91. What are the essential differences between arc welding andresistance welding ?
2. Essential differences between brazing and fusion welding?
3. Explain the basic principles of arc welding processes
4. Why arc welding is called stick welding
5. can arc welding be used to join plastic materials?explain
6. What is a flux
7. What are the purposes of using flux?
8. Flux can be used in which joining processes
9. What are the disadvantages of using flux
10. What are the advantages of mechanical fastening
