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Q2. With reference to safety valves fitted to waste heat boilers: A. State with reasons the areas which should receive particularly close examination during a survey inspection; B. Describe the procedure you, as Second Engineer would adopt when setting such valves at sea; C. State the procedure to be adopted when reporting the setting of a waste heat boiler safety valve, to a classification society.

Q9. A. With reference to the insulation testing of marine electrical plant: - I. State the reasons for insulation testing; II. State the precautions to be observed when testing intrinsically safe equipment. B. Describe the overhaul of d.c. motor which has been subjected to excessively damp condition or flooding with seawater.

Q8. Explain in detail how you would isolate one of sprinkler system for routine maintenance. Describe all tests and inspections you would make and how you would return the system to service.

Q8. Explain how each of the following conditions contributes to the satisfactory performance of oil centrifuges. A. Correct bowl speed; B. Cleanliness of bowl; C. Low rate of feed to the bowl; D. Contaminated oil preheated prior to centrifuging; E. Contaminated oil allowed standing for an appreciable time prior to centrifuging.

Q5: A. For an expansion valve, us fitted in a refrigeration system, name operational that may cause a high pressure cut –out operate?

B. Describe the preventive maintenance schedule to avoid reoccurrence of this situation stated in.

Q6. A. Describe the survey procedure of an oil lubricated stern bearing and shaft. (8)

B. Explain how the integrity of the outboard seal of an oil lubricated stern tube may be proved before the dry-dock is flooded. (8)

Q3. State the regular routines carried out on the following system:  A. CO2, total flooding system of engine room; B. Smoke detection system; C. Sprinkler system.

Q2.  A. As Second Engineer, outline your instructions to members of the ship’s engineering staff for inspection of the main engine timing chain; B. The inspection in A. has revealed that the roller chain needs replacement. Describe how this is achieved.

Q9: A heavy Oil purifier vibrates badly when just shutting down and coming to a stop. Suggest some reasons for this vibration problem, when you have already made an inspection of its drive mechanism and casing and found nothing unusual.