Auto body repair & Spray painting Paper 2 WASSCE (SC), 2017

Question 4

 

  1. State the function of each of the following as used on auto body panels:
    1. degreaser;
    2. rust remover; 
    3. primer.

     

  2. State three merits of applying acid catalyst paints on vehicle bodies.
  3. List three methods of removing paint from the surface of vehicle bodies.

Observation

All questions here, except 4 (a), were adequately answered by the candidates. Here is the solution of the badly answered part of the question.

 

  Solution

(a)  One purpose of using some materials on auto body panels

  1. Degreaser
  2. It is used to clear panel surfaces of grease and oily particles that may glue to it and consequently affect its aesthetic properties.
                                                                                     

  3. Rust Remover
  4. It is used to clear panel surfaces of rust which may prevent good adhesion of paint with the panel body.
       

  5. Primer

It provides good adhesion of the paint to the panel body.
It acts as corrosion inhibitors on metals.

It provides sound base for subsequent coating.