MU Mechanical Engineering (Semester 3)
Production Process - 1
December 2016
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


Write a short note any four Q1.(a,b,c,d,e)
1(a) Transfer molding process
5 M
1(b) Friction welding
5 M
1(c) CO2 mould casting
5 M
1(d) Extrusion
5 M
1(e) Mechanism of sintering
5 M

2(a) With a neat sketch explain the principle and working of resistance welding process. Also discuss its advantages, limitations, and applications.
8 M
2(b) Differentiate Welding, soldering and brazing.
6 M
2(c) Discuss Rotational Molding process with neat sketch.
6 M

3(a) Describ the basic steps of provider metallurgy process. Discuss applications, advantages and disadvantages of power metallurgy.
8 M
3(b) Describe inspection of castings.
6 M
3(c) Write short note on microstructure of welds.
6 M

4(a) What is NDT.List various methods of NDT Explain Ultrasonic method of crack detection.
8 M
4(b) With a neat sketch explain the working principle of plastic injection mounding process.
6 M
4(c) What is meant by forging? Differentiate between closed die forging and open die forging.
6 M

5(a) Define weldability. Differentiate between TIG and MIG welding process.
10 M
5(b) Describe in detail various rolling defects.
10 M

6(a) A cylindrical riser must be designed for a sand casting mould. Casting itself is a rectangular plate made of steel, with dimensions 7.5 cm X 12.5 cm X 2.0 cm. Previous observations have indicated that the total solidification time (TST) for this casting is 1.6 min. The cylinder for riser will have D/H ratio=1. Determine the dimensions of riser so that its TST=2.0 min.
8 M
6(b) Explain vacuum forming process of polymers.
6 M
6(c) Write short note on application of plastics in industries.
6 M



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