Weld

Register Number :

Name of the Candidate :

5397

DIPLOMA EXAMINATION, 2007

( WELDING ENGINEERING AND TECHNOLOGY ) ( PAPER - IV )

140. WELDING METALLURGY AND WELDABILITY TESTING

December ]

[ Time : 3 Hours

Maximum : 100 Marks

Answer any FIVE questions. All questions carry equal marks.

1. (a) Draw Iron – carbon diagram and write various invariant reactions. (10) (b) Write short notes on : (i)

Annealing.

(10)

(ii) Normalising.

(iii) Solution treatment. Turn over

2

3

2. (a) What are the problems encountered with welding of carbon steels and what are the remedial actions ? (10)

6. (a) Write the welding procedure for copper. (10)

(b) Explain the problems encountered with welding of duplex stainless steels and what are the remedial actions ?

(10)

3. (a) Write the welding procedure for titanium alloys. (10)

(b) Explain the precautions to be observed in welding of copper.

4. (a) Write short notes on : (i)

Lamellar cracks.

(10)

(ii) Stress corrosion cracks.

(10)

techniques.

(10)

(b) Explain the theory of stress relieving 5. (a) Write short notes on : (i)

Ring weldability test.

(ii) Hot ductility test.

(10)

(b) Explain any two methods of Non – Destructive testing. (10)

(b) What are the problem encountered with welding of aluminium. (10)

7. (a) Explain the problem associated with welding Cr – Mo steels. (10) (b) Write short notes on : (i)

HSLA steels.

(10)

(ii) Q & T steels.

8. (a) Describe briefly about the temperature distribution in welding. (10) (b) Write short notes on microstructure products in weldments. (10)