3341901 file4 th semester assignments n.g.patel polytechnic, isroli-afwa 1

4TH SEMESTER Assignments

N.G.PATEL POLYTECHNIC, ISROLI-AFWA 1

3341901

MANUFACTURING ENGINEERING-II

UNIT 1:- INTRODUCTION AND MECHANICS OF CUTTING

1. Differentiate between forming and generating processes.

2. Explain need, scope and importance of manufacturing processes in industries.

3. Differentiate between orthogonal cutting and oblique cutting.

4. Differentiate between Hot working and Cold working processes.

5. Write short notes on cutting fluid.

6. State safety precaution in machine tools.

7. Explain mechanism of chip formation.

8. Enlist different types of chips; explain any one with neat sketch.

9. Write a advantages and disadvantages of chip breakers.

10. Define following terms:

1. Material removal rate(MRR) 2. Feed 3. Speed 4. Depth of cut

UNIT 2:- BASIC MACHINE TOOLS-I

LATHE MACHINE

1. Give the classification of the lathe.

2. Give the specification of the lathe machine.

3. Write short notes on all geared head stock center lathe.

4. List the taper turning methods and explain any one of them.

5. Explain thread cutting mechanism in lathe machine.

6. Write short notes on (Any two)

a. Tail Stock.

b. Three and Four Jaw Chuck.



7. List different types of Lathe operations and explain any two with neat sketch.

8. Draw the Block diagram of Lathe and Label its parts.

9. Define the terms:

a) Cutting Speed.

b) Feed.

c) Depth of Cut.

d) Machinability.

10. Write work holding device of lathe. Sketch any two of them.

11. Write short note on 3-Jaw and 4-Jaw chuck.

DRILLING MACHINE

1. Write short notes on radial drilling machine.

2. List the different operations performed on drilling machine and explain any one with

sketch.

3. List the different tool holding devices used on drilling machine and explain any one with

sketch.

4. List the different work holding devices used on drilling machine and explain any one with

sketch.

5. Classify drilling machine.

6. State the specifications of drilling machine.

UNIT 3:- BASIC MACHINE TOOLS-II

MILLING MACHINE

1. Give the classification of the Milling machine and explain any one.

2. Give the classification of milling cutters.

3. Enlist different indexing methods used on milling machine. Also explain any one.

4. List the work holding device of milling machine and explain any two.

5. Explain construction and working of Vertical milling machine.

6. Enlist the tool holding device and explain any one.



7. Explain Gang milling and End milling operations.

8. List five principle parts of milling machine and state their functions.

9. Explain Up milling and down milling.

10. Write short note on Universal milling machine.

UNIT 4:- BASIC MACHINE TOOLS-III

SHAPER MACHINE

1. Classify shaper machine. Explain different types of shaper machines.

2. Explain working of shaper machine.

3. Draw neat sketch of shaping machine. List different parts of shaper machine and explain

any two.

4. Explain quick return mechanism in shaper machine.

5. Explain with sketch, how the length of stroke are adjusted in shaper?

6. Explain with sketch, how the position of stroke are adjusted in shaper?

7. List different operations performed on shaper machine and explain any one with sketch.

8. List work holding devices used on shaper machine and sketch any two of them.

9. Write short notes on hydraulic shaper.

PLANNER MACHINE

1. Write short notes on double housing planer.

2. Explain open and cross belt drive for planer.

3. State the difference between shaper and planer.

4. List different operations performed on planer machine and explain any one with sketch.

5. List work holding devices used on planer machine and sketch any two of them.

SLOTTER MACHINE

1. Draw block diagram of slotting machine. Explain parts of slotting machine.

2. Classify slotting machine.



UNIT 5:- CUTTING TOOLS AND TOOL HOLDERS

1. Write a short note on “Tool Geometry”

2. What are the properties of good tool material?

3. Explain relation between cutting speed and Tool life.

4. Draw a three view of single point cutting tool with angles.

5. Discuss in brief following tool materials.

1. High carbon steel

2. HSS

3. Ceramics

4. Cemented carbide

5. Diamond tool

7. Explanation of various types of tool wears with sketches.

8. Write short notes on : alloying elements in tool materials and their effects

9. Write a short note on chip breakers.

10. Explain nomenclature of twist drill.

UNIT 6:- AUTOMATES

1. Difference between capstan and turret lathes.

2. State merits and demerits of capstan and turret lathes over engine lathes.

3. Write a short note on an operation sheet, with examples.

4. List various types of work holding devices used in capstan and turret lathes, and explain

any two of them.

5. Write short notes on single spindle automats.

6. Differentiate between multi spindle automates and special purpose automates.



3341902

THERMAL ENGINEERING-I

UNIT 1:- TWO PHASE SYSTEM

1. Define following terms related to two phase system (a) Critical point (b) Triple point (c) Saturation temperature (d) Super heated steam (e) Sensible heat (f) Latent heat

2. Write short note on combined separating and throttling calorimeter 3. Explain Dryness Fraction of steam and Give the value of Dryness Fraction for saturated

water, Wet steam and Dry and Saturated steam. 4. Represent following process on Mollier chart as Dryness fraction, Constant volume

and Constant pressure process. 5. Steam enters an engine at a pressure of 12 bar with 67° c of super heat. It is exhausted

at a pressure of 0.15 bar absolute and 0.95 dry. Find the drop in the total heat of steam (take Cp of super heated steam Cp= 2 kj/kgk.)

6. Define throttling process of steam, represent throttling process on P-V diagram, T-S diagram and mollier diagram.

7. Calculate enthalpy, sp. volume & entropy to convert 6kg. Of feed water at 20°into steam at pressure of 6 bar absolute for wet steam having dryness fraction 0.8 Cpw=4.187 kJ/kg.k°

UNIT 2:- BOILERS, MOUNTINGS AND ACCESSORIES

1. Define boiler & classify it.

2. Give the specifications of boiler.

3. Define following with respect to boiler performance.

(i) Boiler capacity (ii) Equivalent evaporation (iii) Boiler efficiency (iv) Boiler Horse power

(v) Factor of evaporation

4. Define draft & differentiate F.D. Fan & I.D. Fan.

5. Give comparisons between fire tube & water tube boiler.

6. Give answers of following questions in brief:

What is the capacity of Babcock & Wilcox boiler?

List the uses of boiler.

State the unit of draft.

State the unit of steam generation capacity.

Why parts of the boiler have to be clean?



7. Make heat balance sheet for fire tube boiler for 1 kg of coal input.

8. State the locations & functions of mountings & accessories.

9. Give the difference between boiler mountings & accessories.

10. State the methods of minimizing the heat loss in boiler.

UNIT 3:- STEAM PRIME MOVERS

1. Differentiate between impulse turbine and reaction turbine.

2. Explain the term compounding of steam turbine. State the method of compounding of

steam turbine.

3. Explain velocity compounding and pressure compounding in steam turbine with neat

sketch.

4. State advantages and limitations of velocity compounding and pressure compounding.

5. Derive an expression for the mass of discharge through nozzle.

6. Explain following.

(a) Nozzle efficiency.

(b) Critical pressure ratio of nozzle.

7. A steam of 12 bar and 250 0C initial temperature is expanded in a nozzle upto 2 bar.

Mass flow is 0.21 kg/sec. Find out exit area of nozzle considering isentropic expansion.

8. Steam superheated by 750 0C and 15 bar pressure is expanded through a convergent

divergent nozzle upto 0.7 bar pressure. If flow of steam is 850 kg/hr. Determine

diameter of nozzle at exit.

UNIT 4:- STEAM CONDENSERS AND COOLING TOWERS

1. State the function of the condenser.

2. state the effects of air leakage in condenser.

3. Classify the condensers.

4. Differentiate between Jet condenser & Surface condenser.

5. State the function of Cooling Tower.

6. Define:

(i) Vacuum Efficiency

(ii) Condenser Efficiency

(iii) Corrected Vacuum.



UNIT 5:- AIR COMPRESSORS

1. Explain the working of single stage reciprocating compressor with neat sketch.

2. What is multistage compressor ? Explain why it is used.

3. Derive an expression for minimum work required in a two stage reciprocating

compressor.

4. Compare Reciprocating compressor with Rotary compressors.

5. Explain following:

(a) Positive displacement compressors

(b) Back flow in positive displacement air compressors.

6. Compare Centrifugal and Axial flow air compressors.

7. Derive the expression for minimum work done for two stage reciprocating compressor.

State the assumptions made.

UNIT 6:- HEAT TRANSFER

1. Discuss various modes of heat transfer.

2. Explain thermal conductivity and heat transfer co-efficient.

3. Discuss the boundary layer concept.

4. Differentiate between free and forced convection.

5. Explain the concept of absorptivity, reflectivity and transmissivity.

6. Explain over all heat transfer coefficient.

7. Classify heat exchanger & explain shell & tube type heat exchanger.



3341903

THEORY OF MACHINES

UNIT 1:- INTRODUCTION

1. Define following:

a) Theory of Machines b) Kinematics c) Dynamics d) Kinetics

e) Statics f) Link g) Kinematic Chain

h) Kinematic Pair i) Machine j) Mechanism

k) Structure l) Lower Pair m) Higher Pair n) Inversion

2. What is kinematic pair? Classify various types of kinematic pairs. Explain them with neat

sketches.

3. Explain completely constrained motion and successfully constrained motion with

suitable examples.

4. Define inversion of a mechanism. List the inversion of single slider crack mechanism.

Explain any one inversion of a slider crank chain mechanism.

5. Sketch and explain the crank and slotted lever type quick return mechanism.

6. Explain Whitworth type quick return motion mechanism with neat sketch.

7. Sketch and explain any two Inversion of double slider crank chain

8. Define mechanism and give the difference between machine and mechanism.

UNIT 2:- VELOCITY AND ACCELERATION DIAGRAM

1. Derive relation between linear velocity and angular velocity and linear acceleration and

angular acceleration.

2. Explain Slider Crank Mechanism and Draw the velocity and acceleration diagram for the

same based on relative velocity method.

3. Define the following Terms: 1) Linear velocity 2) Linear Acceleration

3) Angular velocity 4) Angular acceleration

5) Relation between Angular velocity and rotation speed.



4. Explain with neat sketch Klein’s construction for velocity and acceleration of the parts of

Reciprocating engine.

UNIT 3:- CAM AND CAM PROFILE

1. List types of cams and followers and explain valve mechanism of IC engine.

2. List types of follower’s motion and explain any one.

3. Explain various types of cams and Followers with neat sketch.

4. Define and sketch the following term: 1) Came Profile 2) Base circle 3)Pitch Point

4) Prime circle 5) Pitch curve 6) Pitch circle

7) Pressure Angle

UNIT 4:- FRICTION

1. Discuss briefly the various types of friction experienced by a body.

2. Define static friction. State the laws of static friction.

3. Give the classification of friction and define any two.

4. Derive an expression for frictional torque lost in flat pivots assuming uniform wear

condition. Explain the effect of this assumption on the calculation

5. List use of thrust bearing and derive the expression of friction torque for a conical pivot

bearing

6. Derive an expression for frictional torque and power lost in friction for flat collar bearing

assuming conditions of uniform pressure and uniform wear.

7. State the function of clutch. By beat sketch explain the single plate clutch.

8. List types of clutches and explain construction and working of a single plate clutch.

9. Explain the working of a multi plate clutch with neat sketch.

10. Explain hydrodynamic lubrication principle in journal bearing.

11. Define dynamometer. List various types of dynamometers.

12. Explain the principle, working and use of rope brake & prony brake dynamometer with a

sketch.



UNIT 5:- POWER TRANSMISSION

1. Why power transmission system is required? Under which conditions belt drive is

preferred?

2. Why V-belt is preferred to flat belt in power transmission? State reasons.

3. Define slip and state the effect of slip. State the methods of reducing slip.

4. Give the classification of mechanical power transmission and state the advantages of belt

drive.

5. Describe with diagrams-(1) Open belt drive. (2) Crossed belt drive. (3) Compound belt

drive.

6. Derive the tension ratio for a flat belt drive Where, T1 = Tension on tight side T2 =

Tension on slack side μ = Co-efficient of friction, θ =Angle of lap

7. Derive the tension ratio for a flat belt drive with usual notations.

8. What is centrifugal tension? Derive its relationship with mass per unit length of belt and

the velocity of the belt. (Tc=mv²)

9. Define the following terms: (1) Slip (2) Velocity ratio (3) Angle of lap

(4) Train value (5) Idler gear (6) Initial tension

10. Define gear train, state various types of gear train and explain any one gear train with

neat sketch.

11. Define Train value and explain the working of Epicyclical Gear Train with neat sketch.

UNIT 6:- FLYWHEEL AND GOVERNOR

1. State functions of governor and differentiate between flywheel and governor.

2. Explain the function of the flywheel. State the difference between flywheel and governor.

3. Explain the term “fluctuation of Energy” and “fluctuation of speed” as applied to the

flywheel.

4. State the different types of governors. Explain Hartnell governor with sketch.

5. State the uses of turning moment diagram

6. State the functions and use of flywheel

7. Differentiate between (1)Governor and flywheel

(2) Gravity controlled governor and Spring control governor

8. Explain with neat sketch the working of proell Governor.



9. Draw the turning moment diagram for: 1. Steam Engine 2. I.C. Engine.

UNIT 7:- BALANCING AND VIBRATIONS

1. Why balancing of rotating and reciprocating parts of the engine is necessary?

2. Explain the balancing of several masses rotating in the same plane. Describe any one

procedure of finding the magnitude and position of balancing mass.

3. Prove that if a body is in dynamic balance, it will be in static balance, but the reverse is

not true.

4. Explain static balancing and dynamic balancing.

5. Differentiate between (1) Static balancing and dynamic balancing

(2) Primary disturbing force and secondary disturbing force

6. Explain the balancing of several masses revolving in the same plane by analytical

method.

7. Classify the various types of vibrations. State the causes of vibration and methods of

reducing it

8. State the causes of vibrations and suggest the remedies for the causes.

9. Define in short free vibration, force vibration and damped vibration.

10. Define the following term:

Period frequency cycle Amplitude

Resonance free vibration damped vibration



3341904

CAD

UNIT 1:- FUNDAMENTALS OF CAD.

1. Define the term CAD. Write need of CAD. 2. Explain functional areas of CAD. 3. List Advantages of CAD. 4. State and explain design steps in CAD. 5. Write the application of CAD. 6. List the design steps in CAD. Also state reasons to implement CAD system. 7. Explain Co-ordinate system. 8. Write short notes on 2D transformation in CAD. 9. Solve the following problems:

1. A lien is define by its end points (0, 0) and (2,3) in a two dimensional graphics system. Express the line in matrix notation and perform the following transformation on this line:

(a) Scale the line by factor of 2.0. (b) Scale the original line by a factor 3.0 in x direction and 2.0 in the y direction. (c) Translate the original line by 2.0 units in x direction and 2.0 units in y

direction. (d) Rotate the original line by 45 about the origin. (e) Plot the original line and each of the four transformations on a piece of

paper. 2. A triangle is define in a two dimensional ICG system by its vertices (0, 2), (0, 3) and

(1,2). Perform the following transformation on this triangle: (a) Translate the triangle by 2.0 units in x direction and 2.0 units in y direction. (b) Scale the original triangle by factor of 1.5.

(c) Scale the original triangle by a factor 1.5 in x direction and 3.0 in the y direction.

(d) Show the sequence of transformations on a piece of paper. 3. A lien is define by its end points (1, 2) and (6,4) in a two dimensional graphics system.

Express this in matrix notation and perform the following transformation on this line: (a) Rotate the original line by 90 about the origin. (b) Scale the line by factor of 1/2. (c) Show the sequence of transformations on a piece of paper.

4. A line in a two dimensional space has end points defined by (1,1) and (1,3). It is desire to move this line by series of transformation so that it s end points will be at (0,1) and (0,5).

(a) Describe the sequence of transformation required to accomplish the moment of the line as specified.



(b) For each transformation in the sequence, write the transformation matrix. 5. A point in a two dimensions is located at (3,4). It is desire to relocate the point by

means of rotation and scaling transformation only (no translation) to a new position defined by (0,8).

(a) Describe the sequence of transformation required to accomplish the moment of the line as specified.

(b) Write the transformation matrix for each transformation in the sequence.

UNIT 2:- CAD HARDWARE’S.

1. Define the term CAD work station. Write concept and classification of CAD work station.

2. Enlist types of input devices with their applications.

3. Enlist types of output devices with their applications.

4. Write any two input device with its configuration and applications.

5. Explain CAD workstation with block diagram.

6. Explain 3D printer with configurations and applications.

7. List the importance of configuration of CAD workstation.

UNIT 3:- GEOMETRIC MODELLING.

1. Give the difference between 2D and 3D models.

2. List the types of geometric modeling and explain any one.

3. List the types of solid modeling and explain any one.

4. Differentiate solid modeling and wireframe modeling.

5. Discuss importance of solid modeling.

6. Differentiate parametric modeling and solid modeling.

7. Differentiate solid modeling and surface modeling.

UNIT 4:- 3D MODELING USING AUTOCAD.

1. Explain with examples following AutoCAD commands. a) REVSURF b) TABSURF c) RULESURF d) SUBSTRACT e) UCS f) UNION g) 3D ORBIT h) WEDGE i) FILLET j) ARRAY k) EXTRUDE



2. Explain various constraints used in Pro/E software. 3. What is feature base design? Explain with suitable example. 4. List various solid modeling software used in CAD and explain features of any one in

detail. 5. Explain 3D primitives. Give its types. 6. Write complete procedure to draw 3D model for a given components.

7. Figure shows a solid model. List steps with command procedure (along with sketch,

name of command, UCS position and option for each step) to generate a 3-D model in AUTOCAD.

UNIT 5:- 3D PARAMETRIC MODELING

1. What is parametric design? Explain with suitable example.

2. Differentiate between Parametric Modeling and Non Parametric modelling. 3. Explain 3D working planes with a neat sketch. 4. Construct 3D parametric modeling for the Industrial Components shown below.

a) Snap Headed Rivet

b) Knuckle Pin

c) Headed Bush

d) Flange of the Coupling with shaft



3341905 METROLOGY AND INSTRUMENTATION

UNIT 1:- LINEAR AND ANGULAR MEASUREMENT.

1. Classify the slip gauges and build up following reading using M-112 normal slip gauge set.

(1.) 26.3695 mm (2.) 89.8905 mm

2. Sketch the following Readings on vernier caliper (Main scale division = 1mm, No. of

division on vernier scale = 50.) (1.) 15.08 (2.) 21.46 (3.) 29.84

3. Sketch the following readings on micrometer (1.) 6.87 (2.) 11.15 (3.) 18.27.

4. Explain working principle and construction of Outside micrometer.

5. Explain working principle and construction of Vernier caliper.

6. Explain wringing process. List any six instrument use for linear measurement.

7. State types of dial indicator and explain it.

8. Explain mechanical comparator with neat sketch.

9. List application of dial indicator with sketch.

10. State principles of sine bar and explain its use with example.

11. Write Short Note:

(1) Angle gauges (2) Spirit level

12. Sketch the following Reading on Bevel protector. (1) 75° 15’ (2) 89° 45’

13. Sketch mechanical bevel protector and state the name of its parts.

14. Explain concept of optical bevel protector.

15. How will you measure slope of lathe centre or taper of drill with the help of sine bar?

16. Explain application of sine centre and sine table.

17. Explain with neat sketch working principle of autocollimator, angle dekkar and

clinometers.

18. Find out angle gauge block required to set an angle of (1) 23° 49’ 24” (2) 48° 40’54”

Angle block set available.

Degree 1,3,9,27,41 = 5

Minutes 1, 3,9,27 = 4

UNIT 2:- MEASURMENT OF GEOMETRICAL TOLERANCES.

1. Explain construction and working of dial indicator with neat sketch.

2. List the methods for measuring flatness & explain any two of them.

3. State diff. methods of testing of roundness and explain any one.

4. Explain wedge method for straight edge.

5. Explain v-block & dial indicator method of testing roundness.



UNIT 3:- MEASUREMENT OF SURFACE ROUGHNESS.

1. Define comparator. List various types of comparator. Explain the working of pneumatic

comparator with neat sketch.

2. Explain working principle of Tomlinson surface method with neat sketch.

3. Explain primary & secondary texture.

4. Explain working principle of profilograph with neat sketch.

5. Explain ‘M’ & ‘E’ system of surface roughness system.

6. Explain working principle of stylus instrument.

7. Define 1.refrence line 2.sampling length 3.Mean line 4.Lay 5.CLA value 6.R.M.S value

UNIT 4:- GEAR MEASUREMENT 1. Explain with neat sketch the working of Parkinson’s gear tester.

2. Write a short note on Gear tooth vernier caliper.

3. Describe the Chordal thickness method for spur gear and state its limitations.

4. Comparison between Chordal thickness and constant chord method.

5. Write a short note on David brown gear tooth form testing.

6. Define following terms.

a) Diametral pitch

b) Module

c) Circular pitch

d) Addendum

e) Pitch circle diameter

7. State the method of measurement of circular pitch and explain any one.

8. Explain line of action and pressure angle of spur gear with sketch.

9. Explain the method of measuring eccentricity of gear.

10. Draw neat sketch of gear tooth and show different terminology on it.

UNIT 5:- THREAD MEASUREMENT

1. Draw neat sketch of screw thread & List its main elements of measurement.

2. Explain different types of errors in screw thread.

3. List various methods of measuring effective diameter of screw thread. Explain three

wire method.

4. Write Short Note:

(1) Best wire size (2) Limitation of Thread cast

5. List various methods of thread cast. Explain any one with advantages & disadvantages.

6. Give name of instruments used for measuring elements of internal thread.



UNIT 6:- LIMITS GAUGES

1. What is limit gauge? Discuss the purpose of ‘go’ & ‘no go’ members of limit gauge.

2. Define: 1.Fundamental deviation 2.Tailor’s principle 3.Gauging

4.Allowances 5.Limits 6.Fits

3. Name diff. limit gauge & explain any one with neat sketch.

4. Differentiate 1.Plug gauge-Ring gauge 2.Work tolerance-Gauge tolerance

3.Measurment-Gauging

5. Classify limit gauge & list advantages and limitation of the same

UNIT 7:- NON DESTRUCTIVE TESTING.

1. Explain radiography test with figure.

2. Explain ultrasonic test with figure.

3. Explain magnetic particle test with figure.

4. Explain dye penetrate test with figure.

UNIT 8:- TRANSDUCER

1. Define “Transducer”.Classify it with examples.

2. State the difference between an active and passive transducer.

3. Draw & Explain the block diagram of generalized measuring system. Explain its different

stages with example.

4. Explain the working principle of

5. i) Piezo electric transducer ii) LVDT

6. iii) Strain gauge transducer iv) Resistance type transducer

7. Explain the working principle of Capacitance type transducer with sketch & state its

advantages and disadvantages.

8. Explain the working principle of inductance type transducer with sketch & state its

advantages and disadvantages.

9. State advantages and disadvantages of mechanical electrical transducers.

10. Explain functions of primary and secondary transducers.

UNIT 9:- TEMPERATURE PRESSURE AND FLOW MEASUREMENT

1. State the principles on which different temperature measuring devices working.

2. Explain the principle and working of bi metallic thermometer and state its applications.

3. Draw the circuit diagram of resistance thermometer explain its principle, working,

advantages& disadvantages

4. Differentiate between resistance thermometer and thermistor.



5. State principle, working, advantages& disadvantages of thermocouple.

6. Differentiate between resistance thermometer and thermocouple.

7. Draw the neat figure of Radiation pyrometer explain its principle, applications,

advantages& disadvantages.

8. Draw the neat figure of optical pyrometer explain its principle, applications,

advantages& disadvantages.

9. Explain cistern manometer with neat sketch.

10. State and explain working principle of pressure capsules.

11. .List the various sensing element used in pressure gauge. Describe ‘Bourdon tube

12. Write short note on

(a) Inclined manometer

(b) Dead weight pressure gauge

(c) Resistance type or strain gauge transducer.

(d) LVDT

13. Name different types of elastic gauges used for pressure measurement and explain

anyone.

14. Describe ‘Rota meter’ with Neat sketch. State its advantage & disadvantages.

15. Give the detail classification of flow measuring device.

16. Write short note on

(a) Rotating lobe meter. (b) Venturimeter.

(c) Pitot tube. (d) Rotating Impeller meter.

17. Explain the construction and working principle of “Hot Wire Anemometer”.

18. Explain the difference between volumetric flow meter and rate of flow meter.Give three

examples



3341906 PLANT MAINTENANCE AND SAFETY

UNIT 1:- FUNDAMENTAL OF MAINTANANCE ENGINEERING.

1. Define maintenance & give primary and secondary function of maintenance Department.

2. Define maintenance cost & give factors affecting maintenance cost. 3. List methods for replacement and explain annual cost method. 4. Explain factors affecting for replacement instead of maintenance & explain mapi

method for replacement.

UNIT 2:- TRIBOLOGY

1. Define wear & explain its types. How it can be reduced? 2. List effect of wear and explain any three. 3. Define friction & its types. List effect of friction. 4. List wears reduction methods & explain any three. 5. Explain effect of misalignment on performance of machine. 6. Give types of bearing with their application.

UNIT 3:- CORROSION AND ITS PREVENTION

1. Define surface corrosion & explain its principle with neat sketch. 2. List factors affecting corrosion & explain five. 3. List types of corrosion & explain pitting, stress & erosion corrosion. 4. Give basic corrosion prevention method and explain two. 5. Give secondary methods for corrosion prevention & explain anodic and cathodic protection.

UNIT 4:- FAULT TRACING

1. Define fault tracing and state fault tracing activities. 2. What is decision tree? Give steps involved in preparing decision tree. 3. Define planning and scheduling of maintenance activities. State need for planning. 4. Prepare decision tree for:

o Centrifugal pump does not deliver water. o Low steam pressure in boiler. o Lathe chuck stop revolving. o Scooter engine does not start.



UNIT 5:- PERIODIC AND PREVENTIVE MAINTENANCE

1. Define periodic inspection and state the factors to be considered in periodic inspection. 2. Explain the procedure of periodic inspection. 3. Enlist types of faults in machines. 4. Define degreasing. Explain different methods of degreasing and cleaning. 5. Explain repair complexity and state its uses. 6. Explain the overhauling of following component:

a) Tail stock of lathe. b) Ball & roller bearing. c) Gear pump.

7. State the reasons for belt slipping and explain the method of adjusting the belt tension. 8. List at least ten factors for maintaining a compressor. 9. State steps involved in dismantling sub-assemblies. 10. Give difference between breakdown maintenance and preventive maintenance. 11. Give difference between corrective maintenance and preventive maintenance. 12. List at least five forms used in preventive maintenance, state any one. 13. Explain VEIN Analysis. 14. Define preventive maintenance. List its advantages. 15. Explain the objective of preventive maintenance. 16. What is repair complexity? Define various stage of repair cycle.

UNIT 6:- INDUSTRIAL SAFETY

1. Define an industrial accident. 2. List the common causes of an accident in industry. 3. Classification types of accidents & explain anyone. 4. List and explain various types of hazards. 5. Explain in brief the safety colors code. 6. Explain fire extinguishing medium and also explain “A” B”C” fire. 7. Explain in short about boiler inspection.

UNIT 7:- RECOVERY, RECONDITIONING AND RETROFITTING

1. State advantages of reconditioning. 2. Write a process of reconditioning. 3. State the need of retrofitting. 4. State the application of retrofitting. 5. Define recovery. List recovery methods & explain welding & surfacing with fig. 6. Explain recovery method for shaft by metal spraying with its advantages &

disadvantages 7. Explain factors affecting recovery methods.



8. Explain with neat sketch the working principle of chromium plating. 9. Explain with neat sketch recovery methods for teeth of large gear and hole with worn

out threads.

UNIT 8:- INSTALLATION, ERECTION & COMMISSIONING OF EQUIPMENTS

1. Define foundation. State the effects of foundation. 2. List the criteria for design of foundation. 3. Differentiate between boiler foundation and engine foundation. 4. Write short notes: a) Types of foundation bolts.

b) Foundation material & Concrete mixture.

5. Define Erection and explain the procedure of equipment erection. 6. List the erection equipments. 7. Explain the method of isolation of vibration. 8. Write short notes on “Grouting”. 9. Define alignment and state the tools used for machine tool alignment. 10. Describe acceptance test of machine tool. 11. Explain the procedure of acceptance test on lathe machine.

Documents

3341901 file4 th semester assignments n.g.patel polytechnic, isroli-afwa 1