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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.

Q6. With respect to tankers describes: - (16)

A. How a pump room is ventilated?

B. How cargo tanks are ventilated?

C. Cargo tank protection as per SOLAS 1974.

D. Additional alarms provided for inert gas systems of the ‘inert gas generator’ type.

Q1. You have been appointed as the Second Engineer of an eight years old vessel, recently purchased by your shipping company. Write a report to the engineering superintendent covering the inspection of main propulsion machinery carried out by you, to ensure its trouble free operation.

Q7. With reference to auxiliary boiler safety valve:

A. Describe, with aid of a Sketch the safety valves for an auxiliary boiler;

B. Identify, with reasons, the part that require particularly close attention during overhaul;

C. Describe how the safety valves are reset after an overhaul.

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.

Q6. With reference to electro-hydraulic steering gears:

A. Explain in terms of control parlance, the function of the “Hunting gear”;

B. Explain the consequences if the standby pumping unit is motored;

C. State TWO methods employed to prevent the standby hydraulic pump being motored by the operating unit.