Q1. With respect to Main Propulsion Engines, state the immediate action to be taken as Engineer Officer of the watch in the event of EACH of the following, stating ONE reason why EACH action is necessary:
(a) Turbocharger repeatedly surging. (4)
(b) Air start manifold/branch pipe overheating local to one unit. (4)
(c) Low scavenge air temperature alarm. (4)
(d) Engine misfires, fuel rail pressure low alarm activates, booster pump pressure high (4)
Q2. Explain the constructional differences between 2-stroke Slow Speed and 4-stroke Medium Speed diesel engines. (16)
Q3. With reference to high viscosity fuel oil:
(a) Explain how it is treated between storage tank and main engine. (10)
(b) State the purpose for the treatment explained in part (a) (6)
Q4. With respect to two-stage reciprocating compressors used for air start purposes:
(a) State FOUR reasons for taking too long to fill the main starting air bottles. (8)
(b) State FOUR safety devices that may be fitted. (8)
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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