance welding, thermit welding, Tool geometry and nomenclature ASA, ORS and NRS, types of chips, cutting variable,
Chip reduction coefficient, Merchant’s force diagram, velocity relationship and Kronenberg’s relationship. Ernest & Merchant angle relationship, Lee-shafer relationship-cutting fluid, Tool wear, Taylor’s tool life equation, Economics of metal machining, Jigs and fixtures.
NC, CNC, ECM, EDM, AJM, USM; LBM, Plasma machining, High energy rate forming.
Production Planning and Control, Forecasting-Moving average, exponential smoothing, Operations sheduling; assembly line balancing. Product development.
Breakeven analysis, Capacity planning. PERT and CPM.
Control Operations : Inventory control-ABC analysis. EOQ model. Materials requirement planning. Job design, Job standards, work measurement, Quality management-Quality control. Operations Research : Linear programmingGraphical and Simplex methods. Transportation and assignment models. Single server queuing model.
Value Engineering : Value analysis, for cost/value. Total quality management and forecasting techniques. Project management.
Computer Organisation, Flow charting. Features of Common Computer
Languages-C, FORTRAN, Elements of d Base and elementary programming.
Paper-II
Basic concept. Open and closed systems, Applications of Thermodynamic Laws, (Zeroth, First and Second Laws), Gas equations, Clapeyron equation, Availability,
Irreversibility and Tds relations, reciprocating air compressors.
Spark ignition and compression ignition engines, Four stroke engines and Two stroke engines, mechanical, thermal and volumetric efficiency, Heat balance.
Combustion process in S.I. and C.I. engines, preignition detonation in S.I. engine, Diesel knock in C.I. engine, Choice of engine fuels, Octane and Cetane ratings. Alternate fuels, Carburetion and Fuel injection, Engine emissions and control.
Solid, liquid and gaseous fuels, stoichometric air requirements and excess air factor, fuel gas analysis, higher and lower calorific values and their measurements.
One and two dimensional heat conduction, Heat transfer from extended surfaces, heat transfer by forced and free convection. Heat exchangers. Fundamentals of diffusive and convective mass transfer, Radiation laws, heat exchange between black and non black surfaces, Network Analysis. Heat pump, refrigeration cycles(Air refrigeration, vapour compression and absorption refrigeration) and systems, Condensers, evaporators and expansion devices and controls. Properties and choice of refrigerant, Refrigeration Systems and components, psychometrics, comfort indices, cooling load calculations, solar refrigeration.
Continuity, Momentum and Energy Equations. Adiabatic and Isentropic flow, fanno lines, Rayleigh lines. Theory and design of axial flow turbines and compressors, Flow through turbo-machine balde, cascades, centrifugal compressor. Dimensional analysis and modelling. Selection of site for steam, hydro, nuclear and stand-by power plants, Selection base and peak load power plants, Modern High pressure, High duty boilers, Draft and dust removal equipment, Fuel and cooling water systems, heat balance, station and plant heat rates, operation and maintenance of various power plants, preventive maintenance, economics of power generation
