Solved Important Questions

SOLVED QUESTIONS

1. Working on the metal Lead at room temperature, is considered to be hot working. Why?

Refer chapter 3.2.1 in Page 3.2.

2. Describe the principle of hot and cold working processes. Compare them.

Refer chapter 3.2.1 in Page 3.2 for hot working and chapter 3.2.2 in Page 3.4 for cold working.

3. Discuss the advantages and limitations of hot working and cold working.

Refer chapter 3.2.1.2 in Page 3.3 for advantages of hot working, chapter 3.2.1.3 in Page 3.3 for limitations of hot working and chapter 3.2.2.2 in Page 3.5 for advantages and limitations of cold working.

4. Explain the steps involved in the forging operation.

Refer chapter 3.3.1 in Page 3.6.

5. Classify forging operations.

Refer chapter 3.3.2 in Page 3.7.

6. Explain the principle of open-die forging with its neat sketch.

Refer chapter 3.3.3 in Page 3.7.

7. Write short notes on impression die forging.

Refer chapter 3.3.4 in Page 3.8.

8. Sketch a closed-die forging process and explain its salient features.

Refer chapter 3.3.5 in Page 3.9.

9. Write down the characteristics of open die and closed die processes. 

Refer chapter 3.3.6 in Page 3.10.

10. Distinguish between open die and closed die forging processes.

Refer chapter 3.3.7 in Page 3.11.

11. Explain the steps involved in drop forging with neat sketches. 

Refer chapter 3.3.8 in Page 3.12.

12. Give the advantages of press forging over drop forging.

Refer chapter 3.3.10 in Page 3.14.

13. Briefly explain about seamless rolled ring forging.

Refer chapter 3.3.14 in Page 3.16.

14. Explain the precision forging process with neat sketch and also compare with closed die forging process.

Refer chapter 3.3.13 in Page 3.16.

15. List four tools used for forging. Sketch any two of them.

Refer chapter 3.3.15 in Page 3.17.

16. Explain the working of drop hammer with a neat sketch.

Refer chapter 3.4.1 in Page 3.23.

17. With a neat sketch, explain the working of a pneumatic hammer for forging.

Refer chapter 3.4.2 in Page 3.23.

18. Explain the various forging operations.

Refer chapter 3.6 in Page 3.28.

19. Distinguish between forging hammers and forging presses.

Refer chapter 3.5.4 in Page 3.28.

20. How do you compare forged components with cast components?

Refer chapter 3.5.4 in Page 3.28.

21. Explain with neat sketches of upsetting and drawing down operations.

Refer chapter 3.6.1 in Page 3.28 for upsetting and chapter 362 in Page 3.29 for drawing down.

22. With neat sketches, explain the following smith forging operations:

(i) Upsetting

(ii) Bending

(iii) Swaging

(iv) Fullering

(v) Punching and drifting

(vi), Edging.

Refer chapter 3.6 in Page 3.28.

23. What is smith forging operation? With neat sketches, explain upsetting, bending and swaging operations.

Refer Page 3.18 for smith forging, chapter 3.6.1 in Page 3.28 for upsetting, chapter 3.6.6 in Page 3.32 for bending and chapter 3.6.7 in Page 3.32 for swaging.

24. Briefly explain the various operations performed in forging process.

Refer chapter 3.6 in Page 3.28.

25. List out the various forging defects.

Refer chapter 3.8 in Page 3.37.

26. Draw a simple sketch showing rolling process and make a short note on deformation of grains in rolling.

Refer chapter 3.10 in Page 3.39.

27. With neat sketches, explain the different types of roll stand arrangements used in the rolling mills and state clearly for what purpose each arrangement is used.

Refer chapter 3.11.1-3.11.7 in Page 3.42-3.44.

28. Sketch and explain the working of "Universal rolling mill" and "planetary rolling mill".

Refer chapter 3.11.6 in Page 3.44 for Universal rolling mill and chapter 3.11.7 in Page 3.44 for planetary rolling mill.

29. Briefly explain flat strip rolling operation.

Refer chapter 3.12 in Page 3.45.

30. Derive the mathematical expression for the Flat strip rolling process to calculate the rolling load. [Anna Univ. Dec '16]

Refer chapter 3.12 in Page 3.45.

31. Explain the shape rolling operations.

Refer chapter 3.13 in Page 3.56.

32. With suitable sketches, explain the stages involved in Shape rolling of structural sections.

Refer chapter 3.13 in Page 3.56.

33. Describe the ring rolling and thread rolling process.

Refer chapter 3.13.1 in Page 3.57 for ring rolling and chapter 3.13.2 in Page 3.58 for rolling.

34. Explain the working of Mannesmann process with a neat sketch. 

Refer chapter 3.13.3 in Page 3.60.

35. What are the defects in parts produced by rolling? Explain any four defects.

Refer chapter 3.14 in Page 3.61.

36. What is drawing operation?

Refer chapter 3.15 in Page 3.64.

37. Define drawing and discuss the classifications with a neat sketch.

Refer chapters 3.15 & 3.16 in Page 3.64.

38. Describe a wire-drawing process.

Refer chapter 3.16.1 in Page 3.64.,

39. With a neat sketch, explain the principle used in tube drawing process.

Refer chapter 3.16.5 in Page 3.67.

40. How is tube drawing carried out? Explain with a suitable sketch.

Refer chapter 3.16.5 in Page 3.67.

41. What is deep drawing operation? Explain with a neat sketch.

Refer chapter 3.16.7 in Page 3.70.

42. Explain the working of some drawing equipment.

Refer chapter 3.17 in Page 3.73.

43. Define extrusion and explain the various types of extrusion.

Refer chapters 3.18 & 3.19 in Pages 3.74 & 3.75.

44. With neat diagram explain the process of forward extrusion. Explain also how hollow sections can be produced in this process.

Refer chapter 3.19.1.1 in Page 3.76.

45. Explain the forward and backward extrusion process. [Anna Univ. May'05 & May'15]

Refer chapter 3.19.1.1 in 3.76 for forward extrusion and chapter 3.19.1.2 in 3.77 for backward extrusion processes.

46. Write short notes on impact extrusion and hydro static extrusion.

Refer chapter 3.19.2 in Page 3.78.

47. With suitable sketches, explain the following:

(i) Stages involved in ‘Shape rolling' of structural sections

Refer chapter 3.13 in Page 3.56.

(ii) Cold extrusion

Refer chapter 3.19.2 in Page 3.78.

(iii) Seamless tube drawing.

Refer chapter 3.13.3 in Page 3.60.

48. Describe the indirect extrusion process for solid and hollow workpiece and hydrostatic extrusion process.

Refer chapter 3.19.1.2 in Page 3.77 for indirect extrusion and chapter 3.20 in Page 3.80 for hydrostatic extrusion process.

49. List the advantages and disadvantages of extrusion process.

Refer Page 3.75, 3.76 & 3.79.

50. Describe the principle of hydrostatic extrusion.

Refer chapter 3.20 in Page 3.80.