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Q8. While operating in heavy weather the main engine loses power and misfires. Investigation shows considerable quantities of water in the fuel.

A. As Chief Engineer Officer explain the immediate action which should be taken to ensure safe operation of the ship.?? (6)

b. State, with reasons, the possible sources of water entering the fuel storage, handling and supply system.  (5)

c. As Chief Engineer Officer write the standing orders that would be issued with respect to operation of the fuel storage, handling and supply system. (5)

Q8.  A.Explain why pilot injection is required for a dual fuel engine when burning natural gas. (2)

b. Describe, with the aid of a sketch, the arrangements for a dual fuel engine which is capable of burning natural gas on:

i. The Otto cycle (7)

ii. The Diesel cycle (7)

Q3. With reference to crankcase lubricating oil:

(a) Describe the causes and effects of bacterial attack; (6)

(b) Explain how bacterial attack may be detected; (4)

(c) Describe how a crankcase lubricating oil system may be returned to service following bacterial attack. (6)

Q4. Write a report to the superintendent engineer concerning an incident of turbocharger vibration and surging which occurred on a two stroke, direct drive, main propulsion engine during a normal passage in calm weather. The report must include information about the immediate action taken to prevent damage, the subsequent action to remedy the fault and recommendations to prevent subsequent future incidents. (16)

Q5. Write a procedure for the actions to be taken in the event of an engine Oil mist alarm being activated, stating the reason for EACH action. The procedure must cover the period from activation of the alarm to return of the engine to normal operation. (16)

Q8. a. State, with reasons, SIX points that should be covered by a risk assessment for the inspection of a main engine crosshead bearing. (6)

b. State how it can be ensured that the lifting equipment used for the inspection of a crosshead bearing is fit for the purpose intended. (4)

c. list THREE defects which might be detected during inspection of a crosshead pin and bearing, stating the probable cause of such defects. (6)

Q7. A. Explain why cylinder power balance is essential to good engine operation, indicating the possible damaging effects of cylinder power imbalance. (6)

B. Describe the for checking the performance and of an engine cylinder. (4)

C. Explain how cylinder power may be balanced across an engine. (6)

Q8. a. Explain why top bracing is used for large crosshead engines. (4)

b. Describe, with the aid of a sketch, a hydraulic top bracing unit for a large crosshead engine indicating where the top bracing is fitted and how it operates. (6)

C. Write instructions for the checking of a large crosshead engine top bracing system and a holding down system. (6)

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)