MU Mechanical Engineering (Semester 3)
Production Process - 1
December 2015
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary


1 (a) Explain various welding defects with their causes and remedies.
10 M
1 (b) Differentiate between soldering and brazing.
5 M
1 (c) Compare transfer molding and compression molding.
5 M

2 (a) A cylindrical riser is to be designed for a sand casting mould. The size of steel casting is 7.5 cm × 12.5 cm × 2cm. The previous observation have indicated that the total solidification time for casting is 96 sec.
The cylindrical riser have (d/h)=I. Find the size of user so that its solidification Time is 120 sec.
10 M
2 (b) Discuss friction welding with its applications.
5 M
2 (c) Differentiate between open and closed die forging.
5 M

3 (a) Discuss various rolling defects.
6 M
3 (b) Differentiate between core and core point.
6 M
3 (c) With a neat sketch explain resistance welding process giving its applications.
8 M

4 (a) Write advantages and disadvantages of powder metallurgy.
6 M
4 (b) With a neat sketch explain swaging process.
6 M
4 (c) What are the different NTD methods? Explain any two methods in detail.
8 M

5 (a) Explain the screw type injection moulding with neat sketch. Discuss its advantages, limitations and applications.
8 M
5 (b) Discuss different methods of making in powder Metallurgy.
6 M
5 (c) Explain different gas welding equipments.
6 M

Write short note on:
6 (a) Pattern allowances
5 M
6 (b) Casting defects
5 M
6 (c) Thermite welding
5 M
6 (d) Thread rolling.
5 M



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