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Q1: Describe how the following conditions are prevented in auxiliary boilers:

A. Feed contamination by oil from heating coil drains.

B. Internal corrosion.

C. Furnace blowback.

D. Uptake fire.

Q2. Write a report to your Engineer Superintendent describing a breakdown of the main refrigerating plant for cargo or ship provision giving reasons for the breakdown, the method of repair and the action taken to prevent a recurrence.

Q4. A. During the weighment of CO2 bottles required for total flooding of Engine room, it was observed that few bottles are less than the original capacity. State the reasons for the same and checks / tests to be made prior refilling. (8)

B. State how often the CO2 bottles are required to be weighed and pressure tested. (8)

Q5. During the past four months since you joined the ship as Second engineer a number of main engine exhaust valve have suffered from cracking and corrosion at the seating faces. Write a report to the Superintendent Engineer covering the following points:

A. An explanation detailing how the problem becomes evident.

B. Your action upon recognizing the extent and seriousness of the problem.

C. Your reasoned view regarding the possible causes of the problem.

D. Your recommendations to avoid future incidents.

Q6. With reference to marine gearing and gearbox.

A. Why the first examination after commissioning is of special importance.

B. What part would receive the closest scrutiny and what defects might possibly be found.

C. The gearing faults that are likely to develop early in the life of the vessel.

Q7. What is understood by risk on board ship? As a 2nd engineer discuss various methods for hazard identification and assessment of risk available on board. (16)

Q8. With reference to electro-hydraulic steering gears:

A. Sketch and describe a steering gear with two 50% torque units conforming to the single failure criteria. (8)

B. State, with reasons, the precautions necessary when operating on two rams only: (4)

C. Describe the tests necessary to ascertain that the gear will operate as required when one side of the circuit develops a malfunction. (4)

Q9. a) Explain metal fatigue and how fatigue failure occurs. (4)

b) Differentiate between high stress/low cycle and low stress/high cycle fatigue giving example of each. (4)

c) How do defects in the metal influence the expected life of a component. (4)

d) How does fuel injection timing and cylinder power balance influence the possibility of fatigue cracks developing in the bedplate. (4)