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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.

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.

Q2. With respect to bunkers handling on ships using LNG as alternative fuel, discuss the following:

(a) How are the bunkers taken onboard ships tanks?

(b) Discuss the check lists, arrival checks and factors to be considered for bunkering?

(c) Risk analysis methodology to ensure safe bunkering operations?

(d) Explain how the bunker is prepared and used onboard the engines?

Q9. With reference to Inert Gas Generator fitted on gas carriers:

a. Sketch a line diagram showing a typical 'Inert Gas System' used for inerting in gas carriers, labelling the component parts. (6)

b. Describe the system. (5)

c. State the function of a chiller used in this type of inert gas generator. (5)