Q6. You have opened up a main sea-water circulating pump (centrifugal type) onboard your vessel for examination and overhaul, describe the checks you would make, and state your conclusion regarding any faults found.
Q2. On arrival port after a passage, following repairs are to be carried out. Prepare the specifications for the workshop on: - Deck seal of a IG system used in an oil tanker; Main Engine cooling sea water Overboard valve Aft winch hydraulic oil pressure line, holed at deck penetration in the Steering Compartment.
Q8: Boiler automatic combustion control has failed during operation of boiler. Explain: A. Procedures to operate boiler in emergency. B. Action plan to investigate, rectify and bring system to normal boiler operation.
Q3. With reference to a cylindrical boiler which has undergone major repairs, explain: - A. How is the boiler prepared for carrying out hydraulic test? B. What is the test pressure to which boiler is subjected to? C. What inspection should be made before, during and after the test?
Q5. Write a report to your company’s Superintendent Engineer outlining the breakdown of a diesel generator engine and suggest remedial measures to prevent a recurrence of similar trouble.
Q6. One of the main engines turbocharger on the vessel aboard which you are serving as Second Engineer has suffered a sudden and unexpected failure, State the causes and action undertaken in bringing the turbocharger back into service. What action you will initiate to avoid such reoccurrence.
Q6. A completely new unit comprising piston, rings, liners, cylinder head and valves was fitted to a six-cylinder single-acting four-stroke diesel generator. Before installing the clearance and sizes were checked and considered satisfactory. During a trial run the running characteristics were abnormal so the generator was stopped. On examination, it was seen that the new piston had badly scored and drubbed the liner and had indication of seizure in the upper part of the liner. Give your reasoned comments for this failure.
Q9. With reference to refrigeration system on board ship, enumerate the following: - A. Consequence of lubrication oil pressure low; B. Procedure for charging the system; C. Charging of shaft seal of a compressor; D. Reason of ice formation on the return line.
Q9. With reference to dry-dock of sea going vessel, describe the following: - Precautions to be taken while the vessel is in the dry-dock; A. Checks to be carried out prior undocking; B. Precautions to be avoid fire in the engine room during the drydock.
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