1

CURRICULUM AND SCHEME OF EXAMINATION

DIPLOMA IN AUTOMOBILE ENGINEERING

III TERM

Total 35 27 150 450 600 18

Code No Course NameHrs /

Week Internal External TotalCredit

Scheme of ExaminationAllocation marks

Dura-t ion

ofexam

IV TERM

Code No Course NameHrs /Week Internal External Total

Credit

Scheme of ExaminationAllocation marks

Dura-t ion

ofexam

8201 Mechanics of Materials * 6 6 25 75 100 3

8202 Manufacturing Processes * 5 5 25 75 100 3

8203 Fluid Mechanics & Fluid Power * 6 6 25 75 100 3

8204 Machine Drawing * 6 4 25 75 100 3

8205 Mechanics of Materials &

Fluid Mechanics Lab * 6 3 25 75 100 3

8206 Workshop - I

(Foundry, Welding & Smithy)* 6 3 25 75 100 3

* Common with Diploma in Mechanical Engineering

8207 Applied Thermo Dynamics * 7 7 25 75 100 3

8208 Machine Shop Technology * 7 7 25 75 100

8209 Electrical & Electronics Engineering * 6 6 25 75 100 3

8210 Auto CAD Lab * 6 3 25 75 100 3

8211 Electrical & Electronics 3 1.5 25 75 100 3

Engineering Lab *

8212 Workshop - II (Lathe & Metrology) * 6 3 25 75 100 3

Total 35 27.5 150 450 600 18

* Common with Diploma in Mechanical Engineering

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8201 MECHANICS OF MATERIALSIII TERM (Core Course)

6 Hours / Week Total Hours - 72 Hrs

MAJOR DIVISIONS:

UNIT I a) Mechanical Properties of Materialsb) Simple Stresses and strains

UNIT I I a) Geometrical Properties of Sectionsb) Thin Cylinders and Spherical Shells

UNIT III a) Shear Force and Bending Moment Diagramb) Theory of Simple Bending & Deflection of Beams

UNIT IV a) Torsionb) Springs

UNIT V a) Frictionb) Transmission of Motion

UNIT I

a) MECHANICAL PROPERTIES OF MATERIALS (15 Hrs)

Importance of mechanical properties of materials - definition and briefexplanation of mechanical properties – strength, elasticity, plasticity, ductility,malleability, stiffness, toughness, brittleness, hardness, wear resistance, machinability, castabilityand weldability – fatigue strength, creep – mechanical and temperature creep – cyclic loading andrepeated loading.

b) SIMPLE STRESSES AND STRAINS

Introduction - behaviour of materials when subjected to load - definition – stress andstrain – classification of force system – tensile, compressive, shear, bending and torsional forcesystem – behaviour of metals in tension upto rupture – stress – strain diagram – limit ofproportionality – elastic limit – yield point – breaking point – ultimate stress – percentageelongation and percentage reduction in area – problems – Hooke’s law – Young’s modulus –working stress – factor of safety – bars of varying section – shear stress and shear strain –modulus of rigidity – problems in tension and compression.

Lateral strain – Poisson’s ratio – volumetric strain – bulk modulus –elastic constantsand their relationship – problems connecting lateral, linear and volumetric deformation – problemson elastic constants.

Composite bars subjected to tension and compression - temperature stress and strain – problems–

no problems in temperature stresses for composite bars - strain energy due to axial load – proofresilience – modulus of resilience – stresses due to gradual, sudden and impact loads –problemscomputing stress and deformation in gradual, sudden, impact and shock loading.

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UNIT II

a) GEOMETRICAL PROPERTIES OF SECTIONS : (15Hrs)

Introduction - centre of gravity – centroid – position of centroids of plane geometricalfigures such as rectangle, triangle, circle and trapezium – determination of centroid of angles,channels, I and T sections – problems – moment of inertia – definition – parallel axes theorem –perpendicular axes theorem - M.I of laminae of rectangle, circle, triangle, angle, channel, I and Tsections - no derivations required – polar moment of inertia – radius of gyration – problems.

b) THIN CYLINDERS AND SPHERICAL SHELLS

Introduction to thin and thick cylindrical shells – failure of thin cylindrical shell subjectedto internal pressure – derivation of Hoop stress and longitudinal stress – maximum shear stress-problems – change in dimensions and volume of a thin cylindrical shell due to internal pressure– problems – change in diameter and volume of a thin spherical shell due to internal pressure –problems.

UNIT III

a) SHEAR FORCE AND BENDING MOMENT DIAGRAMS: (18Hrs)

Introduction – classification of beams – definition - shear force - bending moment –sign convention – types of loads – relation between load, shear force and bending moment –S.F.D and B.M.D of cantilever and SSB subjected to concentrated load and UDL only –maximum Bending moment - problems on S.F.D and B.M.D for cantilever and S.S.B only.

b) THEORY OF SIMPLE BENDING AND DEFLECTION OF BEAMS

Introduction – theory of simple bending – assumptions – neutral axis - bending stressdistribution – moment of resistance – derivation of flexural formula M/I = f/y = E/R – sectionmodulus – strength and stiffness of beam – problems involving bending equation only.

Deflection – definition of slope and deflection – relation between curvature, slope anddeflection – deflection and slope of cantilever and S.S.B under point loads and udl – doubleintegration method - problems on slope and deflection.

UNIT IVa) TORSION (10Hrs)

Introduction- theory of torsion and assumptions - derivation of torsion equation T/J =fs/R = Cè / l – torsion of solid and hollow circular shafts – power transmitted – polar modulus –

torsional rigidity – strength and stiffness of shafts – comparison of hollow and solid shafts inweight and strength considerations - problems.

b) SPRINGS

Types of springs – laminated and coiled springs - closely coiled helical springs subjectedto axial load – problem to determine maximum shear stress, deflection, stiffness and resilience of

closely coiled helical springs only.

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UNIT V

a) FRICTION : (14 Hrs)

Friction – force of friction – limiting friction – static friction – dynamic friction – lawsof static and dynamic friction – angle of friction – co-efficient of friction – cone of friction -resultant force of friction on sliding body on inclined plane.

b) TRANSMISSION OF MOTION :

i) Belt Drives

Introduction – classification of belt drives – flat belt, V belt and rope drives – open andcrossed belt drives – belt materials – merits and demerits of flat, V belts and ropes – velocity ratioof belt drive – effect of belt thickness on velocity ratio – slip of belt – velocity ratio of compoundbelting – length of belt in open and crossed belt drives - no derivations – problems – angle ofcontact – laws of belting – belt connecting parallel and perpendicular shafts – ratio of tension inflat, V belts and ropes(no derivation) – power transmission by belts – centrifugal tension –condition for maximum power transmission – design of flat belts –problems.

ii) Gear Drives and Chain Drives

Types of gears – Nomenclature of gear – spur, helical and bevel gears – worm andworm wheel – rack and pinion – velocity ratio of a gear drive – merits and demerits of gear drive– simple gear train – compound gear train – problems – epicyclic gear train – applications– chaindrive – types - definition – applications

REFERENCE BOOK

1. Bansal.R.K, “Text book of Strength of Materials” Laxmi Publications, 2004.2. Khurmi.R.S, “Strength of Materials” S.Chand & Company, 1993.3. Ramamurtham.S, “Strength of Materials” Dhanpat Rai Publications, 1999.4. Prasad.L.B, “Engineering Maechanics and strength of Materials” Khanna Publishers,

Delhi, 1995.5. Khurmi.R.S, “A Text Book of Applied Mechanics” S.Chand & Company, 1983.

6. U.L.Jindal, “Applied Mechanics: Statics and Strength Of Materials”, Galgotia Pub, 2000.7. A.S.Sarao and D.S.Khosla, “Fundamentals of Applied Mechanics”, Satya Prakashan,

1997.8. Egor.P.Popov, “Engineering Mechanics and Solids”, PHI, 2000.

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8201 MECHANICS OF MATERIALSModel Question Paper

Time : 3 Hrs Max.Marks : 75

NOTE : 1. Answer all questions . Choosing any one from Part - A (5marks) and one from Part - B (10marks)2. All Questions carry equal marks.

I. A. i) State Hook’s law and define factor of safety.ii) Define the properties of ductility and malleability

B i) A Steel bar 2m long 20mm wide and 10mm thick is subjected to a pullof 20 KN in the direction of its length.Find the changes in length, breath andthickness.Take E = 2OO KN /

mm2 & Poisson’s ratio = 0.25.

ii) A Spherical ball of 500mm dia,when subjected to a hydrostatic pressure of 5 Mpa isfound to shrink to a ball of 498.8mm dia.If the Poisson’s ratio of the ball is 0.24,findE.

II. A. i) Distinguish between moment of inertia and polar moment of inertia.ii) Differentiate between the longitudinal stress and circumferential stress in thin cylinders

subjected to internal pressure.

B. i) Find the moment of inertia about the centroidal axes of an angle section 90 x 75x 20 mm thick with its 90 x 20 mm flange being vertical.

ii) Calculate the increase in volume enclosed by a boiler shell 2.5 long,1min diameter when it is subjected to an internal pressure of 150N/mm2. The wallthickness is such that

the maximum tensile stress in the shell is 2150 N / mm2

underthis pressure, E = 200 KN / mm2 , 1/m = 0.3.

III. A. i) What are the different types of beams.ii) State any five assumptions made in theory of simple bending.

B. i). A Simply supported beam of length 8m carries a udl of 1KN / m for the entire span.It also carries a point load of 10 KN at its centre.Find out the max deflection of thebeam.E=200KN/mm2

and I=200 x 106 mm4.

ii) A timber beam is freely supported on supports 6m apart.It carries a udl of12KN / m for the entire span and a concentrated load of 9 KN at 3.5 m from the right

support.If the stress in timber is not to exceed 8N/mm2 , design a suitable rectangular

section with depth equal to twice the breath IV.A.

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IV. A. i) What are the advantages of hollow shaft over the solid shaft?ii) State the assumptions made in theory of pure torsion.

B. i). A hollow circular shaft of external diameter 75 mm and internal diameter40 mm is to transmit power at a speed of 40 rpm.If the maximum shearstress is not to exceed 80N/mm2 . Calculate the power in kW transmittedby the shaft.

ii) Derive expressions for maximum slope and deflection of a simplysupported beam with a central point load.

V. A. i) Define Co-efficient of friction,angle of friction and cone of friction.ii) State the Law of belting.

B. i) In a flat belt the initial tension is 180N.The angle of lap of the smaller pulley is 170º.

The co- efficient of friction between the belt and pulley surface is 0.215.Dia of pulleyis 900 mm and it runs at 540 rpm. Determine the power that can be transmitted at theabove speed. Neglect the effect of centrifugal tension.

ii) In a spur gear arrangement,the power transmitted is 3 kN.The driving pinionhas 30 teeth and 40 mm circular pitch.Calculate the speed in rpm for thepinion.If the pressure between the teeth exerted is not to exceed 600 N.

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8202 MANUFACTURING PROCESSES

III TERM (Core Course)

5 Hours/Week Total Hours : 60 Hrs

MAJOR DIVISIONS:

UNIT I FoundryUNIT II Forging and WeldingUNIT III Powder metallurgy and Heat TreatmentUNIT IV Lathe work and Theory of metal cuttingUNIT V Metrology, Press working and Non-Conventional machining processes

UNIT I: FOUNDRY (13 Hrs)

Patterns – definition – pattern materials- factors for selecting pattern materials – singlepiece solid, split patterns – pattern allowances – core prints – use of core boxes - moulding –definition – moulding boxes, moulding sand – ingredients - silica – clay – moisture andmiscellaneous materials – properties of moulding sand – sand additives – moulding sand preparation– mixing – tempering and conditioning –types of moulding – green sand – dry sand – machinemoulding – top and bottom squeezer machines – jolting machines - sand slinger – core – CO

2process core making – types of core – casting using green sand and dry sand mould – definition-sand casting - gravity die casting –pressure die casting – hot and cold - chamber casting -centrifugal casting - continuous casting - chilled casting – malleable casting – melting of cast iron– cupola furnace– melting of non –ferrous metals – crucible and arc furnaces – induction furnaces– instrument for measuring temperature - optical pyrometer - thermo electric pyrometers –cleaning of casting - fetling - tumbling , trimming sand and shot blasting – defects in casting –causes and remedies – safety practices in foundry.

UNIT II : FORGING AND WELDING (12 Hrs)

Cold forging and hot forging – advantages of hot working - hot working operations– rolling – forging , hammer or smith forging, drop forging , upset forging , press forging - rollforging.

Welding – arc welding definition – arc welding equipment – arc welding methods -carbon arc, metal arc, metal inert gas ( MIG), tungsten inert gas (TIG) atomic hydrogen , plasma

arc, submerged arc and electro – slag welding - gas welding - definition oxy acetylene welding– resistance welding – definition -

classification of resistance welding - butt- spot – seam - projection welding – weldingrelated processes – oxy-acetylene cutting – arc cutting - hard facing -bronze welding - solderingand brazing special welding processes – cast iron welding – thermit welding – solid statewelding, ultrasonic, diffusion and explosive welding - explosive cladding- modern welding,electron beam and laser beam welding- types of welded joints – merits and demerits of welded

joints – inspection and testing of welded joints– destructive and nondestructive types of tests –magnetic particle test -radiographic and ultrasonic test – defects in welding-causes and remedies– safety practices in welding-three types of flames – gas welding equipment.

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UNIT III

POWDER METALLURGY AND HEAT TREATMENT OF METALS (10Hrs)

Methods of manufacturing metal powders - atomization reduction of oxidesand electrolytic deposition – pressing operation – sintering – hot pressing – sizing– infiltration - mechanical properties of parts made by powder metallurgy - designrules for the powder metallurgy process.

Heat treatment processes – purpose – procedures – applications of various heat treatmentprocesses - iron-carbon equilibrium diagram – full annealing - process annealing -stress reliefannealing – spherodising annealing – iso thermal annealing – normalizing –hardening – tempering– quenching medium - different types and their relative merits – case hardening –pack carbursing- cyaniding - nitriding – induction hardening and flame hardening.

UNIT IV: LATHE AND THEORY OF METAL CUTTING (12 Hrs)

Types of lathes – specifications – simple sketches - principal parts – head stock – backgeared type – all geared type – tumbler gear mechanism – quick change gear box – apronmechanism – carriage cross slide – automatic, longitudinal – and cross feed mechanism – tailstock and its functions - work holding devices – face plate – three jaw chuck - four jaw chuck-catch plate and carrier – types of centers – machining operations done on lathe – lathe attachments– tool post grinders - milling attachments.

Methods of taper turning in lathe – cutting tool materials - high carbon steel – highspeed steel - setellite - carbide – ceramic- single point tool –nomenclature – chip breakers – toollife - cutting speeds and feeds.

UNIT – V : METROLOGY, PRESS WORKING AND NON-CONVENTIONAL MACHINING PROCESSES (13 Hrs)

Metrology :

Metrology – micro meter – vernier calipers - vernier height gauge – digital type vernier– micrometers – depth gauges – inside and outside micrometers – applications – feeler gauges –plug and ring gauges – snap gauges – thread micrometers – gear tooth vernier – bevel protractor– slip gauges – sine bar – comparators – mechanical dial gauges – electrical, optical and pneumaticcomparators – profile measurements – optical flat – surface finish measurements – profilometers- coordinate measuring machine.

Press working :

Types of presses – mechanical and hydraulic presses – press tools and accessories -press working operations –bending operations – angle bending – curling - seaming – shearingoperations – blanking, punching- curling off – trimming - notching -slitting – lancing – shaving.

Non-Conventional Machining process :

Ultrasonic machining – chemical machining – electro chemical grinding – electricaldischarge machining - wire cut EDM– plasma arc machining – laser machining.

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REFERENCE:

1. Kalpakjian, “Manufacturing Engineering & Technology” Addison Wesley, 1995.

2. Hajra Chowdry & Bhattacharya, “Elements of Workshop Technology Vol I”Media Promoters,2005.

3. Begeman, “Manufacturing Process” The Book Centre.

4. Chapman.W.A.J, “Workshop Technology: Part 1:Introductory Course ” Viva Book (P) Ltd,New Delhi, 1998.

5. Chapman, “Workshop Technology : Part 2” Viva Book (P) Ltd, 2000.

6. Chapman, “Workshop Technology : Part 3” Viva Book (P) Ltd, 1998.

7. Raghu wanshi, “Workshop Technology” Dhanpat Raj Publications, 1987.

8. Jain.A.K, “Production Technology” Khanna Puplisher, 15th Edition.

9. HMT, “Production Technology” Tata Mcgraw Hill, 16th Edition.

10. Khurmi, “Workshop Technology” Niraj Construction & Development Co (P) Ltd ND,1981.

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8202 MANUFACTURING PROCESSESModel Question Paper

Time : 3 Hrs Max.Marks : 75

NOTE : 1. Answer all questions . Choosing any one from Part - A (5marks) and one fromPart - B (10marks)

2. All Questions carry equal marks.

I. A. i) What are the factors to be considered for the selection of pattern materials?ii) State the advantages of die casting.

B. i) Draw a simple sketch of a cupola furnace and explain its working.ii) Explain the continuous casting process.

II. A. i) State the advantages of Hot working.ii) Name the equipments required for Gas welding.

B. i) With the aid of simple sketch, explain the ultrasonic testing of welded joint.ii) Sketch and explain MIG Welding process

III A. i) What are the different quenching medium and state their uses?.ii) Explain the process of pack carburising.

B. i) What are the methods of manufacturing of metal powders? Explain anyone method.ii) Write short notes on the following:

a) Cyaniding. b) Nitriding.

IV A i) State the principle parts of a lathe.ii) What are the different type of operations done on a lathe?

B i) Explain the Apron mechanism in latheii) Explain the nomenclature of a single point cutting tool.

V. A. i) Explain the Angular measurement using sine bar and slip gauges.ii) Describe angle bending operation.

B. i) Explain Ultrasonic Machining with a simple sketch.ii) With the aid of line diagram , describe pneumatic comparator.

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8203 FLUID MECHANICS & FLUID POWER

III TERM (Core Course)

6Hours / Week Total Hours – 72 Hours

MAJOR DIVISIONS:

UNIT I Properties of fluids and Hydrostatic forcesUNIT I I Flow of fluids and Flow through pipesUNIT III Impact of jets and Hydraulic turbinesUNIT IV Centrifugal and Reciprocating pumpsUNIT V Pneumatic and Hydraulic systems

UNIT I : PROPERTIES OF FLUIDS AND HYDROSTATIC FORCES (13 Hrs)

Introduction – definition of fluid – classification of fluids – ideal and real fluids– properties of a fluid – definition and units.

Pressure – units of pressure – pressure head – atmospheric, gauge and absolutepressure – problems – Pascal’s law and its applications – pressure measurement – piezometertube – simple U-tube manometer – differential U-tube manometer – problems – precautions inusing manometers – mechanical gauges – Bourdon’s tube pressure gauge – diaphragm pressuregauge.

Hydrostatic forces – definition – total pressure – centre of pressure – total pressure andcentre of pressure on plane surface immersed – horizontally, vertically and inclined in a liquid –problems - pressure diagrams – problems.

UNIT II : FLOW OF FLUIDS AND FLOW THROUGH PIPES (16 Hrs)

Types of fluid flow – path line and stream line – mean velocity of flow – discharge ofa flowing fluid – equation of continuity of fluid flow – energies of fluid – Bernoulli’s theorem –statement, assumptions and proof – applications and limitations of Bernoulli’s theorem –Venturimeter – derivation for discharge – orifice meter – differences between Venturi meter and orificemeter – problems.

Orifice – types – applications – hydraulic coefficients – determining hydraulicscoefficients – discharge through orifice discharging freely – problems – mouth pieces –

classifications – discharge through external cylindrical mouth piece – problems.

Flow through pipes – laws of fluid friction – hydraulic gradient line – total energy line– wetted perimeter – hydraulic mean radius – loss of head due to friction – Darcy-Weisbachequation and Chezy’s formula – problems - minor losses (description only) – power transmission

through pipes – problems.

UNIT III : IMPACT OF JETS AND HYDRAULIC TURBINES (15 Hrs)

Impact of jet – on a stationary flat plate held normal to the jet and inclined to thedirection of jet – on a flat plate moving in the direction of jet – on a series of moving plates orvanes ( description only )  – force exerted and work done by the jet– problems.

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Hydraulics turbines – classifications – Pelton wheel – components andworking – speed regulation – work done and efficiency of Pelton wheel – workingproportions – problems – Francis and Kaplan turbines – components and working– draft tube – functions and types – surge tank – simple surge tank – differencesbetween impulse and reaction turbines.

UNIT IV : CENTRIFUGAL AND RECIPROCATING PUMPS (13 Hrs)

Centrifugal pumps – classifications – working of single stage – components (withtypes if any) multi stage pumps – advantages – priming – priming chamber – head of a pump –manometric, mechanical, overall efficiencies – problems – cavitation – special pumps – deep welland jet pumps – trouble shooting in centrifugal pumps.

Reciprocating pumps – classifications – working of single acting and double actingreciprocating pumps – plunger and piston pumps – discharge of a reciprocating pump- theoreticalpower required – coefficient of discharge – slip – problems – negative slip – indicator diagram –separation – air vessels (functions and working).

UNIT V : PNEUMATIC AND HYDRAULIC SYSTEMS (15 Hrs)

Pneumatic systems – elements – filter – regulator – lubricator unit – pressure controlvalves – pressure relief valves – pressure regulation valves – directional control valves – 3/2DCV, 4/2 DCV, 4/3 DCV, 5/2 DCV, 5/3 DCV- flow control valves – throttle, shuttle and quickexhaust values – ISO symbols of pneumatic components – pneumatic circuits – direct control ofsingle acting cylinder – operation of double acting cylinder – operation of double acting cylinderwith metering-in control / metering-out control –use of shuttle valve in pneumatic circuits – useof quick exhaust valve in pneumatic circuits – automatic operation of double acting cylinder –merits and demerits of pneumatic system – applications.

Hydraulic system – elements – merits and demerits – service properties of hydraulicfluids – hydraulic accumulators – weighted or gravity, spring loaded, gas operated, bladder typeaccumulators – fluid power pumps – external and internal gear, vane and piston pumps – ISOsymbols for hydraulic components – hydraulic circuits using sequence valve – counter balancevalve – hydraulic circuit for – shaping machine, surface grinding or milling machine – hydraulicjack – hydraulic lift – hydraulic intensifiers – hydraulic press – pneumatic system Vs hydraulicsystem.

REFERNCE BOOKS :

1. Khurni.R.S, “Hydraulic and Hydraulic Machines” S.Chand & Company, 1997.

2. Bansal.R.K, “Fluid Mechanics and Hydraulic Machines” Laxmi Puplications, 1996.

3. Rajput.R.K, “A Text Book of Hydraulics” S.Chand & Company, 1998.

4. S.Ramamrutham, “Hydraulics, Fluid Mechanics and Fluid Machines” Dhanpat RaiPublications, 2003.

5. Andrew Parr, “Hydraulics and Pneumatics”, Jaico Publishing House, 2004.

6. S.R.Manjumdar, “Oil Hydraulic System”, Tmh, 2006.

7. R.Srinivasan, “Hydraulics and Pneumatic Controls” Vijay Nicole, 2004.

8. K.Shanmuga Sundharam, “Hydraulics and Pneumatic Controls” S.Chand, 2006.

9. V.P.Vasandani, “Hydraulic Machines: Theory and Design”, Khanna Pub, 2004.

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8203 FLUID MECHANICS & FLUID POWER

Model Question Paper

Time : 3 Hrs Max.Marks : 75

NOTE : 1. Answer all questions . Choosing any one from Part - A (5marks) andone from Part - B (10marks)

2. All Questions carry equal marks.

I. A i) Explain the following properties of the fluid and state their units.(a) Density (b) specific weight (c) specific gravity

ii) Describe the working of a bourdon tube pressure gauge.

B i) A circular ring of 2.5m external and 1.5 m internal diameters is vertically immersedin water such that the center of the plate is 3.6 m deep from the free surface ofwater. Determine the total pressure and depth of the center of pressure.

ii) A left limb of an U – tube manometer is opened to atmosphere and right limb isconnected to the pipe carrying water pressure. The center of the pipe is at the levelof free surface of mercury. Find the difference in the level of mercury in the limbs,if the absolute pressure of water in the pipe is 15 m of water.

II. A i) Define hydraulics co efficient.ii) Define hydraulic gradient line and wetted perimeter.

B i) State and prove Bernoulli’s theorem.ii) A venturimeter of size 300 x 100 mm is fitted to the horizontal pipe. Mercury the

manometer is connected to the venturimeter reads 100 mm. Find the discharge ofthrough the pipe, if co efficient of venturimeter is 0.98

III. A i) Derive an expression for the force exerted by the jet on a moving flat plateii) Explain the function of following

(a) surge tank b) draft tube

B i) A jet of water 80 mm dia with a velocity of 15 m/sec and strikes a series of vanesmoving with a velocity of 10 m/sec. Find (a) force exerted by the jet. (b) Work doneby the jet.

ii) Explain with neat sketch the working principle of kaplan turbine.

IV A i) Explain any four common troubles in centrifugal pumps with their remediesii) Draw a neat sketch of piston type reciprocating pump and name its parts.

B i) Draw a neat sketch and illustrate the parts of a centrifugal pump and explain itsworking principle.

ii) A single reciprocating pump has a plunger diameter of 250 mm and a stroke of 350mm .If the speed of the pump is 60 rpm and delivers 16.5 lps. Find (a) theoreticaldischarge (b) coefficient of discharge (c) slip and (d) percentage of slip.

V. A i) Write short notes on FRL unit..ii) Explain with neat sketch the working of bladder type accumulator.

B i) Explain the working of 4/3 DC valve with neat sketch.ii) Explain the working of an external gear pump with a neat sketch.

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8204 MACHINE DRAWING

III TERM (Core Course)

6 Hours /Week Total Hours - 72 Hours

MAJOR DIVISIONS :

UNIT I Sectional ViewsUNIT II Threaded Fasteners and Machine ElementsUNIT III Limits, Fits, Tolerance and Surface FinishUNIT IV Assembly Drawings

UNIT I : SECTIONAL VIEWS (4 Hrs)

Review of orthogonal and isometric views - need for sectioning – sectional views-

cutting plane- type of sections – full section – half section – removed section – revolved section

– offset section – local section – thin section – section line ( Hatching line)

UNIT II : THREADED FASTENERS AND MACHINE ELEMENTS (6 Hrs)

Types of fasteners – temporary – permanent – nomenclature of threads – types of

threads – V threads – square threads, left hand and right hand threads – internal and external

threads – hexagonal and square bolts and nuts – empirical proportions to draw rivet heads, keys

(Taper keys, parallel keys and woodruff keys)

UNIT III : LIMITS, FITS, TOLERANCE AND SURFACE FINISH (8 Hrs)

Limits – fits and tolerance – hole basis system – shaft basis system – types of fits –selection of fits and applications – types of tolerance - tolerance of form and position – geometrictolerance - indication of tolerances and fits on the drawing – roughness, waviness and lay –production methods and surface quality – symbols for lay.

UNIT IV : ASSEMBLY DRAWINGS (with indication of fit designations wherever necessary) (54 Hrs)

1. Sleeve and cotter joint

2. Gib and cotter joint3. Knuckle joint4. Flange coupling5. Universal coupling6. Protected type flange coupling

7. Plummer block

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8. Swivel bearing9. Simple eccentric10. Screw jack11. Petrol engine connecting rod12. Stuffing box13. Machine vice14. Tail stock

REFERENCES:

1. Gupta.R.B, “A Text Book of Machine Drawing” Satya Prakasan, 1984.

2. Bhatt.N.D,”Machine Drawing” Charotar Book Stall , 1973.

3. Gopalakrishnan.K.R, “Machine Drawing” 1998.

4. Gilli.P.S, “Machine Drawing” S.K.Kararia & Sons, 1997.

5. PSG, “Design Data Book”PSG Coimbatore, 1982.

6. BIS, “BIS Engineering Drawing Practice for Schools and Colleges” BIS, 1989.

7. M.L.Mathur, R.S.Vaishwanar, “Engineering Drawing and Graphics”, Jain Bros, 2002.

8. R.K.Dhawan, “Machine Drawing”, S.Chand, 1996.

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8204 MACHINE DRAWING

Model Question Paper

Time : 3 Hrs Max.Marks : 75

Note: 1. Answer all questions.a. Answer part A in Additional sheet and part B in drawing sheetb. First angle projection shall be followed.c. Missing Dimensions may be suitably assumed.

Answer ANY FOUR questions: (4 x 5 = 20 )

PART A

i. What is meant by offset section? What are the reasons for local section?ii. What are the different types of Nuts? State its application.iii. What are the different types of Rivet heads? State atleast two application of

rivetting.iv. What is meant by Hole Basis and shaft Basis system?v. Findout the maximum and minimum clearance of a fit with the designation 100

H 11/g7.vi. Explain the surface roughness symbol with all its features.

PART B

The details of SIMPLE ECCENTRIC are shown.Assemble the parts and draw tofull scale. (55)

i. Top half sectional elevationii. Planiii. Bill of materials

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8205 MECHANICS OF MATERIALS AND FLUID MECHANICS LAB

III TERM (Core Course)

6 Hours/Week Total Hours : 72 Hrs

I . MECHANICS OF MATERIALS LAB

Experiments:

1. Test on Ductile Materials :

Finding Young’s modulus of elasticity, yield points, percentage elongation and per-centage reduction in area, stress-strain diagram plotting, tests on mild steel and cast iron.

2. Hardness Test:

Determination of Rock well’s hardness number for various materials like mild steel,high carbon steel, brass, copper and aluminium

3. Torsion Test:

Torsion test on mild steel – relation between torque and angle of twist-determination ofshear modulus-determination of elastic constants for mild steel.

4. Bending and deflection tests:

Determination of Young’s modulus for steel by deflection test.

5. Impact test:

Finding the resistance of materials to impact loads by Izod test or Charpy test.

6.Tests on springs of circular section:

Determination of modulus of rigidity, strain energy, shear stress by load deflectionmethod – Compression and tension test (Closed coil spring only)

7.Shear Test:

Shear test on M.S. bar

II . FLUID MECHANICS LAB

STUDY OF HYDRAULICS & PNEUMATIC SYSTEM (Not for Examination)

1. Pneumatic System:

Study of pneumatic system and its elements – FRL unit pressure Relief valve –Directional control valves – flow control valve.

2. Hydraulic system:

Study of basic hydraulic system and its elements – filter, pressure relief valve, DCV

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and FCV – Hydraulic system Vs pneumatic system - Hydraulic oil and its properties. Resources required:

Pneumatic trainer kit with air compressorHydraulic trainer kit with hydraulic power pack

EXPERIMENTS

1. Bernoulli’s theorem

Verifying the Bernoulli’s theorem

2. Venturi Meter / Orifice meter

Determine the coefficient of meter

3. Pipe friction

Determine the friction factor

4. Reciprocating pump

Performance test on reciprocating pump (Characteristic curves)

5. Centrifugal pump

Performance test on centrifugal pump (Characteristic curves)

6. Impulse turbine

Performance test on impulse turbine.

7. Reaction turbine

Performance test on reaction turbine.

8. Small orifice

Determine the coefficient of discharge through Small orifice piece Byconstant head method and variable head method.

9. External mouth piece

Determine the coefficient of discharge through External mouth piece By variable headmethod and constant head method.

SCHEME OF EXAMINATION

S.No. Topic Marks

1 Exercise (Anyone from Mechanics of

Materials Lab / Fluid Mechanics Lab ) 70

2 Viva Voce 5

20

Total 75

8206 WORKSHOP - I

FOUNDRY, WELDING & SMITHYIII TERM (Core Course)

6 Hours / Week Total Hours: 72 Hrs

I. FOUNDRY EXERCISES

Preparation of sand mould:

1. Single Piece Pattern

a) Cubeb) Flangec) Pulleyd) Gear Wheel

2. Split Pattern

a) Straight Pipeb) Bend Pipec) Thumbles

3. Core making (Not for Examination)

a) Cylindrical core

4. Melting and casting (Demonstration only)

Melting non ferrous metal and making sand casting using any one of the pattern in anyone of the following furnace.

a) Oil fired crucible furnace

b) Pit furnace

II. WELDING EXERCISES

1. Arc weldinga) Lap jointb) Butt joint

c) T- joint

21

d) Corner joint Material : 25mm x 6 mm MS Flat

2. Gas welding

a) Lap jointb) Butt jointc) Gas cutting - Profile cutting ( Not for Examination )

Material : 25mm x 3 mm MS Flat

3. Soldering and Brazing (Demonstration only)

III . SMITHY EXERCISES

1. Round rod to hexagonal rod2. Round rod to square rod3. Round rod to square headed bolt4. Round rod to hexagonal headed bolt5. Round rod to flat with width 25mm

Material: Dia 16mm x 100mm Length

SCHEME OF EXAMINATIONS.N o. T opic M arks

1 Foundry 50

2 A ny one by lot

W elding / Sm ithy 20

3 V iva V oce 5

Total 100