Question 4
(a) (i) Name three methods of straightening auto body panels.
(ii) Name two tools used for carrying out minor repair on auto body panels.
(b) State three steps taken when welding aluminium panel.
(c) (i) List two materials used in plastic repair.
(ii) State one merit of using fibre glass for auto body construction.
Observation
The Candidates did well on this question number. However, some of the candidates could not satisfactorily answer the questions asked in 4(b) and 4(c). The solution of the poorly answered parts of the question are given below.
(b) Steps Taken in Welding Aluminium Panel
- Placing the panel on flat surface
- Cleaning the surface of the aluminium panel
- Regulating the heat before welding
- Pre-heating the surface to be welded
- Wiping off wax and grease
- Removal of paint coating using abrasives
(c) (i) List of Materials Used for Plastic repair
Adhesives, abrasives, sealers, masking tapes, hot-air gun, plastic
cleaner, reinforcement patches
(ii) Merits of Using Fibre Glass for Auto Body Construction
- It is light in weight.
- It is easier to construct.
- It is very resistant to corrosion.
- It requires little maintenance.
- It is suitable for constructing complex shapes.