Q2. (a) State TWO differences between a trunk type and a crosshead type diesel engine. (4)
(b) Describe, with the aid of sketches, the combustion process of the two-stroke compression ignition engine. (12)
Q5. With reference to auxiliary boilers:
(a) Explain how scale forms on the heating surfaces (8)
(b) State TWO reasons why scale is undesirable (4)
(c) State how scale build up is prevented from forming in steam boilers (4)
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