Manufacturing Process 1 - Jun 2015

Mechanical Engg. (Semester 3)

TOTAL MARKS: 100
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any four from the remaining questions.
(3) Assume data wherever required.
(4) Figures to the right indicate full marks. 1 (a) List and explain different steps involved in making sound casting.(10 marks) 1 (b) Define pattern explain with neat sketch 'sweep' pattern.(10 marks) 2 (a) List the different properties of moulding sand, and explain any four.(10 marks) 2 (b) With a neat sketch explain sand slinger.(10 marks) 3 (a) Explain with neat sketch 'shell moulding' process.(12 marks) 3 (b) Explain with neat sketch true centrifugal casting.(8 marks) 4 (a) How melting furnaces are classified? Explain cupola furnace with neat sketch.(14 marks) 4 (b) Differentiate oil fired crucible furnace over a coke fired furnace.(6 marks) 5 (a) Define welding. List the advantages, disadvantages and applications.(10 marks) 5 (b) Explain with a neat sketch 'TIG' welding and list its applications.(10 marks) 6 (a) Explain with a neat sketch Laser beam welding process.(10 marks) 6 (b) What is the principle of Resistance welding? With a neat sketch Explain 'Thermite' welding.(10 marks)

Write a short notes on the following:

7 (a) Heat affected zone (HAZ).(5 marks) 7 (b) Welding defects.(5 marks) 7 (c) Residual stresses.(5 marks) 7 (d) Electrodes.(5 marks)

Explain the following NDT with sketches.

8 (a) (i) Radiography inspection.(7 marks) 8 (a) (ii) Magnetic particle inspection.(7 marks) 8 (b) Differentiate between Soldering and Brazing.(6 marks)