NORTHERN INDIA ENGINEERING COLLEGE DELHI
Mechanical and Automation Engineering Department
Course:- B.Tech. Ist Semester
Assignment No-3
Sub:- Manufacturing process
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Classify resistance welding process. What are their fields of application?
What is shielded metal arc welding? List the equipment used.
What is the difference between TIG welding and MIG welding? Write their field of applications?
What is the difference between brazing and soldering? Write their field of applications?
What is meant by flux coating? What are its constituents and their functions?
Differentiate between straight polarity and reverse polarity in DC welding.
What are different types of electrodes?
Define weld ability.
What do you mean by non-fusion welding?
What are the various factors which affect the section of electrode?
Write any two industrial application of oxyacetylene gas welding.
What are the different welding positions?
Name of the electrode use in atomic hydrogen welding.
Write the function of the flux and its composition in metal arc welding.
Draw label and explain the various type of flame used in oxyacetylene gas welding.
Explain the process of submerged arc welding with the help of neat sketch with two salient
applications.
In carbon arc welding only DCEN (Direct current electrode negative), is used, justify.
Explain the principal of resistance welding and its application areas.
Differentiate between soldering and welding.
List of equipment used in shielded metal arc welding.
State the purpose of edge preparation in welding. Name different type of edge preparation in
butt joint with suitable diagram.
Which polarity is recommended in the carbon arc welding and why?
Give five application of soldering.
Describe the principal of electric arc welding. State of polarity preferred in D.C, welding machine
of arc welding to weld comparatively thicker plates.
Describe the oxidizing, neutral and reducing flame used in oxyacetylene welding with the help of
neat sketch. Given the reason why oxidizing flame is preferred to weld Cu-Zu alloy?