11. The purpose of using borax in brazing is to......
12. The commonly used flux for brazing is.......
13. Heat for soldering process is supplied by.........
14. Spelter is same as......
15. A braze joint may be satisfactorily used on components made of.......
16. The filler metal used in brazing has melting point of above
17. The commonly used flux in brazing is
18. In soldering the melting point of filler metal is
19. The composition of soft solder is
20. The composition of electrician solder is
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