Auto body repair & Spray painting Paper 2 WASSCE (SC), 2016

Question 5

    

 

(a) List three constituents of paint.

 

(b) State two causes of spray fog.

 

(c) With the aid of a sketch, show: (i) correct spray pattern; (ii) heavy centred pattern.

Observation

    (a)       Three Constituents of Paint

  • - Pigment;
  • - Binder;
  • - Solvent (thinner) and
  • - Additives.

                                                        

(b)  Two Causes of Spray Fog

  • - Over atomization of the paint
  • - Too thin a paint
  • - Wrong use of spray gun                                                     

 

 (c)  The Sketches of Correct and Heavy-Centred Spray Pattern