(b) How hot should work be, previous to adding “filler-rod”?
(c) What will occur if too much heat is applied?
5. (a) In what respect does the adjustment of the flame differ on malleable iron from that of cast iron and steel?
(b) How is the flame held in relation to the work?
(c) Does the flame come in direct contact with the “filler-rod”?
6. (a) Is more, or less, surface covered by the “filler-rod” on malleable iron than on cast iron?
(b) Why?
7. (a) How should malleable iron be cooled?
(b) Is this the same as in welding brass?
8. On what part of machinery does a welder generally expect to find malleable iron castings?