GAUHATI UNIVERSITY

SYLLABUS FOR FOURTH YEAR B. E. COURSE (1996 REVISION)

Department of Mechanical Engineering

Syllabus for BE (Mechanical)

THIRD SEMESTER

ME 376 ENGINEERING MECHANICS – II ( 3 1 2 )

Full marks – 100

Sessional – 50

Laboratory – 50

1.      Kinematics: Link, Pair, chain mechanism and inversions. Simple mechanism (description only), Crank slider, four bar, st. line, steering. Simple velocity and acceleration diagrams.

2.      Machine elements:

a) Governor: functions, type expressions for height of watt and porter governors.

b) Flywheel: Fluctuations of energy, Co-efficient of fluctuation of energy and speed, function of flywheel.

c) Brake and Clutch: Working principles only. Simple problems illustrating use of above.

3.      Balancing: Simple problems of rotary, primary unbalance, graphical solution.

4.      Transmission of Rotary drive:

d) Belt and Rope Drive: Relations for torque, maximum power transmission, length of open cross belting slip, crowing of pulley.

e) Gear train: Nomenclature , types – simple, compound , epicyclic gear train including reverted gear train. Simple description of automobile gear train.

Laboratory: Six experiments covering the syllabus. 

Books: Theory of machines by J. Lal , Metropolitan Books Ltd.  

ME 377 ENGINEERING GRAPHICS – III ( 0-0- )

Full marks – 100

Sessional – 100

Time – 3 hrs.

SCREW THREAD & SCREWED FASTENER:

Profiles of various threads; Representations of various kinds of threads; Different types of nuts and bolts; Locking devices for nuts.

RIVETTED JOINTS:

Different types of Laps and Butt joints; Rivetted joints of plates at right angles.

KEYS, JOINTS & COUPLINGS:

Different types of keys; cutter joints; knuckle joints; muff coupling; flange coupling; universal couplings.

PULLEYS:

Stop pulley and V-belt pulley.

PIPE JOINTS:

Flanged joint; Hydraulic joints.

GEARINGS:

Construction and representation of involute teeth profile and nomenclature.

ASSEMBLY DRAWING:

Engine parts: 1) Piston, 2) stuffing box, 3) Cross-head 4) Connecting and connecting ends 5) Eccentric.

Valves:

1.      Stop valve, 2) Feed check valves 3) Blow off cock 4) Non-return valve.

Bearings: 1) Thrust bearing 2) Pedestral bearing

Detailed workshop drawing:

Pipe vice, Chuck, Tail stock of lather screw jack; different symbols in workshop drawing.  

Books: 1. Machine drawing – N D Bhatt.

ME 378 WORKSHOP THEORY – I ( 3-2-1 )       

Full marks – 100

Sessional – 100

Time – 3 hrs.

Chapter I : Checking and measurement of surfaces: Use of Vernier Calliper, micrometer, screw gauge, height and depth gauge, V blocks, straight edges, radius gauge, feeler gauge, wire gauge, thread gauge, Bevel protractor, Combination set, bore gauge, Sinebar and slip gauges, Plug gauge and ring gauges, dial indicator, magnetic base, surface plate, measurement and representation of surface finish.

Chapter II: Limits , fits and tolerances: Introductory concept of limits of Size and their representations, Types of fit, Definitions of tolerance. IS code for grades of tolerance and fit, Hole basis and shaft basis systems.

Chapter III: Single point cutting tools: (1) Single point cutting tool nomenclature, (2) Tool signature, (3) Tool materials and fabrications, (4) Tool sharpening and function of tool angles.

Chapter IV: Lathe: (1) Functions of lathe, (2) Types of lathe, (3) Size of a lathe, (4) Different parts of a lathe, (5) Drive mechanisms for speed changing, reversing feed and screw cutting, Change gear calculations, (6) Taper turning methods, (7) Machining time calculations, (8) Lathe accessories and attachments.

Chapter V: Shaper: (1) Functions of a shaper, (2) Types and size of machines, (3) Different parts of a shaper, (4) Quick return and feed mechanisms, (5) Shaper operations, (6) Cutting speed and machining time.

Chapter VI: Planer: (1) Functions of planar, (2) Types and size of machines, (3) Difference of planar and shaper, (4) Table drive and feed mechanisms, (5) Planar operations, (6) Machining time.

Chapter VII: Pattern making and Sand casting: (1) Definitions of Pattern, (2) Pattern materials, (3) Types of patterns, (4) Pattern allowances, (5) Moulding tools and equipments, (6) Types of sand, composition and characteristics, (7) Preparation of sand moulds, gates, rises and cores, (8) typical moulding problems.

Chapter VIII : Welding (Arc, Gas) and Resistance: (1) Introduction to different welding methods and processes, (2) Oxyacetylene gas welding, types of flames and heat zones, welding kit, use of flux and welding rods, Welding defects, Gas welding techniques, (3) Electric arc welding, direct and reverse polarity, types of arc welding electrodes, construction of coated electrodes, welding equipments and layout, (4) Principle of operation and types of resistance welding processes, (5) Soldering and Blazing.

Chapter IX: General maintenance of Workshop anf Safety: General precautionary steps for safety and maintenance of workshop, clearing and greasing, lighting and ventilation.  

BOOKS:

1.      Workshop Technology Vol I & II by S K HazraChoudhury

2.      Workshop Technology Vol I, II & III by W A J Chapman

3.      Production Technology by R K Jain

4.     Manufacturing Processes by Begman.  

ME 379 BASIC THERMODYNAMICS

Theory – 100

Sessional – 50

System and Continuum:

Intensive and Extensive properties – Thermodynamic state, pressure, energy, work and heat – process and cycle – Macroscopic and Microscopic points of view – Kinetic theory of gases.

Laws of thermodynamics:

Zeroth law – Concept of equilibrium – Principles of thermometry – Fixed points.

First law of thermodynamics and its application to open and closed systems – Concept of internal energy – Steady flow energy equation – Processes of closed systems.

Second law of thermodynamics – Various statements – Carnot cycle – Irreversible and Irreversible processes – Thermodynamic efficiency and temperature scales – Concept of entropy – Entropy changes in various processes.

Ideal gas :

Equation of state and universal gas constant – Mixture of ideal gases – Partial pressure – Evaluation of gas constant and specific heat from constituent values.

Properties of steam:

Latent heat – Saturation pressure and temperature – Dryness fraction – Degree of superheat – Total heat.

Thermodynamic cycles:

Otto, Diesel and Rankine cycles – Principles of working and description of two and four stroke SI and CI engines – Representations of processes on T-S and p-v diagrams.

Fuels and Combustions:  

Books :

1.      Engineering thermodynamics by P K Nag.

2.     Fundamentals of thermodynamics by Cengel and Boles.