Auto mechanics Paper 2 WASSCE (SC), 2018

Question 3

 

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Fig. 5: A Sectional View of Cylinder Block with Wet Liner
Use the sketch in fig. 5 to answer the questions in 14 (a)

(A)(i)   State two functions of the unit in automobiles.
(ii)  Name the parts labelled M, N, P and Q.
(iii) State one function of the part labelled Q.

(B)State the firing order of four-stroke engine with:
(i)   four cylinders;
(ii)  six cylinders.

 

Observation

 

      (b)  (i)   The Firing Order of Four-Stroke Engine with Four Cylinders
        1 – 3 – 4 – 2   OR  
        1 – 4 – 3 – 2   OR
        1 – 2 – 4 – 3                                                               
             (ii)  The Firing Order of Four-Stroke Engine with Four Cylinders
        1 – 5 – 3 – 6 – 2 – 4    OR  
        1 – 4 – 2 – 6 – 3 – 5