SHEET METALS 459 



18. What is brass? What are its physical characteristics? 



19. Explain the meaning of the following sheet-metal terms: 

 anneal, temper, extended metal? 



20. What is German silver? Name some of its uses and its 

 physical properties. 



21. What is a bronze? Name some of the common bronzes, 

 their uses and their physical characteristics. 



22. What is soldering? Why is it necessary to use a flux? 

 Name some fluxes. 



