Automechanical Works Paper 2 May/June 2015

Question 13

(a)     (i) Identify the unit shown in the sketch below.   

 

(ii) Name the parts labeled V, W, X, Y and Z..

(b) (i) State one function of the parts labeled W, X and Y

(ii) State the function of a thermostat.

 

Observation

          The expected responses are given below:
                                     

   (a)  (i)  The unit is cylinder head assembly

     (ii)  V: thermostat housing

W: valve spring
X: valve cover
Y: rocker shaft
Z: pushrod

     (b) (i)   W: It keeps the valve properly seated in its position.

      

Y: It holds the rocker arm in position.
X: It protects the upper part of the cylinder head.

(ii) The thermostat allows for quick warm-up of the engine