Production Process - 1 - Dec 2014

Mechanical Engineering (Semester 3)

TOTAL MARKS: 80
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Assume data if required.
(4) Figures to the right indicate full marks. 1 (a) Classify various welding processes in detail.(5 marks) 1 (b) What is meant by blending and compacting in powder metallurgy?(5 marks) 1 (c) Compare transfer moulding and compression moulding processes.(5 marks) 1 (d) State the function of a riser.(5 marks) 2 (a) What is the difference between a core and a core print?(5 marks) 2 (b) What are the typical application areas of powder metallurgy process?(5 marks) 2 (c) Describe injection moulding process for thermoplastics with a neat labelled sketch.(5 marks) 2 (d) Describe MPT process with a neat labelled sketch.(5 marks) 3 (a) What is meant by solid state welding processes? List various solid state welding processes. Draw a neat labelled sketch of any one solid state welding processes.(5 marks) 3 (b) What is meant by sintering?(5 marks) 3 (c) Describe lamination process for plastics with a neat labelled sketch.(5 marks) 3 (d) What is meant by forging? Differentiate between closed die forging and open die forging.(5 marks) 4 (a) Draw neat labelled sketches of the various types of cores used in sand casting?(5 marks) 4 (b) What is meant by a riser? State the functions of a riser.(5 marks) 4 (c) What are the limitations of powder metallurgy processes over other competing processes?(5 marks) 4 (d) Describe calendering process for plastics with a neat labelled sketch.(5 marks) 5 (a) Differentiate between MIG welding and TIG welding.(5 marks) 5 (b) What are the advantages of using a metal pattern?(5 marks) 5 (c) What is blending and compacting in powder metallurgy?(5 marks) 5 (d) Describe Ultrasonic Testing process with a neat labelled sketch.(5 marks) 6 (a) What is the effect of cold working of metal.(5 marks) 6 (b) How is swaging process carried out? Draw a neat labelled sketch to support this.(5 marks) 6 (c) Describe resistance seam welding process with a neat labelled sketch.(5 marks) 6 (d) Difference between direct extrusion and indirect extrusion. Also draw a neat labelled sketch of both of them.(5 marks)