waecE-LEARNING
Auto Mechanical Work Paper 2, Nov/Dec 2013  
Questions:   1 2 3 4 5   Main
General Comments
Weakness/Remedies
Strength













































QuestioN 3

      (a)       (i)         Sketch the coil ignition system for a four-cylinder engine.

                                    (ii)        Label three parts.

  1. State the function of each of the following parts of an ignition system:


(i)        condenser;
(ii)       contact breaker;
(iii)      segment.

_____________________________________________________________________________________________________
OBSERVATION

 

This question was extremely difficult for the candidates as they could not provide the required responses to the various parts of the question. 
The required responses to the various parts of the question are:

 

 

 

 

 

                        (b)       (i)         Condenser reduces arcing or burning of the contact breaker by
absorbing the flowing current.

                                    (ii)        The function of the contact breaker is to interrupt the flow of
battery current through the primary winding of the coil at pre-
determined intervals.

(iii)       The function of the segment is to conduct the high voltage current from the rotor through the high tension cable to each spark plug.

This question was extremely difficult for the candidates as they could not provide the required responses to the various parts of the question. 
The required responses to the various parts of the question are:

 

 

 

 

 

                        (b)       (i)         Condenser reduces arcing or burning of the contact breaker by
absorbing the flowing current.

                                    (ii)        The function of the contact breaker is to interrupt the flow of
battery current through the primary winding of the coil at pre-
determined intervals.

(iii)       The function of the segment is to conduct the high voltage current from the rotor through the high tension cable to each spark plug.


         

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