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Q8. A Rating has been seriously injured by a "blow back" from the oil fired auxiliary boiler. As Second engineer, make a full report to Head office explaining the circumstances of the incident and the precautionary measures now taken to reduce the possibility of a similar occurrence in the future.

Q9. Give reasons why each of the following features is considered desirable in air compressors. A. Smooth air passages with minimum obstruction at valves; B. Minimum clearance volume C. Multi-tubular heat exchangers; D. Generous size of suction filter.

Q8. A. Sketch, and describe, a valve suitable for reducing air pressure and maintaining the reduced pressure within close limits. B. Describe the processes through which air from the starting air receivers should be treated before it is used in a pneumatic control system.

Q2. With reference to the carriage and pumping of liquefied gas cargo:

A. Sketch a suitable pumping system labelling the component parts;

B. State;

i) Why submerged hydraulically driven pumps are not used;

ii) How overheating of pump drive shaft bearings is avoided;

C. State, how the risk of fire and explosion in cargo tanks is obviated both in the loaded and discharged condition.

Q6. With reference to electro-hydraulic steering gears:

A. Explain in terms of control parlance, the function of the “Hunting gear”;

B. Explain the consequences if the standby pumping unit is motored;

C. State TWO methods employed to prevent the standby hydraulic pump being motored by the operating unit.

Q6. Briefly explain the term fatigue and explain how fatigue failure occur; State the difference between high stress / low cycle and low stress / high cycle; State how defect in metal can influence the expected safe life of a component; State how fuel timing and cylinder power balance can influence the possibility of fatigue crack.

Q7: Describe the following conditions are prevented in auxiliary boilers- A. Feed contamination by oil heating coil drains; i. Internal corrosion; ii. Furnace blowback; iii. Uptake fire; iv. Furnace distortion; Difficulty in maintaining normal water level.

Q1. You have been appointed as Second Engineer of an older vessel which is in dry-dock and recently been purchased by your shipping company. Describe, in detail about your inspection, to ensure that the equipment’s on-board ship related to safety equipment survey are satisfactorily complied with. (16)

Q8. A. State the advantages of using steam turbine propulsion power for vessels carrying LNG cargo. B. With regard to the use of L.N.G. cargo as boiler fuel explain: (i)The safety precautions relating to the gas pipeline supplying the boiler and burning the gas in the boiler, (ii) The means of getting rid of “excess gases” during loading or discharge.