Q1) With reference to rotary vane steering gears:
(a) Describe, with the aid of a sketch, how such a unit incorporates an integral rudder carrier (10)
(b) Explain how vertical rudder movement is accommodated (6)
Q2) A main air compressor interstage air-cooler has burst. Put down a logical sequence of event that could have caused this accident. Put down your analysis, point by point and complete in technical detail (16)
Q4) Give an outline sketch of Heavy F.O. settling tank heating system and briefly explain the system. Sketch only the low-pressure steam inlet up to condensate collection tank (16)
Q5) The auxiliary boiler of a ship periodically needs feed water, and the rate of feed is gradually increasing every day, without an increase in demand. Suggest some causes for such a happening. (16)
Q7) The by-products of oxidation, as a result of water contamination of hydraulic oil are generally: (16)
(a) Removed by cellulose type filters
(b) Gums, varnishes, and acids
(c) Always neutralized by oil additives
(d) Harmless and have no effect on system components; Briefly justify your answer.
Q6. Explain the following terms and give examples of where each condition might occur
a) Stress Corrosion cracking (6)
b) Creep cracking (5)
c) Corrosion fatigue (5)
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