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Q8. (a) State THREE modes of heat transfer. (1)

(b)Describe how the design requirements of EACH of the following are met, detailing the materials used to promote or retard heat transfer:

(i)plate cooler in central cooling system;(3)          (ii)meat room in domestic provisions space;(3)  (iii)auxiliary steam system pipelines. (3)

Q2. (a) Describe, with the aid of a sketch, the principle of operation of a modern shaft torsion meter. (8)

(b) Explain why it is important in terms of hull efficiency to measure and compare shaft torque and speed. (2)

Q3. Describe, with the aid of a sketch, the principle of operation of a radial lip stern tube sealing arrangement for an oil filled stern tube, which incorporates an air space and is designed to prevent pollution. (10)

Q5. (a) Describe TWO systems of priming centrifugal pumps. (6)

(b) List the advantages of EACH of the priming methods described in part (a). (4)

Q5. With reference to multi-tubular heat exchangers, explain how EACH of the following contribute to satisfactory performance:

(a) tube wall thickness;(2)              (b) dense population of tubes in the tube plate;(2)

(c) tube materials selection;(2)       (d) coolant flow rates;(2)

(e) unimpeded passage of coolant at entry and exit from the tubes. (2)

Q6. (a) Sketch a diagrammatic arrangement of a fully automatic direct expansion domestic refrigeration system which supplies a number of cold rooms. (5)

(b) State, with reasons, FIVE desirable thermodynamic properties of a refrigerant. (5)

Q7. Following a serious machinery space fire, the engine room was abandoned and an inert gas smothering agent used to extinguish the fire.

Write a report to the Superintendent Engineer detailing the sequence of events which led to this course of action and the subsequent actions taken to enable the vessel to proceed on passage. Include conclusions and recommendations in the report. (10)

Q8. During bunkering operations, a section of deck bunker line starts leaking fuel oil from a pinhole at the mid-section of the pipe.

(a) As Chief Engineer Officer, state the immediate actions to be taken to avoid a potential pollution incident; (4)

(b) Explain how a permanent repair could be made, stating any precautions to be taken and any further inspections that would be required. (6)