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Q2. Sketch a high-lift safety-valve lid and seat detailing their special features. Describe how such a valve is overhauled and any clearance that should be measured and noted. (16)

Q6. A. State, with reasons, the causes of fatigue cracking of engineering components; B, State, with reasons how material and design defects can influence fatigue life. C. With reference to engine bed plate transverse girders explain how the incidence of fatigue cracking can be minimized.

Q4. A. Describe with the aid of sketches where necessary a vane type steering gear showing how to weight of the rudder and stock are carried and the arrangement that allow for wear down;

B. State how the vanes described in (A) are secured and the method of sealing the edges;

C. State how, if necessary, the steering gear is locked for rudder maintenance.

Q8. A. the UMS monitoring and control system of your ship has recently started to give false alarms and incorrect data printouts. State, with reasons, possible causes if the false alarms and reading are: I. Localized to a particular area of engine operation; ii. General to the engine room B. State, with reasons, the action you, as Second Engineer, would take to ensure continued safe operation of the vessel if the defects were general to the engine room. C. Explain the procedure you, as Second Engineer, would adopt in order to locate and rectify a general fault in the UMS system.

Q2. Sketch suitable welded joints indicating the approximate plate thickness and dimensions of preparation for the following purposes - A. End plate connection to the shell of an unfired pressure vessel; B. Longitudinal seam of an unfired pressure vessel; C. Prefabricated combustion chamber for an auxiliary boiler

Q3: A. (i) Sketch a combustion gas system, suitable for inerting the cargo spaces of a vessel; (ii) Describe the operation of this system. B. State the percentage analysis by volume of the inert gas generated by the system in (A).

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.

Q4: An auxiliary engine exhibits a tendency to hunt to such an extent that the engine speed variation prohibits the connection of the machine to the switchboard. (a) Discuss the possible causes of hunting. (b) Explain how the problem of hunting can be rectified.

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.