Q1. A fire in the exhaust gas boiler on a motor ship may develop in two or three stages. With reference to such situations, discuss: A. The factors which could be a cause for initiation and development of: (i) Ignition of soot; (ii) Small soot fires; (iii) High temperature fires. B. State the standing instructions you, as a Second Engineer Officer, would issue with respect to the action to be taken in the event of a boiler uptake fire.
Q3. A. Sketch and describe TWO methods that employ manometric means for measuring tank contents. (6)
B. State what corrections are made to the readings obtained by the methods described in (A) in order to gauge the mass contents? (5)
C. Explain how bunkering requirements may be estimated when no records of main engine fuel consumption are available on board. (5)
Q2. With reference to the carriage and pumping of liquefied gas cargo:
A. Sketch a suitable pumping system labelling the component parts;
B. State;
i) Why submerged hydraulically driven pumps are not used;
ii) How overheating of pump drive shaft bearings is avoided;
C. State, how the risk of fire and explosion in cargo tanks is obviated both in the loaded and discharged condition.
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