Manufacturing Process 1 - Dec 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) Briefly explain the steps involved in metal casting process, with a neat flow diagram.(10 marks) 1 (b) List the types of patterns and explain any 3 of them, with neat sketches.(10 marks) 2 (a) What are the desirable properties of moulding sand?(5 marks) 2 (b) Explain briefly the different casting defects during casting process(5 marks) 2 (c) With a neat sketch, explain the working principle of Jolt & Squeeze moulding machine.(10 marks) 3 (a) With a neat sketch, explain the steps involved in shell moulding.(10 marks) 3 (b) What ale the steps involved in investment casting? Explain in brief; with neat sketches.(10 marks) 4 (a) Explain the construction and working principle of 'CUPOLA' furnace, with neat sketch.(12 marks) 4 (b) Explain with a neat sketch, working of coreless induction furnace(8 marks) 5 (a) Sketch and explain TIG welding process and its application(7 marks) 5 (b) Explain with a neat sketch, the Submerged Are Welding (SAW) process.(7 marks) 5 (c) With a neat sketch, explain the Oxy-acetylene gas welding process.(6 marks) 6 (a) Sketch and explain the Thermite welding process and mention the advantages, disadvantages and applications.(10 marks) 6 (b) With a neat sketch, explain the Laser Beam welding process and mention its advantages, disadvantages and applications.(10 marks) 7 Write a short notes on:
a. Residual stresses in welding.
b. Electrode using in welding.
c. Welding defects.
d. HAZ in welding.(20 marks) 8 (a) Differentiate Soldering and Brazing.(5 marks) 8 (b) What are the different Non - Destructive Testing (NDT) methods and explain with neat sketches of Magnetic Particle Inspection and Radiographic Inspection method.(15 marks)