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. (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)
Q3. Describe the procedure to change the fuel supply system of the main propulsion engine from high viscosity fuel to low viscosity fuel such as diesel oil whilst on passage. (16)
Q4. With reference to main diesel engine starting air lines:
(a) Describe the main cause of a starting air line explosion. (8)
(b) Explain how a leaking start air valve can be identified while the engine is running. (4)
(c) State four different safety devices which can be incorporated into the starting air line to limit the damage caused by an explosion. (4)
Q5. State FOUR tests which are required for boiler water, giving a reason for EACH test. (16)
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