3. (a) What kind of a flame is used in brass welding?
(b) Why?
4. (a) In what position is the flame held in welding brass?
(b) How should the “filler-rod” be held?
5. (a) Is it advisable to “V” out or burn off the ends of brass work to be welded?
(b) Explain why.
6. (a) What causes the dense white fumes to appear when fusing brass?
(b) What is cause of brass welds being porous?
7. Why should brass work not be disturbed when red hot?
8. What is the most difficult part of brass welding as a whole?