Question Bank Mechanical Maintenance

QUESTION BANK MECHANICAL MAINTENANCE

THE LATHE

1. List the required properties of a cutting fluid.

2. List the functions of cutting fluids.

3. What is cutting fluids? What are the various types of cutting fluids?

4. Explain thread cutting operation.

5. List the operations to be performed on the lathe and explain any two in details.

6. List the lathe accessories and explain any two in detail.

7. Explain the working of back gear mechanism with a neat sketch.

8. State the function of following lathe parts:

(a) Tailstock, (b) Headstock, (c) Carriage,

(d) Half nut, (e) Apron, (f) Back gear,

(g) Compound rest, (h) Change gear.

9. What is lathe bed? Mention the types of bed and explain.

10. How is size of lathe specified?

11. Explain with the help of neat sketch, the working principle of lathe.

12. State different types of mandrel. Explain any two with neat sketch.

13. Explain taper turning by form tool with neat sketch.

14. Explain taper turning by swivelling the compound rest by neat sketch.

15. Enlist different lath operations. Explain any two with neat sketch.

16. Explain three jaw chuck with neat sketch.

17. Enlist different types of lathe bed. Explain any one with neat sketch.

18. Explain steady rest and follower rest with neat sketch.

DRILLING MACHINE

1. Drilling is always followed by reaming. Why?

2. What are the operations you can perform on a drilling machine?

3. What are the various work holding devices adopted for drilling? Describe any two.

4. What are the drill holding devices used in drilling machine? Explain any one in brief.

5. What are the various types of drill?

6. Write a short note on gang drilling machine.

7. List the types of drilling machines. Draw neat sketch of sensitive drilling machine and mark important parts.

8. Explain radial drilling machine with neat sketch?

9. Why reaming is done after drilling?

10. Enlist different tool holding devices of drill. Explain any two with neat sketch.

11. Enlist different drilling operations. Explain any two with neat sketch.

GRINDING MACHINE

1. What do you mean by dressing of a grinding wheel?

2. What do you mean by glazing and loading of a grinding wheel?

3. What essential factors will you take into consideration while selecting of grinding wheel?

4. Sketch the different types of grinding wheel.

5. What do you mean by grain, grade and structure of grinding wheels?

6. What do you mean by bond? What are the different types of bonds?

7. What do you mean by abrasives? What are the different types of abrasives?

8. Write a short note on tool and cutter grinder with neat sketch.

9. Explain centreless grinding with neat sketch?

10 Write a short note on bench grinding machine.

11. Give the classification of grinding machines.

12. Draw a neat sketch of any two standard grinding wheel.

13. Explain belt grinder with neat sketch?

MAINTENANCE

1. Write a short notes on the following:

(a) Importance of maintenance.

(b) Breakdown maintenance.

2. What are the functions of preventive maintenance?

3. State the advantages of preventive maintenance.

I.C. ENGINE

1. Write a short note on care and maintenance of I.C. engines.

2. What is the importance of flywheel of I.C. engine?

3. Why does I.C. engine need cooling of cylinder?

4. Fill in the blanks to complete the following statements:

(a) A ……… stroke engine contains valves.

(b) In ………… stroke engine the cycle of operation is completed in 360° of crank rotation.

(d) ………… is used in petrol engine to vaporize the petrol and to produce homogenous air fuel mixture.

(e) ………… is used in diesel engine to inject the fuel.

(f) Spark plug is used in ……… engine.

5. Compare the two stroke engine with four engine in terms of merits and demerits.

6. Differentiate between petrol engine and diesel engine.

7. Explain the working of two stroke petrol engine.

8. Explain the working of four stroke diesel engine.

9. Explain with a neat diagram the working cycle of four stroke petrol engine.

10. List the principal parts of I.C. engine.

11. Give the classification of I.C. engine.

12. Explain working of flywheel?

13. Write a note on care and maintenance of I.C. engine.

PUMPS

1. Compare the centrifugal pump and reciprocating pump.

2. State the functions of air vessel in a reciprocating pump.

3. Explain the working of reciprocating pump.

4. Mention the main components of a reciprocating pump.

5. Draw a labelled diagram of reciprocating pump.

6. Write a short note on priming of centrifugal pump.

7. Explain the working of centrifugal pump with the help of a neat sketch.

8. List the parts of centrifugal pump and state the functions of each in brief.

9. What do you mean by pump? Give the classification of pump.

10. Explain multi-staging of centrifugal pump.

11. Explain functions of strainer and foot valve in centrifugal pump.

12. Enlist different types of casing. Explain any one with neat sketch.

13. Explain different types of impeller used in centrifugal pumps.

14. Give the classification of centrifugal pump.

AIR COMPRESSOR

1. What do you mean by air compressor?

2. What are the various uses of compressed air in industries?

3. Give the classification of air compressor.

4. Describe the working of simple reciprocating compressor with the help of a neat sketch

SHAPING, PLANING, SLOTTING AND MILLING MACHINES

1. Explain the working principle of shaper with the help of a sketch.

2. Give the classification of shaper.

3. List the main parts of shaper.

4. Name the quick return mechanism used in a shaper and describe the working of a crank and slotted link mechanism in details.

5. How will you specify shaper?

6. Name the work holding devices used on a shaper.

7. Name operations which can be performed on a shaper.

8. Explain the working principle of planer.

9. Give the classification of planer.

10. List the main parts of planer.

11. Name the quick return mechanism used in planer and explain any one in detail.

12. List the work holding devices in planer.

13. List the planer operation.

14. What are the main differences between the shaper and planer.

15. Give the working principle of slotter.

16. List the main parts of slotter.

17. Name the quick return mechanism used in slotter.

18. List operations on slotter.

19. Explain working principle of milling operation with neat sketch.

20. What are the types of milling machines.

21. Sketch the column and knee type milling machine. What is difference between a plan milling machine and universal milling machine.

22. List the main parts of column and knee type milling machine.

23. List the different types of cutters used on milling machine and also state their use.

24. Name common methods of indexing and explain direct indexing in detail.

25. List the milling operations.

26. Write short note on care and maintenance of machine tool.

27. Write short note on indexing.

28. Differentiate between upmilling and down milling.

29. Enlist different types of indexing. Explain any one in detail.

TESTING OF MACHINES

1. State the necessity of testing of a machine tool.

2. Name the various alignment test are generally performed on machine tools.

3. What are the measuring equipments required for testing of machine tools.

4. Which are the different types of alignment used on lathe machine? Explain any two with neat sketch.

5. List the different types of alignment test on drilling machine.

6. State various geometrical test made generally on machine tool.

7. Write short note on feeler gauge with neat sketch.

MATERIAL HANDLING DEVICES

1. Write the importance of material handling in industries.

2. Give short notes on the following:

a. Winches b. Jacks c. Conveyors

3. What are the general rules for safe material handling?

MECHANICAL DRIVES

1. What are the different types of mechanical power transmission?

2. What are the different materials used for belt drive?

3. Write short note on of the following:

(a) Muff or sleeve coupling.

(b) Flange coupling.

(d) Oldham’s coupling.

(e) Universal or Hooke’s coupling.

4. State the advantages and disadvantages of the following drives:

(a) Belt drive, (b) Chain drive, (c) Gear drive.

5. What are the various types of gears used for power transmission?

6. Give classification of couplings.

7. What do you mean by couplings?

8. What do you mean by clutch?

9. Write short notes on the following:

(a) Square jaw clutch?

(b) Single plate clutch

10. Give the care and maintenance of clutches.

11. Differentiate between open belt and cross belt drive.

12. Enlist different types of gears used for power transmission.

13. Give classification of coupling.

14. What are the different means of power transmission.

TRIBOLOGY

1. What is mean by lubricant?

2. What are purposes of lubricant?

3. Give classification of lubricant?

4. What are the desirable qualities of a good lubricant?

5. What are the various methods of lubrication and describe any three.

6. What do you meant by bearings?

7. Give classification of bearings.

8. What are the principle functions of bearing?

9. Give the advantages and disadvantages of sliding contact and rolling contact bearing.

PLUMBING

1. What are the various types of pipes?

2. List the different pipe material used in plumbing.

3. Write short note on pipe fitting.

4. List the tools and equipments used in pipe fitting work.

PST