9. (a) Is it possible to successfully cut cast iron?
(b) Wrought iron?
(c) Cast steel?
(d) Rolled steel?
10. (a) Cutting can be done under water with ordinary cutting apparatus; why doesn’t the flame go out when submerged?
(b) What additional equipment is generally used in underwater cutting?
LECTURE NUMBER FOURTEEN
Subject—Brass Welding
1. Explain as fully as possible the chief characteristics of a good “filler-rod” for brass welding.
2. (a) Is a flux used in welding brass?
(b) What is one way of making a good flux for brass?