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Q5. Discuss the dangers associated with a main engine starting air system, explaining how Discuss these dangers are mitigated. (9)

(b) State, with reasons, THREE causes of an engine failing to fire on fuel after successfully turning over on starting air. (3)

(c) Explain how the engine is transferred to local (engine side) control in the event of failure of the main engine remote control system. (4)

Q7. Write a report to the engineering superintendent regarding the replacement at sea of a damaged main engine cylinder cover. The report must explain how the problem was detected, the likely cause of the damage and the action which has been instituted to prevent further incidents of this type. (16)

Q2. As Chief Engineer write instructions for the main and auxiliary engine fuel change-over procedures to be followed when a vessel is due to move into an Emission Control Area. Approximate times must be mentioned to ensure that the vessel does not infringe any regulations and the instructions must mention steps required to avoid cross-contamination of fuel in service tanks, where MGO is carried as the low sulphur fuel. (16)

Q2. With reference to main engine crankcase explosions:

a. Explain the cycle of events leading to a secondary crankcase explosion; (6)

b. As Chief Engineer, explain how an engine system should be managed in order to minimise the risk of a crankcase explosion and the effects of a crankcase explosion should one occur. (10)

Q9. With reference to a waste heat boiler/economiser:

a. Write a procedure for the cleaning the gas side of an exhaust gas boiler/economiser when the

associated main engine is:

(I) running; (5)                              (ii) stopped. (5)

b. Write a procedure for operation of the main engine when the associated waste heat boiler/economiser cannot be operated due to tube failure. (6)