Manufacturing Process 1 - Jan 2014

Mechanical Engineering (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 briefly explain the different steps involved in a casting process.(8 marks) 1 (b) Discuss in detail the different materials used in making a pattern.(6 marks) 1 (c) Briefly discuss the importance of binders and additives used in sand moulding.(6 marks) 2 (a) List the the type of modulating sand. Discuss the desirable properties of moulding sand.(8 marks) 2 (b) With neat sketch, explain jolt type moulding machine.(7 marks) 2 (c) List casting defects. Discuss any two.(5 marks) 3 (a) With neat sketches, describe the shell moulding process. List advantages of the process.(10 marks) 3 (b) What is die-casting? With a neat and labeled sketch, explain cold chamber diecasting process.(10 marks) 4 (a) With neat sketch, show the construction details of a Cupola furnace. Also indicate different zones and write the reactions taking place in each of the zones.(10 marks) 4 (b) With neat sketch, explain the working of a direct arc electric furnace. (10 marks) 5 (a) Explain the following, with neat sketches:
(i) Submerged arc welding
(ii) Oxy-acetylene welding.
and their field of applications.(10 marks) 5 (b) With neat sketch, explain forward and backward welding methods.(10 marks) 6 (a) With neat sketches, explain the following:
(i) Seam welding
(ii) Projection welding(8 marks) 6 (b) With a sketch, explain the electron beam welding process and mention its applications.(12 marks) 7 (a) With neat sketch, explain heat affected zone (HAZ) and its various regions.(10 marks) 7 (b) Explain the different welding defects and also give cause and remedies.(10 marks) 8 (a) What is non-destructive testing? Explain with neat sketch ultrasonic inspection and its application areas.(10 marks) 8 (b) With neat sketch, explain fluorescent particle inspection process and its application areas.(10 marks)