Soldering and Brazing Multiple Choice Questions and Answers

11. The purpose of using borax in brazing is to......

1. Replace flux
2. Dissolve oxides when heating the work
3. Accelerate the formation of oxides on the work
4. Prevent the spelter from melting too quickly

12. The commonly used flux for brazing is.......

1. Resin
2. NH4CL
3. Borax
4. Soft iron

13. Heat for soldering process is supplied by.........

1. Soldering iron
2. Induction furnace
3. Electric resistance method
4. Any of the above

14. Spelter is same as......

1. Tin
2. Zinc
3. Lead
4. Silver

15. A braze joint may be satisfactorily used on components made of.......

1. Tinplate
2. Brass
3. Copper
4. Aluminium

16. The filler metal used in brazing has melting point of above

1. 200°C
2. 300°C
3. 420°C
4. 520°C

17. The commonly used flux in brazing is

1. Borax
2. Rosin
3. Lead sulphide
4. Zinc chloride

18. In soldering the melting point of filler metal is

1. below 420°C
2. above 420°C
3. below 520°C
4. above 520°C

19. The composition of soft solder is

1. lead-37%, tin-63%
2. lead-50%, tin-50%
3. lead-63%, tin-37%
4. lead-70%, tin-30%

20. The composition of electrician solder is

1. lead-37%, tin-63%
2. lead-50%, tin-50%
3. lead-63%, tin-37%
4. lead-70%, tin-30%