Question 2
a) Explain the following heat treatment processes:
(i) annealing; (ii) tempering; (iii) normalizing.
(b) Name the constituents of the following alloys:
(i) brass; (ii) bronze; (iii) solder.
.
Observation
The Candidates did well on this question number. However, some of the candidates could not satisfactorily answer the questions asked in 2(b) and 2 (c).
Solution
(b) Reasons for Coating Vehicle Panels
To improve appearance
To provide a good base for subsequent coatings
To enhance paint sticking
To reduce the rate of corrosion on the panel
To improve the vehicle panel durability.
(c) The First two stages involved in the repair of minor damage on vehicle
bumper
- Examining the extent of damage.
- Selection of appropriate tools and equipment for the repair.