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                  Question 4 
                           
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                  The  sketch below is an engine assembly. 
                      
                                (a)       (i)         Name  the parts labelled U, V, W, X and Y. 
                                    (ii)        State one function each of the  parts labelled V, W and Y. 
                                            (b)       Explain how induction is achieved in a  four-stroke engine. 
                                                   
                     
                    
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                 Candidates  who attempted this question performed excellently well.
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