Q1. State, with reasons, EIGHT areas or items which should be checked by the duty engineer before taking over the watch. (16)
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)
Q3. With reference to Jacket Cooling Water treatment of a diesel engine:
(a) State the chemical tests caried out (6)
(b) State the frequency of testing (2)
(c) Explain why it is necessary to keep the test results within certain limits (4)
(d) State the action to be taken to rectify an abnormal test result (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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