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Friday, 28 February 2014

Manufacturing process-I -model question paper for B.E/B.Tech/M.E/M.Tech Engineering


1 (a) List the advantages and limitations of casting process. (4 Marks)
(b) What is distortion allowance? Explain the need for the same. (4 Marks)
(c) With a neat sketch, explain the working of Jolt-Squeeze type moulding machine. (6 Marks)
(d) List different types of cores. Draw representative figures for each type. (6 Marks)
2 (a) What is the principle of Thixocasting process? (4 Marks)
(b) What are the zones in Cupola? With a neat sketch explain the same. (6 Marks)
(c) Compare how gates and risers are removed in carbon steel castings and cast iron castings. (6 Marks)
(d) Explain the factors which contribute to casting defects. (4 Marks)
3 (a) Write a note on NDT using ultrasonic waves. (6 Marks)
(b) Explain two methods of moisture content determination. Which one of them is preferred in shop floor? (6 Marks)
(c) What are chills? Explain the need for chills. (4 Marks)
(d) Explain degassing of aluminium alloy by using hexachloroethane tablet and N2 gas purging. (4 Marks)
4 (a) What is the effect of grain refinement on mechanical properties? (4 Marks)
(b) Explain the effect of inoculation on mechanical properties (4 Marks)
(c) Briefly explain the foundry characteristics of cast iron, white iron and steel. (6 Marks)
(d) With neat sketches bring out the need for design for minimum casting stress. (6 Marks)
5 (a) What is pouring time? Explain its significance. (4 Marks)
(b) Explain Chvorinov’s rule. (4 Marks)
(c) Draw a neat flow chart of sand preparation plant and discuss how it can be mechanized. (6 Marks)
(d) Explain how computers can be used in a foundry. (6 Marks)
6 (a) List down the advantages, limitations and applications of welding. (6 Marks)
(b) What is the function of flux in gas welding? (4 Marks)
(c) Differentiate between DC and AC arc welding. (6 Marks)
(d) What is residual stress in welding? Explain. (4 Marks)
7 (a) What problems are associated with resistance welding of tin, lead and antimony metals? (4Marks)
(b) With a neat sketch explain how microstructure varies in a medium carbon steel. Show all the regions. (6 Marks)

(c) Explain the process details of ultrasonic welding and electron beam welding. (6 Marks)

(d) List down different types of welding defects. (4 Marks)

8 (a) What is brazing? What are the steps in brazing process? (8 Marks)

(b)Give the application of brazing. (4 Marks)

(c) What is wetting? Explain how it affects soldering. (4 Marks)

(d) List down types of soldering. (4 Marks)

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