Bharathiyar College of Engineering & Technology , Karaikal-609609

Department Of Mechanical Engineering

Date: 16.10.2014Duration : 9.30 a.m to 12.30 p.mMax. marks: 75

Sub Code & Subject: MEE712 - ADVANCED WELDING TECHNIQUES

Year & Sec: IV - A&BName of the Faculty : Mr. C.R.GOVINDASAMY & Mr. R.ARUNKUMAR

PART A (10 X 2 = 20 Marks)Answer all the questions:1. Define the term welding.2. What are the various types of flames in gas welding?

3. What is polarity in DC welding?

4. Define submerged arc welding.

5. Define solid state bonding.

6. List the types of thermit welding.

7. Write the methods for minimize residual stresses.

8. Write the limitations of welding of plastics.

9. Define NDT.

10. What are types of destructive testing?PART B (5 X 11 = 55 Marks)Answer all the questions, choose ONE from each questions.11. Name any five important welding processes and explain any two.

Or12.Describe with a neat sketch of oxy acetylene gas welding equipments.

13. Explain the working principle of carbon arc welding with neat sketch.Or14.Explain the working principle of submerged arc welding with neat sketch. Write the advantages & disadvantages.15. Explain the laser beam welding process with their applications.Or16.Explain the following i) Electrogas welding ii) Electroslag welding.

17. Explain the working principle of Ultrasonic welding with neat sketch.

Or18.Describe the processing of welding of plastics with a neat sketch.

19. Briefly explain the magnetic particle testing method in welded joints.Or20.Explain any two destructive testing methods.