Auto Body Repair & Spray Painting 2, May/June 2014  
Questions: 1 2 3 4   Main
General Comments

Question 2

(a)       (i)         Explain the importance of spraying gun air-nozzle.
                                    (ii)        List three types of spraying gun.

                        (b)       State three factors that determine the size of the fluid tip of a spray gun.
                        (c)        Sketch a multiple jet air cap of a spray gun.

This question was avoided by all the candidates who sat for this paper. 
The required responses to the various parts of the question are given below:

(ai)       The importance of spraying gun air nozzle at the front of the gun is to direct compressed air into the steam of paint, thus atomizing it and forming the spray pattern.

(aii)      -           suction feed;
            -           gravity feed;
            -           pressure feed.

                        (b)       -           viscosity of paint being sprayed;
                                    -           volume of air available;
                                    -           speed of application required;
                                    -           type of paint being sprayed.




Powered by Sidmach Technologies(Nigeria) Limited .
Copyright © 2015 The West African Examinations Council. All rights reserved.