Q1. Sketch and describe the operation of a reliquefication plant for an LPG carrier. Enumerate the precautions and observations to be carried out before starting during running and after stopping the reliquefication plant.
Q2. Sketch and describe the hydraulic system for a Framo pump. State the normal maintenance required for the pump.
Q3. Sketch and describe a suitable burner which can be used on Gas and Oil in a boiler of a LNG ship. Enumerate the normal attention required on such burners.
Q4. A. Sketch and describe an electro hydraulic stabilizer, explaining how it restrains the rolling action of a vessel in a heavy seaway. B. What structural parts of the vessel are most affected by this restraint.
Q5.A. Sketch a watertight door and frame showing the manner of attachment to the bulkhead and the additional reinforcement carried by the bulkhead to compensate for the aperture.
B. Explain how water tightness of the door and frame mating surfaces is ensured with hydrostatic pressure tending to force the faces apart.
C. (i) Describe the means of closing the door;
(ii) State the number of closing stations and the position of each.
Q5. A. State why fixed pitch propellers have a poor efficiency when going astern.
B. With reference to controllable pitch propellers state:
i. Why is it preferable that the main servomotor be housed in the propeller hub rather than in the shafting forward of the propeller shaft?
ii. What regular maintenance and checks should be carried out to ensure maximum reliability of the gear at all times?
Q8. Describe how the following conditions can be avoided in auxiliary boilers - A. Furnace distortion; B. Uptake fires; C. Difficulty in maintaining normal water level.
Q1. You have been appointed as Second Engineer of an older vessel which is in dry-dock and recently been purchased by your shipping company. Describe, in detail about your inspection, to ensure that the equipment’s on-board ship related to safety equipment survey are satisfactorily complied with. (16)
Q5. With reference to Boiler water tests carried out onboard:
A. Discuss the possible reasons for the following changes in boiler water test results, and state what actions should be taken in each case;
1. Reduction in total dissolved solids and chemical reserves.
2. Reduction in phosphate reserve, with increase in chlorides and total dissolved solids;
3. Reduction in alkalinity reserve only.
4. Increase in oxygen levels only.
B. State why the complete results of boiler water tests are logged or entered into a data retrieval system rather than a note being made of any particular result which may be outside set limits.
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