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Q2. A. Describe the procedure to be adopted for the inspection of a safety valve fitted to an exhaust gas fired auxiliary boiler stating, with reasons, which parts should receive particularly close attention.

B. Describe the procedure for the setting of safety valves of exhaust gas operated auxiliary boilers;

C. Explain the required action a watch-keeping engineer should take after the setting of safety valves as in (B)

Q2. The pipe work of the sea water circulation system for a passenger ship has to be completely renewed. The company contracted for the work has no previous experience of marine installation. You as the Second engineer have been requested to write the specification for manufacture and installation of the steel pipe; outline your proposal for manufacture of the pipe; State the necessary requirements for approval.

Q2. Discuss the advantages and disadvantages of adopting the following for maintenance of main and auxiliary engines - A. Planned maintenance; B. Condition monitoring; C. Periodic replacement of components.

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.

Q8. A. Explain the necessity of intercoolers on a multi-stage compressor. What attention is required to keep them safe and in good working order? Sketch and describe an intercooler suitable for a 2400kPa compressor and state materials used.

B. What attention is needed before opening up an air compressor for inspection?

C. What faults are likely to develop in an air compressor and how are they remedied?

Q8. Explain how the ingress of sea water is prevented in an oil lubricated stern bearing system. Should the system fail, describe the corrective action possible whilst the vessel is afloat. State why two stern bearing oil header tanks are fitted in some instances?

Q7. Sketch and describe a stockless anchor illustrating the method or device used to attach it to the chain cable. When the anchor and cable are ranged during the ships underwater survey what parts require special attention and what defects are likely to be discovered?

Q9. With reference to multi-tubular heat exchangers explain:

(A) How and where impingement attack is likely to occur in the tubes

(B) Why is it desirable that coolant flow rate should not exceed that required to maintain correct fluid temperature

(C) Ample well-shaped water boxes and smooth tube inlets are desirable

(D) Partial obstruction of tube bore is a common cause of tube failure