Automechanical Works Paper 2 May/June 2015

Question 12

(a)     (i)  Sketch a plunger type of oil pressure relief valve
                   (ii) Label any three parts.

          (b)     State four functions of oil in an engine.

Observation

The expected responses are given below:

 

         (a)               

                                  

          (b)     Engine oil is used:

                   -        to prevent wear;
-        to reduce friction;
-        as cleaning agent;
-        to seal the space between mating surfaces;
-         to prolong the life-span of engines.