MECHANICAL ENGINEERING

Thermodynamics : 

 Definitions and basic concepts- system, properties, state, process, cycle – heat and work – thermodynamic equilibrium. Zeroth law of thermodynamics – concept of temperature – temperature scales. First law of thermodynamics – concepts of internal energy and enthalpy. Second law of thermodynamics- Clausius and Kelvin –Plank statements- concept reversibility, availability and entropy. Thermodynamic processes-constant volume, constant pressure, isothermal, adiabatic, polytropic processes, throttling and free expansion, p-v and T-s diagrams- work done, heat exchanged, change in internal energy and change in entropy during the above processes. Air cycles – Carnot, Otto and Diesel cycles- air standard efficiency. 

 IC engines: 

 Working and comparison of two stroke and four stroke petrol and diesel engines – various systems – air system, fuel system, ignition system, governing system. Steam Boilers and 

Turbines:

Properties of steam- dryness fraction, enthalpy, entropy. Classification of boilers, Boiler mountings and accessories. Types of steam turbines- simple impulse and reaction type - parts of turbines, compounding of turbines. 

Pumps: 

 Types - centrifugal, reciprocating, gear and jet – applications – criteria for choice of pumps. 

Refrigeration and Air Conditioning: 

Simple vapour compression and vapour absorption refrigeration systems - Refrigerants. Psychrometry – definitions of terms. Air conditioning – parts of an A/C unit. 

 Mechanical power transmission systems: 

Belt drive- parts, different types- rope drive, chain drive- types, gear drives – types –spur, helical, herring bone, bevel, spiral, skew, hypoid, worm and wheel, rack and pinion. Velocity ratio, comparison and fields of application. Gear trains-simple, compound and epicyclic. 

 Manufacturing processes: 

Primary, secondary and tertiary production processes - moulding, sand casting, die casting, forging, punching, blanking, stamping, coining, rolling, extrusion, wire drawing, turning, boring, thread cutting, tapping, shaping, drilling, milling, reaming, grinding, broaching, honing, lapping, welding, soldering and brazing.


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