Q1. A. Explain the ideal design requirements of a ships propeller; B. briefly describe the propeller maintenance that should be carried out to prevent the fuel being wasted.
Q2. With reference to lifeboats, describe with the aid of sketches: i. The handbrake used for lowering and state how it may be tested; ii. The centrifugal brake and state the method of testing; iii. Lifeboat servicing requirement and intervals for life boat wire fall renewal as per SOLAS 74. iv. The handbrake used for lowering
Q3. A. Explain the causes of the formation of mill scale on steel plate. Describe the preparation necessary before the application of conventional paints to the underwater surface of the hull; C. Describe a coating scheme for the underwater hull using conventional paints.
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).
Q5. With regards to keeping the gas side of a boiler in good condition discuss each of the following A. The mechanism of combustion stating the factors which are important for good combustion; B. Fuel oil treatment; C. Soot removal equipment.
Q6. A. Draw a block diagram for a fully automated accommodation air conditioning unit, labelling the component parts and indicating the directions of air flow; B. Explain why the unit includes means of dehumidification and humidification; C. A chart is used for ensuring that the accommodation conditions are within the so-called Comfort Zone: what useful information does the chart give?
Q7. With reference to air compressors give a reasoned opinion as to the accuracy of the following statements A. Bottom end and main bearing wear down is critical to compressor performance B. High flow rates in air discharge lines are desirable C. The smoother bore and the less obstruction in discharge lines and valves, the better.
Q8. Explain why regular testing of water in auxiliary boiler is desirable; for each test, i.e. is carried out; Reason for making test; Acceptable values for any particular type of boiler; Action to be taken if measured value differs from desired value.
Q6. Sketch and describe a system for oil monitoring of bilge and tanker ballast discharges. What inputs are recorded? Explain the difficulties encountered with the efficient operation of the oil monitoring system.
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