Uttar Pradesh Public Service Commission

Uttar Pradesh Public Service Commission

Combined State Engineering Service Special Recruitment Examination - 2007 and Combined State Engineering Service General Recruitment Examination – 2007

Mechanical Engineering

Paper-I

Note: Answer any five questions, atteast two from each part.

PART-A

(a) Statics Equilibrium: Suspension cables, Friction, Trusses. Principle of Virtual work.

(b) Dynamics: Kinematics of rigid bodies- plane motion, absolute motion, relative motion. Kinetics of rigid bodies- plane motion, force, mass and acceleration, work and energy, impulse and momentum.

(c) Theory of Machines: Velocity and acceleration of links, Cams Gears and gear trains, clutches. Belt drives, brakes and dynamomotors. Flywheel and governors. Balancing rotating and recipcating masses and multicylinder engines. Free, forced and ped vibrations. Critical speed whirling of shafts.

(d) Mechanics of Solids: Stress and strain in two dimensions. Mohr's circle. Strain rosettes Torsion of circular shafts. Stresses and deflections due to bending of beams. Unsymmetrical bending. Curved beams. Castigliano's theorem. Thick cylinders, shrink fit. Stability of columns. Theories of failures.

PART-B

(a) Material Science: Atomic structure, Crystal systems, Imperfections, polymers, elastomers, and ceramics. Mechanical behaviour of Materials, Elastics and inelastic action, linear and non-linear elastic properties. True and conventional stress strain curves for common engineering materials. Strain hardening, Ductile and brittle transition, Fractue. Greep and Fatigue. Semi-conductors super-conductors and ferrites. Magnetic and dielectric properties.

(b) Manufacturing Science: Merchant's theory, Taylor equation. Machinability. Unconventional machining methods including EDM, ECM and ultrasonic machining. Analysis of forming processes. High velocity forming Explosive forming. Surface roughness, gauging comparators. Jigs and fixtures.

(c) Production Management: Work simplification, work sampling, value engineering Line balancing, work station design, storage space requirement. ABC analysis. Economic order, quantity including finite production rate, Graphical and simplex methods for linear programming, transportation model, elementary queucing theory.. Quality Control and its uses in product design. Use of X, R, F, (sigma) and G Charts. Single sampling plans, operating characteristic curves Average size.

PAPER-II

Note: Answer any five questions atleast two from each part.

PART-A

(a) Thermodynamics: Applications of the first and second laws of thermodynamics Detailed analysis of thermodynamic cycles.

(b) Fluid Mechanics: Reynolds transport theorem and its applications. Ideal fluid flow. Velocity distribution and resistance laws for laminar and turbulent flow in pipes. Dimensional analysis and similitude. Forces on immersed bodies and boundary layer over a flat plate. Isentropic flow and adiabatic flow normal and oblique shock waves.

(c) Heat Transfer: Critical thickness of Isolation- Conduction in the presence of Heat sources and sinks, Heat transfer from fins One dimensional unsteady conduction. Time constant for thermocouples. Momentum and energy equations for boundary layers on a flat plate. Dimensionless numbers, Free and forced convection. Nature of radient heat. Stefan- Boitzamann law. Configuration factor. Natural and forced convection. IMTD heat exchanger effectiveness and number of transfer units.

PART-B

(a) Energy Conversion: Combustion phenomenon in S.I. and C.I engines. Carburetion and fuel injection. Classification of hydraulic turbines, specific speed, Selection of turbines, Micrchydropcwer station and equipment, Centrifugal pump, Performance for compressor. Analysis of steam and gas turbines, High pressure bailers Unconventional power systems including Nuclear power and MHD systems utilisation of solar energy. (b) Environments: Control: Vapour compression absorption, steam jet and air refrigeration systems. Properties of important refregerants. Psychometric properties, psychometric relations. Use of psychrometric chart. Estimation of cooling load supply air conditions, sensible heat factor, system layout.