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Q3. With respect to the properties of fuel oil, explain the significance of the following terms.

(a) Calculated Carbon Aromaticity Inbox (CCAI).

(b) Open flash point and Closed flash point.

(c) The importance of Sodium to Vanadium Ratio.

(d) Octane Number.

Q8. A. State the advantages of using steam turbine propulsion power for vessels carrying LNG cargo. B. With regard to the use of L.N.G. cargo as boiler fuel explain: (i)The safety precautions relating to the gas pipeline supplying the boiler and burning the gas in the boiler, (ii) The means of getting rid of “excess gases” during loading or discharge.

Q8. Explain why a material may fracture when stressed below its yield point. Give examples of components which might fracture in this way if suitable precautions are not taken. Explain how such fractures can be avoided with reference to the materials chosen, careful design and workmanship.

Q2. With respect to the survey of diesel main propulsion machinery by Classification Society:

(a) Explain the term Continuous Survey of Machinery (CSM).

(b) Explain how Class has reduced the need for attendance by the surveyor for some work.

(c) Describe how a planned maintenance scheme may be used to advantage with CSM.

(d) Describe TWO programs that are approved by the Class in order that physical opening up machinery is not necessary on every occasion.

Q5. GHG Ratings of ships have become new industry norms-Discuss various types of GHG Ratings applied to international shipping, with special focus on the role of second engineers in improving GHG ratings of ships.

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.

Q4. Exhaust gas cleaning system is one of the system used on board ship to reduce SOX emissions-

(a) Briefly discuss various types of Exhaust gas cleaning system used on board ship.

(b) What all data to be monitored and recorded when EGCS is in use to ensure that system meets all IMO regulations.

(c) What action you will take as second engineer if the system stopped working.

Q4. With reference to hull cathodic protection systems of the impressed current type:

A. Sketch and describe such a system;

B. Explain how protection may be ensured for the rudder and propeller;

C. State any precautions that should be taken when this type of system is installed.

Q7. With reference to Keyless Propeller:

A. Sketch a section through a keyless sleeved propeller.

B. State the advantages of using a keyless sleeved propeller

C. State with reason, Which metal sleeve should be made for contact with the forged mild steel tail shaft?

D. State the material uses to bond the sleeve to the propeller and the general thickness of the bonding material.