SOLDERING THEORY 4^th HOMEWORK

Please answer the following 10 questions on this sheet.

1.     Soft solder is an alloy of what two metals? ………………………………………………………………………………………….

2.     What proportion are these metals in? ………………………………………………………………………………………….

3.     Mains Soldering irons usually use what Voltage? ………………………………………………………………………………………….

4.     Lower voltage soldering irons are usually what values? (Give two) ………………………………………………………………………………………….

5.     The power rating is usually between what values? ………………………………………………………………………………………….

6.     Does a higher power rating mean a higher temperature? ………………………………………………………………………………………….

7.     What temperature should (degrees C) the soldering irons run at? ………………………….................................................................................................

8.     What temperature (degrees C) does the solder melt? …..………………………………………………………….…………………………..

9.     What is the main cause of a “dry joint”? ………………………………………………………………………………………….

10. What can be used to de-solder a joint? (Name 2) ………………………………………………………………………………………….

NAME ………………………………………………..    FORM ……………