2. (a) With reference to combustion within a two-stroke diesel engine, state the effect of EACH of the following:
(i) Early injection. (6)
(ii) Late injection. (6)
(b) Sketch an Out of Phase diagram (draw card) for a two stroke diesel engine. (4)
Q5. (a) State the consequences of not testing or treating the water in a boiler. (4)
(b) For a fire tube auxiliary boiler
(i) Explain how scale may form on the heating surfaces. (4)
(ii) State FOUR tests which are usually carried out on the boiler water (8)
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