Q5. With reference to arresting the headway of vessels of considerable mass, give reasoned opinions on EACH of the following statements: A. Full power availability for astern running of the propeller is inconsequential; B. Results have been disappointing in those instances where rudders have been adapted to act as retarders; C. Discreet use of transverse thrust units may reduce stopping distance.
Q8. With reference to a periodically unattended machinery space of a dry cargo vessel discuss the requirements for.
A. Protection against flooding.
B. Control of propulsion machinery from the navigating bridge.
Q3. With reference to pipe system for sea water A. Enumerate the various material used and the type of deterioration likely to occur. B. Describe how corrosion is reduced and how erosion is minimized
Q4. State how legionnaire disease is contracted and the effects. A. Describe the condition that could lead to legionella bacteria being harbored in the air conditioning system; B. State the precaution necessary to reduce risks.
Q6. With reference to a bank of emergency lead acid batteries:
A. State the conditions of the battery bank if the specific gravity of a number of cells in the bank is in the region of 1.11 with an ambient temperature of 160Celcius;
B. Describe a systematic procedure for checking the conditions of the battery bank if it is divided into section for charging;
C. Describe the necessary routine maintenance;
D. Describe how capacity test carried out on bank of Batteries.
Q3. A. Sketch a line diagram of an automatic water sprinkler fire detection/alarm and firefighting system fitted in accommodation and service spaces of passenger vessels; B. Describe the system sketched above and its mode of operation; C. State the action that should be taken after the use of sea water in the firefighting system
Q5. With reference to an oil/water separator:
A. (i) Sketch such a device; (ii) Describe the passage of oil/water mixture from the delivery of pump to the outlets of separator.
B. State how oil density and temperature affect the case of separation of oil from water.
C. State how the movement of oil on board ship or its discharge and the discharge of oily-bilge ballast water overboard is recorded.
Q5. In engine rooms that are operated under UMS conditions describe with the aid of sketches how the following are monitored:
A. The perforation of a high-pressure fuel pipe;
B. The imminence or possibility of a scavenge fire;
C. Condition that may be conducive to a crankcase explosion
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