Metal Joining Technology — Summer 2018

Write the advantages of welding process over the riveting process.

Define following terms:-Heat, Time (T), Resistances (R), and Electrode Pressure.

Write arc initiation and arc maintenance method used in submerged arc welding and manual metal arc welding.

Write a function of coating on electrode.

What precautions must be taken during welding of dissimilar metals?

Discuss the importance of pre and post weld heat treatment? Explain any one method of PWHT.

Explain Local Coalescence in Welding Process. Classify Welding processes based on following criteria: - (1) Metallurgical aspect, (2) Based on Automation adopted (3) Based on types of energy used (4) Based on types of principle (5) Based on type of shielding.

Explain the principal operation of gas welding.

Draw Weld bead and show penetration, reinforcement, width, throat, leg on it.

What is crater? Explain remedies of crater cracking.

Define: - Brazing, Soldering, Welding.

Compare consumable and non-consumable electrode.

What are the selection factors for arc welding electrodes?

Write the causes and remedies for following welding defects: - Slag inclusion, Q.4 Incomplete penetration, Porosity.

Explain the different types of flames.

Write a short note on weldability.

Draw the fundamental types of Joints.

Differentiate between Electro slag and Elector gas welding in detail with sketch.

Draw any six welding symbol with name.

Write a short note on welding fluxes.

Explain coding and classification of mild steel and alloy steel electrodes as per Indian and American system **************** BEST OF LUCK