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Q1. Discuss the factors that lead to the selection of materials for use in a sea water cooled, multi-tubular heat exchanger. (10)

Q1. With reference to machinery parts under cyclic loading, describe, with the aid of sketches, how the propagation of even the smallest of cracks can lead to total component failure. (10)

Q3. Describe, with the aid of a sketch, the operation of a static Oily Water Separator which conforms to current MARPOL regulations and utilises a pump on the discharge side of the separator. (10)

Q6. With reference to tunnel type bow thrusters:

(a) explain why some vessels are fitted with more than one bow thruster; (2)

(b) discuss the options available in terms of prime mover and transmission systems. (8)

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)

Q11. Explain the meaning of EACH of the following types of electrical equipment:

(i) intrinsically safe; (2)        (ii) flameproof; (2)     (iii) increased safety; (2)

(iv) pressurised enclosure. (2)

(b) State TWO types of lighting equipment that may be installed in the pump room areas of a crude petroleum carrier. (2)

Q9. Describe, with the aid of a black diagram, how automatic starting load sharing and stopping of generators in response to load changes is effected. (10)

Q12. (a) Describe, with the aid of sketch, how a hydraulically operated folding hatch cover opens and closes. (7)

(b) Explain how the water tightness and security of the hatch cover sketched in part (a) can be ascertained before proceeding to sea. (3)

Q12. (a) State, with reasons, the potential hazards that may be present in EACH of the following spaces:

(i) an oily bilge tank; (2)      (ii) a ballast tank; (2)           (iii) a refrigerated space. (2)

(b) State the procedures to be undertaken prior to entering enclosed spaces. (4)

Q12. With reference to roll reduction systems, explain the principles of operation of EACH of the following, stating the advantages and disadvantages of EACH:

(i) Bilge keels (5)

(ii) Passive Uncontrolled Tanks (5)