Manufacturing Process 1 - Jun 2013

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) Explain the basic steps involed in a casting process.(6 marks) 1 (b) What are pattern allowaness ?Explain any two(5 marks) 1 (c) What are additives ?list the various addivtives used in moulding sand.(4 marks) 1 (d) Explain with neat sketch sweep pattern.(5 marks) 2 (a) Describe the desirable properties of a moulding sand.(6 marks) 2 (b) What are the casting defects? Explain any two.(6 marks) 2 (c) With neat sketch explain Jolt-squeeze moulding machine.(8 marks) 3 (a) Explain briefly the following with sketches :
i) CO₂.ii) Shell moulding .(10 marks) 3 (b) Explain the following with neat sketch
i) Centrifuging ii) Squeeze-casting(10 marks) 4 (a) Explain the construction and working of principle of direct electric arc furnace. List the advantages.(10 marks) 4 (b) Explain with neat sketch working principle of resistance furnace. List the advantages, disadvantages and application.(10 marks) 5 (a) Define welding . Give classification of welding process.(6 marks) 5 (b) Explain Inert Gas Metal Arc welding (MIG) and atomic hydrogen welding process.(8 marks) 5 (c) Expalin briefly forward and backword welding methods in gas welding.(6 marks) 6 (a) Expalin the principle of seam welding with neat sketch.(6 marks) 6 (b) With neat sketch explain projection welding process. List the advantages of projection welding.(8 marks) 6 (c) With neat sketch explain explosive welding process. List the application.(6 marks) 7 (a) Discuss the factors affecting weldability of metals.(6 marks) 7 (b) Explain the parameters affecting Heat Affecting zone (HAZ) briefly.(6 marks) 7 (c) Explain briefly weldings defects and its causes.(8 marks) 8 (a) Compare soldering and brazing processes. Mention their advantages and disadvantages.(10 marks) 8 (b) What is NDT? Explain radiography and Eddy current method of inspection of metals.(10 marks)