Q1. A. State the standing instruction you, as Second Engineer, would issue with respect to the action to be taken in the event of a boiler uptake fire; B. State how the incidence of uptake fires may be minimized; C. State the reasons for blow – back from the furnace of an auxiliary boiler; D. State the standing instruction you, as Second Engineer would issue with respect to the avoidance of boiler furnace blow – back.
Q6. With reference to hydraulic system for deck machinery identify: A. The types of contamination likely to be found in hydraulic systems for deck machinery; B. The sources of such impurities; C. Means used to prevent problems with contamination; D. Possible effects of the oil contamination on the system.
Q3. Sketch and describe a cargo space inert gas system producing washed gas from either a main boiler or from an independent gas generator module. Elaborate the alarms and cut-outs incorporated in the system to prevent any accident.; Explain the various protections for cargo tanks with respect to pressure vacuum build up inside the tanks.
Q4. A. Identify the chief causes of overheating in tunnel bearings and of vibration in main shafting. B. Explain why the seating of the engine room amidships enhances these tendencies. C. State how overheating and vibration may be reduced or eliminated.
Q5. A. Examine in detail three common but entirely different reasons for loss of steering gear systems. B. State how failure is inhibited in the design, operation and maintenance of steering gear systems C. Describe how a vessel may make port upon irreparable failure of the steering telemotor
Q6. State why the temperature of lubricating oil supplied to an engine needs close control. Sketch and describe an arrangement and explain the principle of operation of instrumentation and control equipment for automatically maintaining the temperature of lubricating oil supplied to an engine at its desired value
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?
Q9. A. What are the conditions required in the cylinders of a marine diesel engine for good combustion? B. State under normal working conditions how the following may occur Black smoke, White smoke, Blue smoke. C. What may be the suspected cause for each case to occur? What would be the remedy for it?
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