Docstoc

Detailed Syllabus NACHIMUTHU

Document Sample
Detailed Syllabus NACHIMUTHU Powered By Docstoc
					                 NACHIMUTHU POLYTECHNIC COLLEGE : POLLACHI

                    DEPARTMENT OF MECHANICAL ENGINEERING


                                    III TERM - SYLLABUS


                                                                  Scheme of Examination   Duration
S.   Code                                    Hours /
                    Course Name                        Credit       Allocation of Marks   of Exam
No   No.                                      week
                                                                Internal External Total     (Hrs)

1.   2201   Mechanics of Materials             6         6        25       75      100       3
2.   2202   Manufacturing Processes            5         5        25       75      100       3
3.   2203   Fluid Mechanics & Fluid Power      6         6        25       75      100       3
4.   2204   Machine Drawing                    6         4        25       75      100       3
5.   2205   Mechanics of Materials & Fluid     6         3        25       75      100       3
            Mechanics Lab.
6.   2206   Workshop – I                       6         3        25       75      100       3
            (Foundry, Welding, Smithy
            &Lathe Work)
            Total                              35       27       150       450     600      18




                                                1
                          2201     MECHANICS OF MATERIALS
                                     III - TERM (Core)



6 Hours / Week                                                       Total Hours - 72 Hrs


MAJOR DIVISIONS:


UNIT I       a) Mechanical Properties Of Materials
             b) Simple Stresses And Strains
UNIT II      a) Geometrical Properties Of Sections
             b) Thin Cylinders And Spherical Shells
UNIT III     a) Shear Force And Bending Moment Diagrams
             b) Theory of simple bending and deflection of beams
UNIT IV      a) Torsion
             b) Springs
UNIT V       a) Friction
             b) Transmission Of Motion

UNIT I:
a)    MECHANICAL PROPERTIES OF MATERIALS                                                   (15 Hrs)
             Importance of mechanical properties of materials- definition and brief explanation
      of mechanical properties – strength, elasticity, plasticity, ductility, malleability, stiffness,
      toughness, brittleness, hardness, wear resistance, machinability, castability and
      weldability – fatigue strength, creep – mechanical and temperature creep – cyclic loading
      and repeated loading.

b)    SIMPLE STRESSES AND STRAINS
              Introduction - behaviour of materials when subjected to load - definition – stress
      and strain – classification of force system – tensile, compressive, shear, bending and
      torsional force system – behaviour of metals in tension upto rupture – stress – strain
      diagram – limit of proportionality – elastic limit – yield point – breaking point – ultimate
      stress – percentage elongation 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
      constants and their relationship – problems connecting lateral, linear and volumetric
      deformation – problems on 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 – proof resilience – modulus of resilience – stresses due to gradual,
      sudden and impact loads –problems computing stress and deformation in gradual,
      sudden, impact and shock loading.


                                                 2
UNIT II :


a)    GEOMETRICAL PROPERTIES OF SECTIONS :                                               (15Hrs)
              Introduction - centre of gravity – centroid – position of centroids of plane
      geometrical figures 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 T sections - 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
      subjected to 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
      stress distribution – moment of resistance – derivation of flexural formula M/I = f/y = E/
      R – section modulus – strength and stiffness of beam – problems involving bending
      equation only.

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

UNIT IV:
a)    TORSION :                                                                         (10Hrs)
              Introduction- theory of torsion and assumptions - derivation of torsion equation T/
      J = fs/R = Cθ / 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 in weight and strength considerations - problems.




                                               3
b)   SPRINGS :
             Types of springs – laminated and coiled springs - closely coiled helical springs
     subjected to axial load – problem to determine maximum shear stress, deflection,
     stiffness and resilience of closely coiled helical springs only.

UNIT V:
a)   FRICTION :                                                                           (14 Hrs)
             Friction – force of friction – limiting friction – static friction – dynamic friction –
     laws of 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 and crossed belt drives – belt materials – merits and demerits of flat, V belts and
     ropes – velocity ratio of belt drive – effect of belt thickness on velocity ratio – slip of belt
     – velocity ratio of compound belting – length of belt in open and crossed belt drives - no
     derivations – problems – angle of contact – laws of belting – belt connecting parallel and
     perpendicular shafts – ratio of tension in flat, 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 and
     worm 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– chain drive – types - definition - applications


REFERENCE BOOK:
     1.   Strength of materials                  - A S Ramamrutham
     2.   Strength of materials                  - R S Khurmi
     3.   Applied Mechanics                      - R S Khurmi
     4.   Applied Mechanics and strength of materials   - Dr. R.K. Bansal
     5.   Applied Mechanics and strength of materials   - I. B Prasad




                                                4
                          2201     MECHANICS OF MATERIALS
                                    Model Question Paper


Time : 3 Hrs                                                                     Max.Marks : 75

Note : 1. Answer all Questions
       2. Answer any one from Part – A (5 Marks ) and any one from Part – B (10 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 pull of
             20 KN in the direction of its length.Find the changes in length ,breath and
              thickness.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 is found to shrink to a ball of 498.8mm dia.If the Poisson’s ratio of
              the ball is 0.24,find E.

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 75 x 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 ,1m in
              diameter when it is subjected to an internal pressure of 150 N / mm2 .The
               wall thickness is such that the maximum tensile stress in the shell is 2150
               N / mm2 under this 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 the beam.E=200KN/mm2 and I=200 x 106 mm4.
          ii)      A timber beam is freely supported on supports 6m apart.It carries a udl of
              12KN / 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. 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 diameter
               40 mm is to transmit power at a speed of 40 rpm.If the maximum shear
               stress is not to exceed 80N/mm2 . Calculate the power in kW transmitted
               by the shaft.
           ii) Derive expressions for maximum slope and deflection of a simply
               supported beam with a central point load.
                                                5
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 pulley is 900 mm and it runs at 540 rpm.
              Determine the power that can be transmitted at the above speed.Neglect
              the effect of centrifugal tension.
          ii) In a spur gear arrangement,the power transmitted is 3 kN.The driving
              pinion has 30 teeth and 40 mm circular pitch.Calculate the speed in rpm
              for the pinion.If the pressure between the teeth exerted is not to exceed
              600 N.




                                                6
                         2202     MANUFACTURING PROCESSES
                                    III - TERM (Core)


5 Hours/Week                                                                Total Hours : 60 Hrs

MAJOR DIVISIONS:

Unit I         Foundry
Unit II        Forging and Welding
Unit III       Powder metallurgy and Heat Treatment
Unit IV        Lathe work and Theory of metal cutting
Unit V         Metrology, Press working and Non-Conventional machining processes


UNIT I: FOUNDRY                                                                         (13 Hrs)
        Patterns – definition – pattern materials- factors for selecting pattern materials – single
piece solid, split patterns – pattern allowances – core prints – use of core boxes - moulding –
definition – moulding boxes, moulding sand – ingredients - silica – clay – moisture and
miscellaneous materials – properties of moulding sand – sand additives – moulding sand
preparation – mixing – tempering and conditioning –types of moulding – green sand – dry sand –
machine moulding – top and bottom squeezer machines – jolting machines - sand slinger – core
– co2 process 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 - 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 - roll
forging

        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 – welding related processes – oxy-acetylene cutting – arc cutting - hard
facing -bronze welding - soldering and brazing special welding processes – cast iron welding –
thermit welding – solid slate welding, 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.

                                                7
UNIT III
A. POWDER METALLURGY HEAT TREATMENT OF METALS                                             (10Hrs)

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


HEAT TREATMENT

       Heat treatment processes – purpose – procedures – applications of various heat treatment
processes - iron-carbon equilibrium diagram – full annealing - process annealing -stress relief
annealing – 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 – back
geared type – all geared type – tumbler gear mechanism – quick change gear box – apron
mechanism – carriage cross slide – automatic, longitudinal – and cross feed mechanism – tail
stock and its functions - work holding services – 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 – high speed
steel - setellite - carbide – ceramic- single point tool –nomenclature – chip breakers – tool life -
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
pneumatic comparators – profile measurements – optical flat – surface finish measurements –
profilometers.

Press working :

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




                                                 8
Non-Conventional Machining process :

       Ultrasonic machining – chemical machining – electro chemical grinding – electrical
discharge machining – plasma arc machining – laser machining.


REFERENCE:

Elements of workshop Technology Vol I & II by Hajra Chowdry & Bhattacharya
Manufacturing process by Begeman
Workshop Technology Vol I,II &III by Chapman
Workshop Technology by Raghuwanshi
Production Technology by Jain & Gupta
Production Technology By HMT
A Text book of workshop Technology by R.S. Khurmi & J.K.Gupta
Manufacturing Engineering & Technology by Kalpakjian




                                           9
                       2202        MANUFACTURING PROCESSES
                                   Model Question Paper


Time : 3 Hrs                                                                    Max.Marks : 75


Note : 1. Answer all Questions
       2. Answer any one from Part – A (5 Marks ) and any one from Part – B (10 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
ii
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 lathe
          ii) 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.


                                               10
                      2203     FLUID MECHANICS & FLUID POWER
                                    III – TERM (Core)


6Hours / Week                                                       Total Hours – 72 Hours

MAJOR DIVISIONS:
UNIT I         :      Properties of fluids and Hydrostatic forces
UNIT II        :      Flow of fluids and Flow through pipes
UNIT III       :      Impact of jets and Hydraulic turbines
UNIT IV        :      Centrifugal and Reciprocating pumps
UNIT 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 absolute pressure –
problems – Pascal’s law and its applications – pressure measurement – piezometer tube – simple
U-tube manometer – differential U-tube manometer – problems – precautions in using
manometers – mechanical gauges – Bourdon’s tube pressure gauge – diaphragm pressure gauge.
        Hydrostatic forces – definition – total pressure – centre of pressure – total pressure and
centre 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 of a
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 –Venturi
meter – derivation for discharge – orifice meter – differences between Venturi meter and orifice
meter – problems.
        Orifice – types – applications – hydraulic coefficients – determining hydraulics
coefficients – 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-Weisbach
equation 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 the
direction of jet – on a flat plate moving in the direction of jet – on a series of moving plates or
vanes – force exerted and work done by the jet– problems.

                                                11
        Hydraulics turbines – classifications – Pelton wheel – components and working – speed
regulation – work done and efficiency of Pelton wheel – working proportions – problems –
Francis and Kaplan turbines – components and working – draft tube – functions and types –
surge tank – simple surge tank – differences between impulse and reaction turbines.

UNIT IV : CENTRIFUGAL AND RECIPROCATING PUMPS                                           (13 Hrs)

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

        Reciprocating pumps – classifications – working of single acting and double acting
reciprocating pumps – plunger and piston pumps – discharge of a reciprocating pump- theoretical
power 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 control
valves – pressure relief valves – pressure regulation valves – directional control valves – 3/2
DCV, -4/2 DCV, -4/3 DCV, 5/2 DCV, 5/3 DCV- flow control valves – throttle, shuttle and quick
exhaust values – ISO symbols of pneumatic components – pneumatic circuits – direct control of
single acting cylinder – operation of double acting cylinder – operation of double acting cylinder
with metering-in control / metering-out control –use of shuttle valve in pneumatic circuits – use
of 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 hydraulic
fluids – hydraulic accumulators – weighted or gravity, spring loaded, gas operated, bladder type
accumulators – fluid power pumps – external and internal gear, vane and piston pumps – ISO
symbols for hydraulic components – hydraulic circuits using sequence valve – counter balance
valve – hydraulic circuit for – shaping machine, surface grinding or milling machine – hydraulic
jack – hydraulic lift – hydraulic intensifiers – hydraulic press – pneumatic system Vs hydraulic
system.

REFERNCE BOOKS :
1.     Hydraulic Machines                                   -      Jagadishlal
2.     Fluid Mechanic and Hydraulic Machines                -      R.K. Bansal
3.     Hydraulics & Hydraulic Machines                      -      R.S. Khurmi
4.     Hydraulics Hand Book                                 -      R.H. Warring
5.     A Text Book of Hydraulics                            -      R.K. Rajput
6.     Pneumatics & Hydraulics                              -      Harry. L. Stewart
7.     Introduction to Pneumatics                           -      FESTO manual
8.     Fundamentals of Pneumatic Control Engineering        -      FESTO manual
                                               12
                 2203                  FLUID MECHANICS & FLUID POWER
                                       Model Question Paper


Time : 3 Hrs                                                                        Max.Marks : 75


Note : 1. Answer all Questions.
       2. Answer any one from Part – A (5 Marks ) and any one from Part – B (10 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
              immersed in water such that the center of the plate is 3.6 m deep from the
              free surface of water. 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 is connected to the pipe carrying water pressure. The center of the
             pipe is at the level of 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.
iii        ii) A venturimeter of size 300 x 100 mm is fitted to the horizontal pipe.
iv             Mercury the manometer is connected to the venturimeter reads 100 mm.
v              Find the discharge of through the pipe, if co efficient of venturimeter is 0.98
vi
III.   A. i) Derive an expression for the force exerted by the jet on a moving flat plate
          ii) 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 vanes
               moving with a velocity of 10 m/sec. Find (a) force exerted by the jet. (b) Work
               done by 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 remedies
            ii) 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 its
                  working principle.
               ii) A single reciprocating pump has a plunger diameter of 250 mm and a stroke of
                  350 mm .If the speed of the pump is 60 rpm and delivers 16.5 LPs.
                  Find (a) theoretical discharge (b) coefficient of discharge (c) slip and
                   (d) percentage of slip.
                                                  13
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.
vii      ii) Explain the working of an external gear pump with a neat sketch.




                                             14
                      2204                     MACHINE DRAWING
                                       III - TERM (Core)


6 Hours /Week                                                     Total Hours - 72 Hours

MAJOR DIVISIONS :

Unit I     Sectional Views

Unit II    Threaded Fasteners and Machine Elements
Unit III   Limits, Fits, Tolerance and Surface Finish
Unit 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 of form and position –
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 joint
             3. Knuckle joint
             4. Flange coupling

                                             15
       5. Universal coupling
       6. Protected type flange coupling
       7. Plummer block
       8. Swivel bearing
       9. Simple eccentric
       10. Screw jack
       11. Petrol engine connecting rod
       12. Stuffing box
       13. Machine vice
       14. Tail stock


REFERENCES:
 1. A Text book of Machine Design - by R.B. Gupta
 2. Machine Drawing                  - by N.D. Bhatt
 3. Machine Drawing                  - by K.S. Gopala Krishnan
 4. Machine Drawing                  - by P.S. Gill
 5. BIS Engg. Drawing practice for schools and colleges(BIS New Delhi 1989)
 6. Design Data Book                 - PSG Tech




                                          16
                         2205                 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 sheet
             b. First angle projection shall be followed.
             c. Missing Dimensions may be suitably assumed.


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

PART A

               d. What is meant by offset section? What are the reasons for local section?
               e. What are the different types of Nuts? State its application.
               f. What are the different types of Rivet heads? State atleast two application of
                   rivetting.
               g. What is meant by Hole Basis and shaft Basis system?
               h. 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 to full
scale.                                                                           (55)

               i. Top half sectional elevation

               j. plan

               k. Bill of materials




                                                 17
  2206                  MECHANICS OF MATERIALS AND FLUID MECHANICS LAB
                                 III - TERM (Core)

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
percentage 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 of
shear 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 deflection
method – 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 and
FCV – Hydraulic system Vs pneumatic system Hydraulic oil and its properties.


                                                 18
Resources required:
      Pneumatic trainer kit with air compressor
      Hydraulic 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 by constant head method and
variable head method.


9. External mouth piece
       Determine the coefficient of discharge through External mouth piece by variable head
method.and constant head method.

SCHEME OF EXAMINATION

                 Topic                      Marks
Exercise (Anyone from Mechanics of           70
Materials Lab / Fluid Mechanics Lab )
Viva Voce                                       5
                 Total                         75



                                                19
                          2206                    WORKSHOP - I

                FOUNDRY, WELDING ,SMITHY & LATHE WORK
                            III - TERM (Core)
 6 Hours / Week                                    Total Hours: 72 Hrs

I . FOUNDRY EXERCISES

Preparation of sand mould:
      1.Single Piece Pattern
             a) Cube
             b) Flange
             c) Pulley
             d) Gear Wheel
      2.Split Pattern
              a) Straight Pipe
              b) Bend Pipe
              c) 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
             any one of the following furnace.
             a) Oil fired crucible furnace
             b) Pit furnace

II . WELDING EXERCISES
       1.Arc welding
              a) Lap joint (Material : 25mm x 3mm Ms Flat)
              b) Butt joint (Material : 25mm x 6mm Ms Flat)
              c) T- joint (Material : 25mm x 3mm Ms Flat)
              d) Corner joint (Material : 25mm x 3mm Ms Flat)
      2.Gas welding
            a) Lap joint (Material : 25mm x 3mm Ms Flat)
            b) Butt joint (Material : 25mm x 6mm Ms Flat)
            c) Gas cutting - Profile cutting ( Not for Examination )
      3.Soldering and Brazing (Demonstration only)
III . SMITHY EXERCISES
      1.Round rod to hexagonal rod
      2.Round rod to square rod
      3.Round rod to square headed bolt
      4.Round rod to hexagonal headed bolt
      5.Round rod to flat with width 25mm
Material: Dia 16mm x 100mm Length

                                             20
IV . LATHE EXERCISES (Not for examination, Only for Class Exercises)

       1.Plain Turning
viii   2.Step Turning
       3.Step Turning and Chamfering.



LATHE EXERCISE

1. Plain Turning.




                                                             Ø2 2




                                               100mm




2. Step Turning.




                                        21
3. Step Turning & Chamfering.




SCHEME OF EXAMINATION


              Topic             Marks
Foundry                          50
Any one from Welding / Smithy    20
Viva Voce                         5
              Total              75




                                  22
23
24
25

				
DOCUMENT INFO