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.