Question 7
a. What is meant by desoldering?
b. List two items required for:
(i) soldering;
(ii) desoldering.
This question required an understanding of the process of removing and fixing components on the main board of a mobile phone. Performance of candidates in this question was fair.
Observation
The expected answers are:
a. Desoldering; This is the process of removing lead from the legs of circuit components through the application of heat
b. (i) Items required for soldering
Any correct 2
- soldering wick
- soldering lead
- wet foam / pad / sponge
- flux / paste
- hand gloves
(ii) Items required for desoldering
Any correct 2
- soldering wick
- lead sucker / desoldering pump
- alloy removal / flux removal
- needle
- flux / paste