NORTHERN INDIA ENGINEERING COLLEGE DELHI
Mechanical and Automation Engineering Department
Course:- B.Tech. Ist Semester
Assignment No-4
Sub:- Manufacturing process
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
Using the net sketch describe submerged arc welding with its advantages and applications.
Describe the principal of resistance welding. Name its different type of application.
Write short note on coding of electric arc electrode.
Sketch and explain three type of flame used in oxyacetylene gas welding.
State of advantages and limitations of arc welding.
Distinguish, between welding, brazing and soldering.
With the help of neat sketch explain the following welding methods.
(a) Flash butt welding
(b) Percussion butt welding.
Which metals can be joined by shielded arc welding? What are the some important advantages
of this welding?
Write short note on the following:
(a) Gas welding equipment
(b) Spot welding
(c) Seam welding
What are the advantages and limitations of welding process over other joining processes?
Explain the term DCSP and DCRP in arc welding.
What is edge preparation in welding?
How will you select an electrode for a welding.
What is flux and what are its functions?
Explain with diagram the working advantages, limitations and application of submerged arc
welding.
Explain various types of joints in welding.
Explain the equipment, working and applications of oxyacetylene welding.
How does gas welding differs from arc welding.
Why flux is not required in electric resistance welding?
Which joint is strongest-solder joint gas welding joint, brazed joint or arc welded joint. Justify
you answer.
Classify welding processes. Identify and jointing process for electronic components on printed
circuit board (PCB).
Write brief notes on:
(a) Oxyacetylene welding.
(b) Spot and Seam welding.
(c) Soldering and brazing.
(d) Welding and weldability.