r.c.technical institute,sola,ahmedabad mechanical ...€¦ · explain in brief interchangeability...

R.C.Technical Institute,sola,Ahmedabad

Mechanical Engineering Department

Subject : Plant maintenance and safety (3341906)

Topic covered: (1)Fundamentals of maintenance engineering(2)Periodic

and preventive maintenance

Assignment 1

1. Define Maintenance engg. And describe functions of maintenance engg.

2. Explain "MAPI" method for replacement.

3. Write short on breakdown maintenance.

4. List the Primary & secondary functions of maintenance department

5. Differentiate between Capital Replacement &Schedule maintenance.

6. Explain the need of maintenance in a Production industry

7. Define the term Service life of equipment & how the service life of

equipment can be increased

8. List the various type of maintenance and state the responsibilities of

Maintenance department

9. Define the term “maintenance cost” and state the factors affecting the

maintenance cost.

10. Define “Maintenance Engineering.” State at least six aims of

Maintenance Engineering.

11. Explain maintenance of diesel generator sets.

12. Describe need and advantages of preventive maintenance.

13. Write short on repair complexity and its uses.

14. Define Preventive Maintenance & list the steps involve in Preventive

maintenance programme

15. Define repair cycle. State the stages involved in repair cycle under

preventive maintenance.

16. List the instruments used in alignment test. Describe the acceptance test

on Lathe Machine.

17. Define scheduling of maintenance activities and list the factors to be

considered when planning maintenance activities.

18. Describe the procedure of periodic inspection.

19. Explain VEIN analysis.




Topic covered : (1)Wear and corrosion and their prevention(2)Fault tracing

Assignment 2

1. Name wear reduction methods and explain any three of them.

2. Explain basic methods for corrosion prevention.

3. List various type of corrosion in machine components, with one example

of each

4. List various lubrication procedures with examples.

5. Explain the working principle of Metal spraying with neat sketch.

6. Write the advantages & limitations of metal spraying.

7. Define fault tracing and state activities of fault tracing.

8. State the different type of Wear & Explain the effect of each one on the

performance of machine part.

9. State seven cause of Mechanical wear

10. List the factors which promotes corrosion

11. Write short notes on protective coating on machine parts.

12. Define wear and explain following wear giving at least one example

Mechanical wear (ii) Molecular wear (iii) Corrosive wear.

13. Define corrosion and list its type . Also explain the principal of catholic

protection

14. State the methods for reducing wear and explain any one method.

15. Define “Corrosion”List the methods of corrosion prevention. Explain any

one of them

16. State the methods for reducing wear and explain any one method.

17. Define “Corrosion”List the methods of corrosion prevention. Explain any

one of them

18. Trace out the fault and make decision tree for low steam pressure in the

boiler.

19. What is fault tracing? List the activities in fault tracing.

20. Draw decision tree to trace fault when Milling machine stopped working.

21. Prepare a decision tree to locate fault when a centrifugal pump does not

deliver water.




Topic covered : (1)Industrial safety(2)Recovery,reconditioning and

retrofitting(3)Installltion ,erection and comissioning of equipments

Assignment 3 1. Describe causes of fire and write about various fire fighting methods.

2. Explain safety precautions for lathe machine and electric arc welding process.

3. Define accident and state the causes of accident . Also state the types accidents.

4. State causes of fire and explain in brief the safety color code.

5. List recovery methods and explain any two recovery methods.

6. Explain recovery methods for (i) worn-out key joint(ii)worn-out shaft

7. Write application of retrofitting. Explain any one in brief.

8. Explain factors affecting the choice of recovering methods.

9. Explain need of condition monitoring.

10. Define reconditioning of machine. State six advantages of reconditioning.

11. Describe with neat sketch the methods of recovering of a hole with worn-out

threads.

12. List five equipments used in conditioning monitoring . Explain any one with

figure.

13. Define the term Recovery & explain the recovery method broken tooth of large

gear.

14. Explain the electrolytic bonding method of recovery with a neat sketch and also

state its advantages.

15. Explain briefly the recovery methods for cracked pipe

16. Explain the reconditioning and retrofitting of machine tools.

17. Define condition monitoring and list the application of conditioning monitoring

18. Prepare an accident report of fire in large sale industry

19. Define Industrial Accident & state direct &indirect losses due to accidents

20. Why boiler inspection is necessary? Explain.

21. Give advantages of reconditioning

22. State common causes of fire in an industry.

23. Explain the selection of appropriate Recovery method

24. Explain Grouting and Erection in detail.

25. Explain the procedure of installing the Equipment.

26. Define the foundation and list the foundation bolts with its figure.

27. Define the term “Erection” and list the equipment used in erection work.

28. Write short notes (1)Industrial safety rules(2)Foundation materials.

R.C.Technical Institute –Sola, Ahmedabad

Mechanical Department

Manufacturing Engineering-II

Assignment -01

Sr No.

Question

1 State important of metal removal processes.

2 Explain Need & importance of manufacturing processes in industries.

3 Explain Needs of Knowledge and skill require for shop floor supervisor.

4 Differentiate between forming and generating processes.

5 Differentiate between orthogonal and oblique cutting.

6 List different types of lathes operation and explain any one.

7 Give the types of Lathe machine. List the specification of lathe machine.

8 Give the specification of a lathe machine.

9 What is MRR? Explain the factors on which it depends.

10 Explain radial drilling machine with neat sketch.

11 Name different methods of indexing. Explain direct indexing.

12 Give classification of milling cutters.

13 Explain up milling and down milling.

14 Explain with neat sketch 1. Face milling 2 End milling.

15 Draw a block diagram of knee type milling machine and label its main parts.




Assignment -02

Sr

No. Question

1 Explain mechanism of cutting process.

2 Explain different type of chips with neat sketch.

3 Enlist different types of chips. Explain continuous chip.

4 Write short note: chip breaker.

5 Explain: cutting speed, feed and depth of cut.

6 Classify and Define basic machine tools.

7 List different drilling machine and explain any one with sketch.

8 Explain movements of cutting tool and job during cutting operation on lathe and

shaper machine.

9 Explain knurling operation performed on lathe machine.

10 Enlist drilling machine operations and Explain counter boring.

11 Describe taper turning by swivelling the compound rest.

12 Explain Gang milling & End milling operation.

13 Explain Metal removal rate during milling operation..

14 Give the function of Dividing Head

15 Enlist the different types of milling cutters.

16 List the different milling operation.




Assignment -03

Sr No. Question

1 Give the name of important types of chips. Describe the circumstances under which

each type of chip is formed.

2 Explain Influence of cutting variables on surface finish, tool life, economy, and

mass production.

3 State the Need for using Cutting Fluids, and give the selection criteria for cutting

fluids.

4 State the advantages and disadvantages of discontinuous chip.

5 Explain Merchant’s Circle diagram for cutting force

6 Explain the taper turning operation by tail stock off set method.

7 What are the Steady and Follower rest? Why are they used?

8 Explain working of half nut on lathe.

9 Draw a line sketch of lathe machine and label the various parts.

10 List the work holders used on Drilling machine.

11 Give the application of following.

(a) Collet chuck (b) three jaw chuck (c) four jaw chuck (d) face plate

12 List methods of obtaining various lathe spindle speeds. Explain any one.

13 Explain direct indexing method.

14 State the function of “Knee” and “Arbor” of a milling machine.

15 List the work holders used on Milling machine

16 Explain angular milling with neat sketch.

17 Explain plain Universal milling machine.

R C Technical Institute, Ahmedabad.


CAD

Assignment –I (Unit-I)

1. Define CAD and list any five main application of CAD.

2. Explain following term in brief (1)RAM (2)USB (3)ROM (4)HTML (5)CPU (6)DVD

3. Enlist types of coordinate system. Explain any one in brief.

4. Explain 2D scaling geometrical transformation with suitable example.

5. Write short note on 2D transformation.

6. Using suitable illustration, explain 2D rotation transformation.

7. Scale the line AB 2 units in x-axis and 2 units in y-axis. The co-ordinates of point A is (2, 2)

and B is (3,5). After scaling translate the scaled line in (-2) units in x-axis and (-3) units in y-

axis. Show it on a graph.

Assignment –II (Unit-II & III)

8. Enlist six input devices with their applications.

9. List the various output devices for graphics and state their functions.

10. Write short note on 3D printer.

11. Differentiate between wire frame surface and solid modelling.

12. Differentiate between 2D and 3D model

13. Explain parametric, non parametric and feature based modelling.

14. Write a short note on constructive solid-geometric method of modelling.

Assignment –III (Unit-IV & V)

15. Explain the following CAD 3D primitives and its parameter in brief (1)BOX (2)CUBE

(3)CYLINDER (4) CONE.

16. Explain following 3D modifying commands in AutoCAD with suitable example. (a)3D

MIRROR (b) 3D ROTATE (c) UNION.

17. Explain following surface modelling commands (a) EDGESURF, (b)REVSURF,

(c)TABSURF, (d)RULESURF.

18. Enlist types of parametric modelling CAD software. Write features of any one.

19. Write the step to prepare AutoCAD 3D model of fig.-1 and 2. Specify name of command,

option/s, position of UCS and value for each step.

Figure: 1 Figure: 2

MI ASSIGNMENT Page 1

R.C.TECHNICAL INSTITUTE, SOLA, AHMEDABAD

SUB: METROLOGY & INSTRUMENTATION (341902)

ASSIGNMENT NO.1 (chapter 1,2,3)

1. Explain line standard. With the help of neat sketch explain imperial standard yard.

2. Differentiate between the following:

1) Line & end standard giving suitable examples.

2) Accuracy & Precision

3. Explain the functions of inspection

4. Explain in brief interchangeability & selective assembly.

5. With the help of neat sketch, explain the working principle of outside micrometer &

show 26.65mm on it.

6. Write a short note on optical bevel protractor.

7. Draw the labeled diagram of vernier caliper.

8. Explain the working of sine bar with diagram.

9. Explain the working of dial indicator with diagram.

10. Explain with diagram roundness measurement.

11. Describe the working principle of Tomlinson surface meter.

12. Explain the working principle of profilograph with neat sketch.

13. Define: 1)CLA value 2) RMS value 3)roughness 4) waviness.

14. List the methods of measuring straightness & flatness. Explain any one of each.




ASSIGNMENT NO. 2 (chapter 4,5)

1) Explain principle & working of gear tooth vernier caliper.

2) Explain three wire method for measurement of effective diameter of thread.

3) Explain with neat sketch Parkinson’s gear tester method. What are the limitations of this

method?

4) Explain the use of limit gauges in screw thread method.

5) Explain the advantages and limitations of screw thread gauge.

6) Differentiate between hole base & shaft base system.

7) Name different limit gauges, state their applications.

8) What are GO and NOT GO members of limit gauges? Sketch a plug gauge and explain

them.

9) Mention the methods of internal thread measurement and explain any one.

10) What is limit gauge ? Explain any one limit gauge with sketch.

11) Classify limit gauges.

12) Write short note on work tolerance and gauge tolerance.

13) Classify gauges.




ASSIGNMENT NO. 3(chapter 6, 7)

1) List the various NDT methods and explain any one in brief.

2) Explain the purpose of NDT.

3) With neat sketch explain dye penetrant test.

4) What is magna flux test? Explain its principle & procedure.

5) Explain any one transducer in brief.

6) Define active & passive transducers.

7) Explain working principle of piezo-electric transducers.

8) Explain the working principle of thermometer with neat figure.

9) Explain the working principle of radiation pyrometer with neat figure.

10) Explain LVDT type pressure transducer.

11) Explain the working of bourdon tube pressure gauge with neat sketch.

12) Explain with neat figure Rotameter.

13) Why rotameter is called variable area flow meter?

14) Classify flow meters.

15) Explain pitot tube as flow meter.

Thermal Engg-1

ASSIGNMENT NO.1

Answer the following questions.

1. Explain Tripple point and Critical point of H2O.

2. Define 1) degree of superheat 2) sub cooled liquid. 3) dryness fraction of steam. 4) sensible heat

5) latent heat 6) two phase system 7) enthalpy 8) entropy 9) specific volume 10) wet steam.

3. Explain the process of generating wet steam, dry steam and superheated steam with T-s

diagram.

4. What is throttling? Draw P-v ,h-s , T-s diagram of throttling.

5. Draw mollier chart and show isentropic process and throttling process on it.

6. Which are the different methods to measure the dryness fraction of steam? Explain throttling

calorimeter and separating calorimeter with neat sketch.

7. 1 kg of steam is heated from 10 bar ab. Pressure and 0.8 dryness fraction to superheated with

50˚CDegree of superheat at constant pressure. Find out change in enthalpy, entropy and change

in volume using steam table and equations.

8. 1 kg of steam initially at 5 bar absolute pressure and temperature 200ͦ̊ C is isentropically

expanded up to wet steam of 0.84 dryness fraction. Find change of enthalpy and final pressure

with the help of mollier Diagram only.

9. Compare jet condenser with surface condenser. state the types of cooling tower and explain

induced draught cooling tower.

10. Define condenser efficiency and vacuum efficiency for steam condenser.

ASSIGNMENT-2

1. Explain Babcock Wilcox boiler with neat sketch.

2. List the mountings and accessories of boiler with their function and locations.

3. Explain water level indicator with neat sketch.

4. Differentiate between fire tube boiler and water tube boiler.

5. Draw Cochran boiler with neat sketch.

6. Explain bourden tube pressure gauge with neat sketch.

7. State the difference between induced draught and forced draught in boiler.

8. Explain heat balance sheet of boiler.

9. Give the classification of boiler.

10. During trial on boiler following data has been recorded) steam produced 2500kg/hr. (ii) coal

used 250 kg/hr.(iii) Feed water temperature 40˚C (iv) quality of steam dry and

saturated.(v)calorific value of coal 30000KJ/kg.(vi) pressure of steam boiler 12 bar. Find (i)Actual

evaporation.(ii) Equivalent evaporation (iii) Thermal efficiency of Boiler.

11. Explain air preheater and air preheater with sketch.

12. Write in brief Indian Boiler Act.

13. State the advantages of economizer in steam power plant.

14. Explain various mode of heat transfer with example.

15. Define (i) Absorptivity (ii)Overall heat transfer coefficient (iii) Blake body. (iv) Emissive

power(v)transmitivity (vi) Reflectivity (vii) Emissivity.(viii) Thermal conductivity.

16. List seven thermal insulating materials with their application.

17. Classify the types of heat exchanger with brief introduction.

18. State basic equation of Newton’s law of convection, Fourier’s law of conduction, Stefan

Boltzman law of heat transfer.

19. Explain LMTD of heat exchanger. and regenerative type heat exchanger.

20. A concrete wall of house is 50 cm thick and a surface area of 10 m × 5 m. The inside temperature

of wall is 30˚C and outside temperature is 10˚C.The thermal conductivity of concrete is 0.8

W/m˚K.Calculate the heat loss through the wall.

ASSIGNMENT-3

1. State the function of condenser.Exploain working of surface condenser with sketch.

2. Explain jet condenser and state its limitations.

3. State the purpose of cooling tower, type of cooling towers and explain induced draft cooling

tower with sketch.

4. Differentiate between impulse turbine and reaction turbine.

5. Why compounding in steam turbine is necessary ? state three types of compounding and

explain any one with sketch.

6. Write advantages and disadvantages of multi stage compression and intercooling.

7. Derive the expression for condition of maximum efficiency in case of two stage reciprocating

compressor.

8. Steam enters nozzle with a velocity of 300m/s with pressure of 3.5 bar with dryness fraction

0.96 and expands isentropically to 2 bar, using mollier chart find out change in enthalpy of

steam and exit velocity of steam.

9. Apply steady flow energy equation to nozzle and derive equation of extreme velocity.

10. Find out minimum work required to compress 2 kg of air in two stages from 10N/cm 2 and 30ͦ̊ C

to 160N/cm 2 with perfect intercooling take R=0.287 KJ/kg˚K and index n=1.3.

Assignment 1 (TOM) Page 1

R. C. TECHNICAL INSTITUTE SOLA

MECHANICAL ENGINEERING DEPARTMENT

Subject: Theory of Machine Subject Code: 3341903

Assignment 1

1) Give examples of Lower pair and higher pair.

2) Explain in brief the difference between machine and mechanism.

3) What is inversion of mechanism?

4) Explain in brief the mechanical advantage and velocity ratio.

5) List the Inversions of a double slider crank mechanism.

6) Define the following terms. (1) Link (2) Mechanism.

7) Define the following terms. (1) Lower pair (2) Higher pair.

8) What is turning pair? Give example of turning pair.

9) Draw neat Sketch of any one inversions of a slider crank mechanism.

10) Draw neat Sketch of any one inversions of a Double-slider crank mechanism.

11) Differentiate between kinetics and kinematics.

12) Sketch an Oldham’s Coupling.

13) State the type of quick return motion mechanisms and explain any one with neat

sketch.

14) Sketch and explain any two inversions of a four bar chain.

15) Sketch and explain crank and slotted lever type quick return motion mechanism.





Assignment 2

1. Give the four equation of angular motion.

2. Define linear and angular velocity. State relation between them.

3. With a neat sketch explain four bar chain mechanism and draw the velocity

and acceleration diagram for the same based on relative velocity method.

4. For a four bar mechanism ABCD, AD = 3.5 m is a fixed link. Driving link

AB = 0.5 m, driven link CD = 1.5 m, link BC = 3 m and Angle BAD = 600

.Link AB rotates at 20 rpm in clock wise direction, Determine (i) Angular

velocity of link BC.(ii)Linear velocity of point E lying on link BC at 2.25 m

from B.

5. With neat sketch explain the Klien’s construction to find out the velocity of

various links of slider crank chain.

6. In a steam engine, the crank and connecting rod are 300mm and 1500 mm

long respectively. Draw the velocity diagram when crank has rotated in

clock wise direction for 500from I.D.C. Find the engine speed when the

velocity of piston is 4.9 m/s.

7. The crank of a steam engine is 150 mm long and the connecting rod is 600

mm long. The crank is at 30° from IDC and engine speed is 240 rpm clock

wise. Find (i) velocity and acceleration of piston. Use relative velocity and

acceleration method.

8. Explain the graphical method for finding out the velocity and acceleration of

the point D lying on the connecting rod.

9. Explain the motion of a particle when it moves in curvilinear path showing

its velocity and acceleration with suitable figure.

10. In a four bar linkage ABCD, AD = 3.6 m. is fixed link. Driving link AB =

0.6 m., driven link CD = 1.6 m. and link BC = 3 m. Angle BAD = 600. Link

AB rotates at 40 rpm in clockwise direction; determine (i) Angular velocity

of link BC (ii) Linear acceleration of point E lying on link BC at 2.5 m.

from B.





Assignment 3

1. Define cam and state the function of cam.

2. List types of followers and explain any one with figure.

3. Draw a displacement Diagram for SHM Knife edge follower.

4. Define Base circle and Pitch curve with appropriate figure.

5. State the types of motion for the followers. Explain any one type of motion

with the help of displacement diagram.

6. Why roller followers are preferred compared to knife- edge followers?

7. Draw the profile of the cam that gives a lift of 40 mm to a roller follower,

dia.15 mm. The axis of the follower passes through the center of the cam.

The cam rotates in clockwise direction. The minimum radius of the cam is

30 mm. The follower is to be lifted with simple harmonic motion during

1200 of cam rotation, dwells for 300 of the cam rotation in the lifted

position, returns to initial position during 900 of cam rotation with uniform

velocity motion, and dwells for remaining degree of cam rotation.

8. Draw the profile of a cam operating a knife-edge follower with the

following data.

Least radius of a cam = 25 mm. Lift of the follower = 50 mm.

The cam lifts the follower for 1500 with SHM followed by a dwell period of

300 .Then follower lowers down during 1200 of cam rotation with uniform

acceleration and deceleration followed by a remaining dwell period.Assume

clockwise rotation of a cam.

9. A disc cam is used to give motion to a knife edge follower. For the 1st 1200

of cam revolution, follower moves up 60 mm with simple harmonic motion.

For the next 600 of cam revolution, follower remains at rest. For the next

1200 of cam revolution follower comes down with uniform velocity. For

remaining period of cam revolution it remains at rest. Diameter of base

circle of cam is 50 mm. assume cam rotates in anti-clockwise direction.

Draw cam profile.


10. Draw the cam profile for a disc cam and knife edge follower from the

following data for one revolution of cam. Angle of rise = 600, Follower lift

= 40 mm with uniform velocity. Angle of dwell (at rise) = 300 where the

follower moves with uniform velocity. For remaining period of 2100, the

follower remains in same position. Diameter of base circle = 50 mm.

r.c.technical institute,sola,ahmedabad mechanical ...€¦ · explain in brief interchangeability...

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